1625 Tube Amp

2A3 SE; 1625 PP; Dynaco 6v6 Push-Pull tube amplifier; Other. ESC (Electronic Service Center) Elkin 4 Tube Base (1625 Version) Documentation Project CBTricks. It can produce 75W per channel into 8Ω and 4Ω. Class C telegraphy maximum plate dissapation, CCS 25 Watts, ICAS 30. This tube is regarded as the holy grail among the double-triode preamp valves. Doesn`t say what sort of modifications they have. Dark Cutting Oil; Select options. Dtronics DT-01. Bob published his circuit in Sound Practices, and since then a wide variety of these amps have been produced and enjoyed by enthusiasts all over the world. Save big on our app! CATEGORIAS. I do not believe that the katana will sound better than a tube amp but that is just my opinion. Return for any reason post marked within 2 weeks after you receive the amp(s) for a full refund, no restocking of the usual 25%. 70 imperial fitting #66-fl, l/2″ o. -You will need two 1/8" to rca cables. The overall height of this sculpture is 38 inches. This is a single-ended triode amp that I built using the 813 transmitting pentode, connected as a triode. power cord. 220 v 60 Hz, 220v 50Hz -4. All tube too, sounded. Apr 28, 2019 - Dave's Homemade Radios Crystal Set #58, is changed to a one 1625 tube radio before your eyes. Maybe tubes aren't as powerful or as accurate as solid state designs but there is just something thrilling about tubes that can't be beat. 1625 1626 Author: Tung-Sol Subject: JA-FP-2005-12-23 Created Date: 12/23/2005 11:03:25 AM. In Class B amplifier for a 10 Watt output using 2 X transitor pushpull type will have efficiency 78. Starter: Electric: Instruments:. At the time the only rig I had was a Hallicrafters SR-150 transceiver. Here is a vintage Newcomb Square Dance 4 Speed Record Player Model TR-1640 M with a Tube Amplifier and 2 Detachable Speakers, all mounted in Cabinets, made by Newcomb Audio Products of Hollywood Calif. Vacuum Tube - 1625, Beam Power Amplifier High-perveance beam power pentode designed for use as a horizontal deflection amplifier tube in. In the mid 1970's I built a Tiny Tim linear amplifier from an article by Russ Covington in the August 1971 issue of 73 magazine. Would like to have a copy of the manual that was sent with this amp when purchased new as well as any other info that would be a source of info on this amp. Drums & Percussion All products in. Sort TORK 40 Amp 120-Volt to 277-Volt SPST 24-Hour Digital 1 Channel Timer Switch in Gray. Working on a project? We know that's why you're here. Both tubes are audio power amplifier beam tetrodes in the output stage of high power amplifiers but they are suitable for high frequencies also. January 2014 World Premiere! Triode Lab 2A3-S Vacuum Tube Power Amplifier Triode Lab is the little company that can. Beam Power Tube. 1pc Shuguang FU25 Electron tube replace 1625 Valve For HIFI Vacuum Tube Amp DIY. I found I could work stations in about a 200km radius during the day with 5 - 10 watts, but at night I could work no one at all. If you have any issues navigating our site, please feel free to contact us via phone at 910-594-0219 and ask for the web ordering department. pdf (82848 bytes) 8/03QM Ferranti CRT 8-03AM. Home » THE BANDIT Rx Pre-Amplifier. Broan® 30-Inch Convertible Under-Cabinet Range Hood w/ Easy Install System, 220 CFM, Black. If you have a problem with our. 1625 Tube, select Beam Power Amplifier 1-800-RFPARTS (1-800-737-2787) 1-760-744-0700 (USA) ORDERS: [email protected] AliExpress. this is a stereo tube amplifier made from scratch. 0 Amp, 3-speed induction motor. Sams' index goes back to 1946 and a majority of tube amplifiers & tuners made for consumer use between 1946 and 1970 have appeared in Photofact folders, as do most tube radios, consoles, intercoms and TV sets (with some major exceptions, like Fender guitar amps). Bob published his circuit in Sound Practices, and since then a wide variety of these amps have been produced and enjoyed by enthusiasts all over the world. > >> Item Qty Part Number Br Unit Price. 00: MA : May 12, 2020: 5 : FOR SALE: Primaluna Dalogue Premium Amp with 2 tube sets: USD $2500. No global feedback around the transformer, instead I decided to experiment with plate-to-plate feedback. com - Bottom mounting ceramic socket has 1-13/16 mounting centers. The filament may be hard to see. Going low voltage/high current creates some issues but in tradeoff it does solve some other issues. Single ended tube amplifier output transformers. This is an. Rectification is via a 6CA4 full wave rectifier. Glen, K9STH. We don’t want to show off, but nobody is minding if we go through the technical info once again. Florida Tube Amp. Researching Amplifier circuits on the internet. 95 Buy It Now: TQP3M9008 LNA 13 50MHZ 4GHZ RF Low Noise Amplifier. com 435 S PACIFIC ST SAN MARCOS, CA 92078. Mar 16, 2019 - Dave's 1625 Tube Radio, Tube Socket Detail Stay safe and healthy. Perfect for new types of high efficiency or full range speakers, the ZOTL10 produces a much lower hum than typical tube amplifiers, which can be much more. Get the guaranteed best price on Single Electric Bass Guitar Strings like the Ernie Ball 1625 Single Bass Guitar String at Musician's Friend. Features: • Operator appeal with an ergonomic handle featuring a diamond pattern grip. 2 x Pl= 2watts/transistor. Interest will be charged to your account from the purchase date if the promotional purchase is not paid in full within 12 Months. Quick View. Lots of links to pictures and data: 800 Watts: 60. Buyers of LED fluorescent replacement tube lights often ask if they can use a T8 sized LED tube in a T12 fixture. The 813 is a general-purpose transmitting beam power tube with thoriated-tungsten filament with a maximum plate dissipation of 125 watts. This will aid in keeping the stoma tract from closing. 2X Match Vintage Ken-Rad Military Jan Ckr 1625 VT-136 SC961A Radio Amp Tube 100%. You see when I was in high school, I was a member of an Explorer post that was into Amateur Radio. The oscillator is a 2E26 configured as an Electron-Coupled Colpitts crystal Oscillator, which is capacitance coupled to the modulated RF amplifier. 0 inches) Fuel capacity: 22. We are currently working on making our websites more accessible. 00: MA : May 12, 2020: 5 : FOR SALE: Primaluna Dalogue Premium Amp with 2 tube sets: USD $2500. DANGER! HIGH VOLTAGE!. The speech amp/ modulator could be built from a 1625 as well since you are into them. THIRD STAGE:. See full list on robkalmeijer. ALWAYS have a spare G-tube, like the AMT’s MiniONE ® Balloon Button, to place in the stoma tract that is similar in size to your G-JET ® device. 25 quarts) Other specifications; Color options: Deep Jade Pearl, Amber Whiskey, Cosmic Blue Pearl, Hard Candy Black Gold Flake, Hard Candy Gold Flake, Vivid Black, Black Denim, Charcoal Denim, Velocity Red Sunglo. Sound quality is not as rich as the big brother models. The baby of the transcription players. Building your own tube-type HF amplifier, doing it "The Right way". Using the circuit as shown with an input of around 0. A musical instrument pickup with electrostatic interference (ESI) shield that reduces audible ESI noise in an audio output signal sent to an audio amplifier. Model 1200A225 RF Amplifier The Model 1200A225 is a solid-state, selfcontained, broadband amplifier designed for applications where instantaneous bandwidth, high gain and linearity are required. The Stancor A-3894 125-watt modulation transformer was about $36 in a catalog. Make Offer - Vintage 7pin U7B Vacuum Tube Socket For 1625 FU-25 6A6 53 59 826 832 Panel Mount 2PCS 7PIN B7A Vacuum Tube Sockets For 6C33 FU29 829B 832A 826 TM-30 GU19 TT25 $11. This will aid in keeping the stoma tract from closing. It uses a 12J7 driver, 1625 output tube, OD3 and OC3 VR tube regulation for the screens and a 5Z3 rectifie. 7 pin ceramic plate style - 1625, etc. Tap the tubes again as you go and listen for the ringing. Light Weight Designed and Highly Heat Resistant. It's a fairly powerful SE amp that works very well. 95 Time Remaining: 36m Buy It Now for only: $29. The triode is quite the linear device with the. A matching Tube Amp for NAD M51? How to test. Bossed mounting holes and recessed rivets allow sub-panel mounting. 00 McIntosh 240 McIntosh 240 amplifier $3,495. ” In fact, some people even feel the whole topic is a waste of time, arguing that matched tubes “kill the mojo” of what makes a tube amp sound special. 2A3 SE; 1625 PP; Dynaco 6v6 Push-Pull tube amplifier; Other. MP-402 MK2 FU25 1625 Tube Amplifier. For 7pins tube: 1625 Working Voltage: 1500V Contact Resistance >0. Isolation @1625+/-5 Min. 3 x 92: for 0. We offer a wide range of ballast by-pass (direct wire) or ballast compatible linear tubes to fit all your LED retrofit projects. ca MP-303 is our newly 291760962037. Unlike the 71a, that ¾ of a watt comes with quite a bark in the Darling circuit. 3 x76: for bare fiber S10 Diam. Their lower power means than you are either restricted to a small number of very high sensitivity speakers or that you double up and use more amps. We offer a wide range of ballast by-pass (direct wire) or ballast compatible linear tubes to fit all your LED retrofit projects. Looking for CENTURY 1/5 hp HP Room Air Conditioner Motor,Permanent Split Capacitor,1625 Nameplate RPM,208-230 Voltage,Fr (4UU24)? Grainger's got your back. Bob published his circuit in Sound Practices, and since then a wide variety of these amps have been produced and enjoyed by enthusiasts all over the world. This equipment is a highly sensitive vacuum tube voltmeter which accurately measures ac voltages. Other details are exactly same for both the vacuum tubes. Please check out the customer focused policies below. All amps are SE. 100Pcs 7Pin Ceramic Vacuum Tube Sockets Valve Base For 1625 59 6A6 Audio Amp. It can produce 75W per channel into 8Ω and 4Ω. 6v filament. com ,the Leading Trading Marketplace from China. Sometime back in the early 1990's an old Ham operator that was a friend of mine gave me this Knight-kit Linear-deluxe mono tube amp, which I stored away and never used. Please see the substitutes at the top of the page for more details. Shop through interconnects in the marketplace on Audiogon, the High-end Audio Community. 4076 + kp = 593. dB 50 Operating Temperature °C -40 to +85 Storage Temperature °C -50 to +85 S9 Diam. 00 Cab Air Filtration System,. Apr 28, 2019 - Dave's Homemade Radios Crystal Set #58, is changed to a one 1625 tube radio before your eyes. If you are looking for a tube amp it means you already know what you are looking for. Tortran vacuum tube amplifier transformer. All hand tig welded for smooth high quality welds. 12HG7 pentode driver, parallel 1625 output tubes into a 2500 ohm Hammond 1627SEA, a real beast of an output transformer. It has jacks for connecting a key and a microphone and 5 cable connections. Right - Earlier Model. So I'd reckon this would have similar output as a 12 tube D&A Phantom. power cord. National vacuum tube plate cap for 807, 1625, 5933 and other tube with 3/8" top caps $ 8. This is a fantastic sounding amp and nails the classic Fender tube amp tone. Back to Tube Guide Index. No Interest if paid in full within 12 Months* On any purchase made with your Alto Music credit card January 1 – December 31, 2020. The TAD 7025-S is a faithful reproduction of the legendary original Mullard ECC83 valve which was made in England until the late 1960s. It ships in its original box with test results. Vtg McIntosh MC-240 Stereo Amplifier / Amp in Excellent Cond (18 of 100) $1,625. Analog Laboratory using National Institute of Standards registered gear. You might want to switch them around and use the newer and likely less powerful amp for the rears and the older one for the front channels. The 807 I think is a functionally identical tube apart from the filament voltage and base. V (V) = P (W) / I (A). 9mm loose tube. Florida Tube Amp provides repair, mods and servicing for tube and solid state guitar amps. For class C telegraphy operation at 80 MHz, plate voltage and input should be reduced to 80 % of maximum ratings; at 125 MHz to 55 %. Nobsound Official Store has All Kinds of Nobsound HiFi Stereo Full-balanced Input / Output Dual Core Low Distortion Headphone Amplifier TPA6120,Nobsound HiFi Bluetooth Vacuum Tube Amplifier Stereo Audio Class AB Power Integrated Amp Music Playerwith USB/SD Card Play,Nobsound Mini USB DAC Audio Decoder HiFi Stereo Class A Headphone Amp OTG Black Amplifier With 24V Power Supply and more On Sale. This is not my first 1625 radio. Addeddate 2014-04-15 18:00:31 Identifier RCA_RC-30_1975 Identifier-ark ark:/13960/t5gb4q77p Ocr ABBYY FineReader 9. This bow cover is constructed out of gray colored canvas and measures approximately 87" W x 67 3/4" L ove. The two-tube regenerative receiver shown in Figure 1 is made from old radio parts of the 1930s and features a pair of #30 filament tubes with 3 volts on the filaments and a B+ supply of six 9-volt transistor radio batteries connected in series. Home / JungSon Audio CD Player & Amplifiers / JungSon V-99 Class A JJ KT88*4 tube Amplifier Hifi Push-pull Intergrated Amplifier $1,625. Units can be stacked vertically with recessed stacking pads. Call or text (662)315-1625. The output tubes are cheap and plentiful, long lasting, and MUCH better made than any current production tubes. The 1625/VT165 is OK too, as beging the 12 V. MP-701 MK2 Tube Preamp Pre Amplifier. Great sounding 10 watt SET amp in very good condition, used sparingly. I know it was built in Elkin NC. We carry Baldor inverters, Glentek motors/drives, NSK ballscrews as well as the most common breakdown parts for your machine. This base reference gives a quick way to find which tube used the same pin connections. One could simple look them up in a tube manual, but in 1974 I used a amplifier using 4 1625 tubes in grounded grid, driven by my SB-102. National vacuum tube plate cap for 807, 1625, 5933 and other tube with 3/8" top caps $ 8. 6 amps, 64v at 0. Light Weight Designed and Highly Heat Resistant. THE BANDIT Rx Pre-Amplifier. This is a two year old hand-built Inspire "Sweet 807" single ended triode power amplifier. Shop through interconnects in the marketplace on Audiogon, the High-end Audio Community. Yep - Lots more information around on tube amps for sure. ,Cleveland,OH44117-1199 • 216. Choose top quality brands AC Delco, Standard Motor Products. Comes with shown tubes and box. It may be used with full input up to 60 MHz. Our spacious RV sites offer full hookup service, or water and electric sites with 20-/30-/50-amp electric available for your convenience. My 813 Linear Amplifier Project Actually this rig came back to haunt me. We cover most of the basics on how to choose LED tube lights for your application here but customers are often confused after purchasing when they receive an LED that is marked as T8. This is high output power push pull tube amplifier employing eight legendary FU25 (1625) power tubes. 1625 (2) 24A (1) 26 / 226 / 326 (9) 27 tube socket (19) HiFi accessories (26) EMPTY VACUUM TUBE BOXES (20) Amplifier Convert Socket (30) Other (208) Hide all. 6 V heater and a 7-pin base. My buddy says the war was won with these tubes. The faux-wood case hides a hybrid of the modern and the ancient. In the early 60's Sylvania published a Tube Manual with a back section devoted to basing diagram references. If you find that a circuit breaker trips or a fuse blows when you plug in a space heater, you should try another circuit with heavier wire and a larger circuit breaker amp rating. I chose the 1625, for no other reason than curiosity of how this tube sounds, plus it has a neat shape. This equipment is a highly sensitive vacuum tube voltmeter which accurately measures ac voltages. Working on a project? We know that's why you're here. 875" c-c mounting ears. 70 litres (6. ESC (Electronic Service Center) Elkin RF Amplifiers Documentation Project CBTricks. The underside of the chassis is shown in Figure 6. This tube was used in the Dynaco Mark III and Sunn amplifers. Louis - Here is there 1950 catalog KG7TR HB-600 Power Amplifier Central Electronics Radio Transceiver Unobtanium electronic parts - parts that are no longer available 813 Transmitting Tube Antek, NJ Transformers Audio Transformers 20K to 600 Ohm. 1 user review. For 7pins tube: 1625 Working Voltage: 1500V Contact Resistance >0. Whether it's for a fresh paint job, relaxing patio layout or new appliance, we'll help you find what you need. The speech amplifier is a 6AU6 providing 155 gain followed by a 12AU7 configured as a self-balancing phase-inverter. Tube amps also require more maintenance, such as swapping out the tubes every once in a while which can be expensive. Skip to main content Skip to footer site51273887998386 site512747416120802636 New 102035 Ernie Ball 1625 Single Bass Guitar String site51273887998386. In the mid 1970's I built a Tiny Tim linear amplifier from an article by Russ Covington in the August 1971 issue of 73 magazine. Tube Amps; Vox; AC30 6/TB; Images + AC30 6/TB, Tube Combo Guitar Amp from Vox. In the early planning for this project I procured a pair of 5 volt/10 amp control transformers (Stancor P-6135). 2X Match Vintage Ken-Rad Military Jan Ckr 1625 VT-136 SC961A Radio Amp Tube 100%. The T8 LED tube is the perfect solution to replace aging T8 fluorescent and T12 tubes. We also have a risk free in home trial offer. One could simple look them up in a tube manual, but in 1974 I used a amplifier using 4 1625 tubes in grounded grid, driven by my SB-102. As Such my first recommendation would be that you take a look at the recent SE ATS25/807 two stage amp thread and make the appropriate changes for the heater voltage and the base pin out. com in a single category. Fr-sf-2-11kp-c Fr-sf-2-11kp - $1,950. 6 amps, 64v at 0. Bob published his circuit in Sound Practices, and since then a wide variety of these amps have been produced and enjoyed by enthusiasts all over the world. All Guitar and Bass Amps; Amp Heads; $ 1,625. I made a short video showing this radio in action. recently purchased a 12 tube Elkin Amp and would like to know the specs on this amp. 28 OP Amp Dual GP R-R I/O 5. This may be possible for an experienced DIYer. Introduction This page provides information on the design and construction of a 144 MHz high power amplifier using a Russian VHF triode GS35b. " Tube tests as new. The regenerative stage is first, followed by a transformer coupled audio amplifier stage. mkarikom Mar 28, 2016 [Review] FiiO K5. Connect the newer one so it goes from your soundcard's rear channels to the newer amp's front channels. DIY Audio Home "807" Push-Pull amp (5B/254M tubes driven by the Push-Pull driver board) (Click on the photos for full-size images) This is a pair of monoblock amplifiers that I built using the Push-Pull driver boards (described in more detail here). 6T9 Tube Amp Sound I played the new amp without NFB and with to determine the best sound. XLAXX,Some one must have put the low pass filter on it. By selecting the best tap, I feel that I get the most from this circuit. 1625 mm (64. A bad tube will sound loud no matter what channel it’s on. 00: NH : May 12, 2020: 6 : FOR SALE: Audio Research D125 Tube Amp Price to sell: USD $1625. Describes various pin voltages and different operation modes. National vacuum tube plate cap for 807, 1625, 5933 and other tube with 3/8" top caps $ 8. 6 V heater and a 7-pin base. 2601 Spenwick Drive, Houston, Texas. 00 shipping. 1pc Shuguang FU25 Electron tube replace 1625 Valve For HIFI Vacuum Tube Amp DIY. We also have a risk free in home trial offer. ) No real difference in the circuits if it a conventional regen, A regen is just a osc down on power getting a boost from the antenna signal. 3 x76: for bare fiber S10 Diam. I could not find a table rating of required grid power for the 1625 in Class C, but I did find a rating for the 807 (table V30 at the back of the handbook). Toll Free 1-866-681-9602 • Local: 905-681-9602 • Fax: 905-631-5777 • Email: [email protected] RigExpert AA-54 Excellent Analyzer: K6TU Propagation The premium prop solution: RigExpert AA-170 Excellent Product and Service: Icom Service Center Michigan (SAR Technical Services, Inc. P S 0 P 4 O N U S O 3 N R. Discover what audio enthusiasts are saying about Amps Preamps. One of the brand names I work under is "retro-thermionic". Johnstone Supply is a leading wholesale distributor for multiple leading brands of HVAC/R equipment, parts and supplies available and in-stock at local branches. MP-701 MK2 Tube Preamp Pre Amplifier. DIY Set No Tube :option is just a DIY set of all components, transfors, chassis, bottom plate, but without tube, you need use your tubes to work with it FU-25 chinese tube is equivalent to USA 1625 top cap tube, and 1625 is a 12voltage 807 tube, it's can NOT be replaced by 807, but you can use 1625 tube. This rugged tube also found a home in the '59 Fender Bassman and servo amplifiers used in B-52 bombers. 807 requires 5 pin socket and 1625 needs 7 pin socket. Rectification is via a 6CA4 full wave rectifier. The 6L6 was an American-designed tube to circumvent the patent Philips held for their pentode design. No interest if paid in full within 12 months and tube versions. The voltage V in volts (V) is equal to the power P in watts (W), divided by the current I in amps (A):. My 813 Linear Amplifier Project Actually this rig came back to haunt me. Frequency is performed with three buttons through PIC16F84 microcontroller. Please click on image for extended specs. It includes experimental data with tables, and is quite informative. A nuvistor is a miniature vacuum tube in a thimble sized metal case. Due to better availability in the USA (albeit under various pseudonyms, for example 5881) many American amp builders used this tube for their amps. There are a lot of 1625 tubes out there which would also be a good low cost choice. 6T9 Tube Amp Sound I played the new amp without NFB and with to determine the best sound. This rugged tube also found a home in the '59 Fender Bassman and servo amplifiers used in B-52 bombers. Addeddate 2014-04-15 18:00:31 Identifier RCA_RC-30_1975 Identifier-ark ark:/13960/t5gb4q77p Ocr ABBYY FineReader 9. 3 groups of RCA. Good memories. The output valves are confusingly drawn as tetrodes; in the EL84 the suppressor grid is internally connected to the cathode, so presumably it was the. This bow cover is constructed out of gray colored canvas and measures approximately 87" W x 67 3/4" L ove. 3" tube compatible with oem and after market exhaust Extra thick 3/8 flanges hand tig welded to resist warpage and cracking All necessary gaskets and harware are included as seen in the picture Designed for oustanding torque and hp gain. Nuvistors were also produced in Europe (by Philips/Mullard, Siemens and Lorenz) and in Russia. This one is model 8301 stereo single ended amp with EL84/6BQ5 outputs, each driven by individual triode sections of a single 6EU7 preamp tube. The CV181-T/2 Psvane Reference MarkII T-series  get shipped as factory matched pair. This is all about finesse, as the power output of this tube is only 3/4 of a watt! This is built on a hammertone-finished steel chassis, and features volume control and headphone…. MP-S1 MK3 Bookshelf Speaker. model: fan size: hp: volts: amps: speed: rpm: airflow capacity - cfm: framing dimensions: weight (lbs) 0" sp. Product Model. ESC (Electronic Service Center) Elkin 4 Tube Base (1625 Version) Documentation Project CBTricks. The recessed mounting of the tube sockets can be seen here. Sort by Display. As fas as the time frame,i would say late 70's when or about they were originated. Take a quick look at the schematics posted there and see what you think. Heater-cathode type used as af power amplifier and modulator and as rf power amplifier and oscillator. One of the brand names I work under is "retro-thermionic". It can be used as a direct replacement to standard 6SN7 or…. Making and tuning 6v6 push-push pull amp using the Chinese PCB and a bit modified original schematics. The first nuvistor to be produced by RCA was the 7586. It uses a WWII-era oscillator triode, the 1626, as an output tube. The filaments of the 813s require 10 volts at 10 amps total. Amp Research - $1,899. Tube shows no plate colour/red plating when operated at maximum ratings. Continues to handle 16 inch records, but has a much smaller tube amplifier. Add to Compare. It's super cool and I would never sell it, but I am primarily playing bass right now and I can't justify keeping this amp, my V-4B AND my SVT. Please see the substitutes at the top of the page for more details. 6F8G 6C8G To 6SN7 6SL7 Vacuum Tube Amplifier Convert Socket Adapter. The NOS tube and the Lundahl LL1935 output transformer ultimately made the cut, along with selected US-designed electronics and overseas-sourced parts. 725 + kvb = 11210. Shop Mahindra Max Tractors and find your local Mahindra dealership today! Mahindra Ag North America is the #1 selling farm tractor in the world by volume. Sort TORK 40 Amp 120-Volt to 277-Volt SPST 24-Hour Digital 1 Channel Timer Switch in Gray. 4 Example of. 4 Nominal 3. Note: one tube does not have support rods so may have been a civilian 1625. Sams' index goes back to 1946 and a majority of tube amplifiers & tuners made for consumer use between 1946 and 1970 have appeared in Photofact folders, as do most tube radios, consoles, intercoms and TV sets (with some major exceptions, like Fender guitar amps). That grid power rating is 0. Then, from inside the tube, he starts producing silks, multicolor streamers, flowers, etc… Classic magic, very easy to do. The 140 Amp, 180 Amp and 220 Amp guns are perfect for farm, garage, hobby/DIY, artistic metal working, job shops, and maintenance and repair applications. 60 Amp NON-FUSED Disconnect Box w/RSH-50. 4 Nominal 3. For best viewing experience use Microsoft Internet Explorer v9/10/11, Microsoft Edge, Google Chrome or Mozilla Firefox. A 1625 tube is the same as a 6LQ6 for plate dissipation, about 30W per tube. MP-402 MK2 FU25 1625 Tube Amplifier. Broan-NuTone Under-Cabinet Range Hoods. It sounds very transparent and dynamic with excellent sonic details. Heater-cathode type used as af power amplifier and modulator and as rf power amplifier and oscillator. I found the amp sounded much better with NFB. 99 per tube We also have other USA brands all manufactured in the 1940's during WWII! Brands may vary from National Union. Building a racecar chassis, check out the DS-1625T-R600. In Class B amplifier for a 10 Watt output using 2 X transitor pushpull type will have efficiency 78. Unlike the 71a, that ¾ of a watt comes with quite a bark in the Darling circuit. 807 and 1625 Valves. This is an. The sound is incredibly full, meaty, but it is also detailed and nuanced in spite of the old, cheap DAC chip it uses. Circuit is pretty straight forward. Tube 1625 or Röhre 1625 ID5831, Beam Power Tube, 7-Pin-Base U7B = medium, old, USA and Power/Output shown. • Handle that runs cooler than comparable guns because there are no brass block inside the handle,. Twin Acres Dr. The 12AT7 matches sonically speaking perfect with the EL34/6CA7. If the heated filament inside the tube glows orange like a setting sun, it's usually a sign that the tube is healthy. Amp Research Powerstep Xl Running Boards For 2014-2019 Chevrolet Gmc 1500-3500. (419) 872-2364 - Used Tig Miller Welder For Sale. The glowing tube, the single ended tube - it's enough to make an audiophile cry with tears of joy. Tube amps also require more maintenance, such as swapping out the tubes every once in a while which can be expensive. mkarikom Mar 28, 2016 [Review] FiiO K5. Triode connected KT-66s gave this amp the low-distortion loadline of triodes with some of the gain and efficiency of beam power tubes. Amp Research Powerstep Xl Running Boards For 2014-2019 Chevrolet Gmc 1500-3500. ESC (Electronic Service Center) Elkin 4 Tube Base (1625 Version) Documentation Project CBTricks. A built-in bias supply, using a voltage. You might want to switch them around and use the newer and likely less powerful amp for the rears and the older one for the front channels. Building a racecar chassis, check out the DS-1625T-R600. Find a great deal on high-end audio equipment or music for sale. This is to connect to an external audio amplifier. 6N8P x 2, 6N7P x 2, 6E2 x 2, 5Z3PAT x 2. The 1625 JAN tube is electrically equivalent to the 807/ATS25. All amps are SE. This thing has 2 stages each with a transistor (s9014) and 2 drivers (TIP 41C in mine) coupled by a coupling transformer to the input stages. The first is the filament transformer whos job it is to supply correct volt and amp ratings to the tube filaments and provide a path for the HV negative line to reach the zener diodes and resistor which effectively shuts down the tubes when idle that control tube bias. Nuvistors were also produced in Europe (by Philips/Mullard, Siemens and Lorenz) and in Russia. 00 + shipping). • Handle that runs cooler than comparable guns because there are no brass block inside the handle,. Nobsound Official Store has All Kinds of Nobsound HiFi Stereo Full-balanced Input / Output Dual Core Low Distortion Headphone Amplifier TPA6120,Nobsound HiFi Bluetooth Vacuum Tube Amplifier Stereo Audio Class AB Power Integrated Amp Music Playerwith USB/SD Card Play,Nobsound Mini USB DAC Audio Decoder HiFi Stereo Class A Headphone Amp OTG Black Amplifier With 24V Power Supply and more On Sale. 1625 tube amp. Turn the knobs on your amplifier or other device to activate each tube. It boosts the input, to replenish the losses in the positive feedback and transfers it to the last stage. fed from the cathode of final tube, should be "round bulk voltage" i. Please message me with any other questions! +4. It is very common where tube amps are used. version of the 807. 3 volts for filament at 0. power cord. The changes I made over the original 1625 amp were to 1) redo the output stage--make it pentode connected (rather than UL), 2) add a full-blown EFB output stage regulator, and 3) swap out the 6DJ8 frontend tube for a 12AX7, and along with that, add more feedback (18 dB). 2X Match Vintage Ken-Rad Military Jan Ckr 1625 VT-136 SC961A Radio Amp Tube 100%. com in a single category. Includes 2 protected outlets for Daisy Chaining. The 1625/VT165 is OK too, as beging the 12 V. this is a stereo tube amplifier made from scratch. 00: MA : May 12, 2020: 5 : FOR SALE: Primaluna Dalogue Premium Amp with 2 tube sets: USD $2500. The hybrid circuitry, originally created by Cayin, provides the perfect balance between tube and solid state electronics in an integrated amplifier. The two-tube regenerative receiver shown in Figure 1 is made from old radio parts of the 1930s and features a pair of #30 filament tubes with 3 volts on the filaments and a B+ supply of six 9-volt transistor radio batteries connected in series. pdf (39931 bytes), 1625. Items such as heater-fans, wipers and headlights use high amperes and, when you turn them on, your alternator has to adjust its output to meet the energy requirements. 1625 6146 5881 5933 7581 50C5 7408 1614 5591 5654 6CE5 6SJ7 TDA2822M Stereo headphone amplifier circuit. 5V 8-Pin MSOP Tube. Both tubes are equal in their characteristics except for base connection and filament voltage. The 1625 (VT-136) is an 807 variant with a 12. 5 amps, 195v at 0. K-16LS Stereo Integrated Tube Amplifier Kit ($299. I do have some inside info on the Elkin amp's but will discuss that only through e-mail if you're interested. It can be used as a direct replacement to standard 6SN7 or…. The Stancor A-3894 125-watt modulation transformer was about $36 in a catalog. Choose top quality brands AC Delco, Standard Motor Products. If the heated filament inside the tube glows orange like a setting sun, it's usually a sign that the tube is healthy. With Johnstone, you can stay current on product and technology changes, in addition to programs that make it easy for the contractor. 1625 Tube, select Beam Power Amplifier. I know it was built in Elkin NC. Heathkit kits, pictures, specifications, diagrams, schematics. • The tube can be shown to be empty also in between the productions. MP-401 MK3 EL34 KT88 Tube Amplifier. The Authority on Hi-Fi DIY. Guitar and Bass Amps. A stylish, contemporary enclosure allows. This rugged tube also found a home in the '59 Fender Bassman and servo amplifiers used in B-52 bombers. To find out how much power is needed by the 6146B, we can refer to the to the 6146B Data Sheet available on my 6146B Amplifier pages, the 6146B tube data sheets available on-line at Frank's Electron Tube Pages, or the RCA TT-5 Transmitting Tube Manual. If one is going to use tubes, an amp like this makes a lot of sense. Erica Synths Fusion Box. That is a big difference! I wonder how long the tubes lasted when the 1625 was used versus when the 837 was used. I used the "Genelex" KT66 in a pentode SE amp and they were divine. 12S Lipo operation and 120 Amp HV speed controller minimum. The modulator has two 1625 tubes and a VR150-30 tube and a 1205-GT tube. NOS Tube Specifications: Chinese/Russian Tube Substitutes: Antique Tubes: 6L6 / KT-66: Fender Amp Tubes: Tubes We Buy: Links: FAQ: Euro Tube Codes: Telefunken Tube Codes: How to Order: Order Online With PayPal: Ordering Tips: Gift Certificates: Our Ebay Store: European CV1-1999 Tube Substitutes: Tube Accessories & Books: Tube Shirts: Speaking. The majority of glowbug transmitt. 2601 Spenwick Drive, Houston, Texas. NEO Instruments. com ,the Leading Trading Marketplace from China. Making and tuning 6v6 push-push pull amp using the Chinese PCB and a bit modified original schematics. recently purchased a 12 tube Elkin Amp and would like to know the specs on this amp. If the heated filament inside the tube glows orange like a setting sun, it's usually a sign that the tube is healthy. Browse our Landscape Lighting products, including LED Flood and Spot Lights, Low Voltage Incandescent Bulbs, Miniature Bulbs, Xenon and Halogen Light Bulbs, MR-11 and MR-16 Bulbs, Bug Lights, Colored Bulbs, Dusk to Dawn Controls, and more. 1625 Tube, select Beam Power Amplifier 1-800-RFPARTS (1-800-737-2787) 1-760-744-0700 (USA) ORDERS: [email protected] 3 x 92: for 0. It has an international octal base (indicated by the '3' in the part number) and is found mainly in the final output stages of audio amplification circuits and was designed to be suitable as a series regulator by virtue of its high permissible voltage between heater and cathode and other parameters. Guitar and Bass Amps. Neighborhood information about all US cities and zip codes - home values, school ratings, crime, demographics, sex offenders, weather and property reports. This rugged tube also found a home in the '59 Fender Bassman and servo amplifiers used in B-52 bombers. ALWAYS have a spare G-tube, like the AMT’s MiniONE ® Balloon Button, to place in the stoma tract that is similar in size to your G-JET ® device. I name all my amps and preamps etc. • Handle that runs cooler than comparable guns because there are no brass block inside the handle,. View all Tube Guitar Heads. Analog Laboratory using National Institute of Standards registered gear. So just went through my local Music go round and the only amp they had plugged in was a Blackstar HT 100, and I typically stay away from things like this, line 6 amps, crate, things of that nature. We also have a risk free in home trial offer. Radios Radio Design High Voltage Ham Radio Tube Waves Amp Technology Rain One Tube FM Super Regen Receiver - 12BH7A 12V DC Radio One Tube FM Super Regen Receiver - 12BH7A Tube Radio works with 12V DC. If the heated filament inside the tube glows orange like a setting sun, it's usually a sign that the tube is healthy. A stylish, contemporary enclosure allows. Describes various pin voltages and different operation modes. has announced that the Dynasty® 200 AC/DC GTAW/SMAW and Maxstar® 200 DC GTAW/SMAW power sources now feature Blue Lightning™ technology to help provide consistent high-frequency arc starting from 200-amp to microthin, 1-amp applications. Shop through interconnects in the marketplace on Audiogon, the High-end Audio Community. 00 + shipping). 6 V heater and a 7-pin base. That is a big difference! I wonder how long the tubes lasted when the 1625 was used versus when the 837 was used. 845 Page1, Page2. Return for any reason post marked within 2 weeks after you receive the amp(s) for a full refund, no restocking of the usual 25%. MP-S1 MK3 Bookshelf Speaker. This is a WWII military MD-7/ARC-5 & DY-8/ARC-5 modulator with power supply for the ARC-5 transmitters. Sometime back in the early 1990's an old Ham operator that was a friend of mine gave me this Knight-kit Linear-deluxe mono tube amp, which I stored away and never used. 7 pin ceramic plate style - 1625, etc. “Tube matching” is a controversial and complex topic, and there is no consensus regarding “what is best. Review By Rick Becker In our last episode of High Efficiency Adventure, the review of the Zu Audio Union loudspeaker, I spoke with delight about the 2A3 Classic Mk2 power amp mated with the very high efficiency Zu speaker. • The tube can be shown to be empty also in between the productions. The underside of the chassis is shown in Figure 6. So I would expect the answer to your question to be "no. Browse our Landscape Lighting products, including LED Flood and Spot Lights, Low Voltage Incandescent Bulbs, Miniature Bulbs, Xenon and Halogen Light Bulbs, MR-11 and MR-16 Bulbs, Bug Lights, Colored Bulbs, Dusk to Dawn Controls, and more. Radio tubes are valves. If you are looking for a tube amp it means you already know what you are looking for. Order 1625 / VT-136 vacuum tubes online, in stock and ready to ship! Find reviews, data sheets and specs to upgrade your tube amplifier. FADAL Parts Experts, KMAC-Parts is your supply house for new, used and remanufactured parts for Fadal machines. Model Number: Description: Notes: Picture: Specs: Info: Docs: 1st Year: Last Year-Accutrac Turntable. This tube was used in the Dynaco Mark III and Sunn amplifers. Audio Output Pentodes Stock List. In the early planning for this project I procured a pair of 5 volt/10 amp control transformers (Stancor P-6135). DIY Set No Tube :option is just a DIY set of all components, transfors, chassis, bottom plate, but without tube, you need use your tubes to work with it FU-25 chinese tube is equivalent to USA 1625 top cap tube, and 1625 is a 12voltage 807 tube, it's can NOT be replaced by 807, but you can use 1625 tube. To a typical engineer, this seems like a really shabby way to do things, but what happens, is that notes 'swell' as the initial attack drains off a lot of the energy stored in the filter caps, which is then built up again as the note sustains. Five secondaries 390v C. The amplifier is air-cooled using internal selfcontained liquid cooling for high performance and reliability. favorite this post Sep 4 Nash T-63 $1,625 (Johns Creek) favorite this post Sep 3 50w or 100w all tube amp head WANTED $0 (greater metro Atlanta area). View & download of more than 2983 Briggs & Stratton PDF user manuals, service manuals, operating guides. Miller Electric Mfg. Put the tube into your guitar amplifier, tester, or other tube-using machine. I name all my amps and preamps etc. recently purchased a 12 tube Elkin Amp and would like to know the specs on this amp. drawing grid. Extension cord amp ratings are shown on the package and is determined by the wire diameter and length. It used four 1625 tubes or 837 tubes in GGThe manual says that the 1625 tubes are modified. 4 Example of. 01Ω Insulation Resistance <10000MΩ Useful Life: 200 times Package includes: 7pin Ceramic vacuum tube socket valve base Fr 1625 audio amps DIY parts. pdf (55028 bytes) Bold designators are close or identical, Italic designators are different ratings, different pinouts or different filament voltages. Production: Manufacturer: Mahindra: Original price (USD) $18,200 (2018 gear ) $23,890 (2018 hydro ) Mahindra 1626 Engine:: Mitsubishi 1. Comes with shown tubes and box. Back to Tube Guide Index. Indoor Extension Cord with Safety Covers - 3 Outlets - On/Off Foot Tap Switch - 9 ft. Tube DataSheets. It can be used as a direct replacement to standard 6SN7 or…. pdf (39931 bytes), 1625. Rated Input at Rated Load: 50 / 60 HZ, 230 Volts - 284, 460 Volts - 142, 29. 6 V heater and a 7-pin base. Because of its high power sensitivity and high efficiency, the 8121 produces a large power output when operated at relatively. - Weight: 630 g - Current Draw from Mains: 50 mA - Power Supply: M 902 PSU - 7-Pin Female XLR Input, 3-Pin Male XLR Output - Cable: M 803 - 7-Meter (23') Tube Mic Cable with 7-Pin XLR Connectors - Mount: M 703 - Shock Mount, M 782 - Stand Mount. Broan® 30-Inch Convertible Under-Cabinet Range Hood w/ Easy Install System, 220 CFM, Black. MP-402 MK2 FU25 1625 Tube Amplifier. I found the amp sounded much better with NFB. 721 + ex = 1. If you find that a circuit breaker trips or a fuse blows when you plug in a space heater, you should try another circuit with heavier wire and a larger circuit breaker amp rating. 2601 Spenwick Drive, Houston, Texas. Features: • Operator appeal with an ergonomic handle featuring a diamond pattern grip. All Guitar and Bass Amps; Amp Heads; $ 1,625. Extension cord amp ratings are shown on the package and is determined by the wire diameter and length. CXSE Series. Making and tuning 6v6 push-push pull amp using the Chinese PCB and a bit modified original schematics. 1"DIA x 3"H, 14 lbs. The regenerative stage is first, followed by a transformer coupled audio amplifier stage. Features: Firm and durable,shockproof, excellent and close contact,transmit the Hi-Fi signal to the sound equipment better , without welding and convenient use. The 1625 Vacuum tube is a heater-cathode type used as an AF power amplifier and modulator and as an RF power amplifier and oscillator. Tortran vacuum tube amplifier transformer. Price: $80. 500-600W PEP on a good wattmeter. fed from the cathode of final tube, should be "round bulk voltage" i. 2019 - 12sl7 tube pair Fivre nos 1625 12sn7 6sl7 6sn7 gt 12au7 12ax7 b36 b339 valve #Fivre. SN74HCT74N – Flip Flop 2 Element D-Type 1 Bit Positive Edge 14-DIP (0. NIKKO TRM 40LA; Transistor Tester (MTester) Dummy Load; Ducky One Keyboard; About; Tube Amps. musicalparadise. dB 15 13 Longer Wavelength Channel nm 1625+/-5 Insertion Loss Max. All Guitar and Bass Amps; Amp Heads; $ 1,625. Our website shows a great number of original paintings that you may directly purchase online or you could also contact us for more new designs. This is a single-ended triode amp that I built using the 813 transmitting pentode, connected as a triode. IRF510 push pull amplifier. 0 Ppi 300 Scanner Internet Archive Python library 0. The 6SL7 and 6SN7 tube always rates high for new amp construction. That was 5 5881 tubes in parallel SE per side. Features: • Operator appeal with an ergonomic handle featuring a diamond pattern grip. Convert Any Radio Into a Guitar Amp: Turn any radio into a guitar amp. " Tube tests as new. Using the circuit as shown with an input of around 0. I found I could work stations in about a 200km radius during the day with 5 - 10 watts, but at night I could work no one at all. 3 groups of RCA. The 813 is a general-purpose transmitting beam power tube with thoriated-tungsten filament with a maximum plate dissipation of 125 watts. As Such my first recommendation would be that you take a look at the recent SE ATS25/807 two stage amp thread and make the appropriate changes for the heater voltage and the base pin out. Units can be stacked vertically with recessed stacking pads. A bad tube will sound loud no matter what channel it’s on. We offer a wide range of ballast by-pass (direct wire) or ballast compatible linear tubes to fit all your LED retrofit projects. Like all Cayin components, the Cayin H-80A Integrated Amplifier is built in a heavy, solid chassis and comes with a full-function aluminum remote control. Hi/low gain switch allows for finer adjustment to gain and better versatility usage with the wide variety of IEMs and headphones. 1625 (2) 24A (1) 26 / 226 / 326 (9) 27 tube socket (19) HiFi accessories (26) EMPTY VACUUM TUBE BOXES (20) Amplifier Convert Socket (30) Other (208) Hide all. 1625 PDF File See also 807 (same except for filament & basing) 5654 (6AK5W) PDF File. 807 valve requires about 6. This one is model 8301 stereo single ended amp with EL84/6BQ5 outputs, each driven by individual triode sections of a single 6EU7 preamp tube. For class C telegraphy operation at 80 MHz, plate voltage and input should be reduced to 80 % of maximum ratings; at 125 MHz to 55 %. Layout: Here, you must decide if you want an "all-in-one, desk top" amp, or a "floor console", or a "two-piece" unit. The T8 LED tube is the perfect solution to replace aging T8 fluorescent and T12 tubes. pdf (55028 bytes) Bold designators are close or identical, Italic designators are different ratings, different pinouts or different filament voltages. Vavle rectification. The sound is incredibly full, meaty, but it is also detailed and nuanced in spite of the old, cheap DAC chip it uses. 6 V heater and a 7-pin base. Broan® 30-Inch Convertible Under-Cabinet Range Hood w/ Easy Install System, 220 CFM, Black. A good example of competent amplification transcending modest. For 7pins tube: 1625 Working Voltage: 1500V Contact Resistance >0. -You will need two 1/8" to rca cables. 3 groups of RCA. drawing grid. It uses a WWII-era oscillator triode, the 1626, as an output tube. Shop Mahindra Max Tractors and find your local Mahindra dealership today! Mahindra Ag North America is the #1 selling farm tractor in the world by volume. Each series of amps is generally based on a tube or a standardised form of construction with maybe different power tube selection. Some of the old hands in ham radio will be taken back to the "good old days," when it was the custom to operate on the available vacuum tubes by debasing them or sawing slots in the base. Back to Tube Guide Index. Buy a 1987 Dodge B150 Alternator Diode at discount prices. Details about 1pc Shuguang FU25 Electron tube replace 1625 Valve For HIFI Vacuum Tube Amp DIY Be the first to write a review. > >> Item Qty Part Number Br Unit Price. XLAXX,Some one must have put the low pass filter on it. - Length: 1,625 mm (63,98 in). 1"DIA x 3"H, 14 lbs. Discover our selection of bass guitar cabs 2x10. It's a fairly powerful SE amp that works very well. power cord. Used Kawasaki 50607-1129r05 Amplifier Welding 1jk-31,pm50csd060,htc00501 Gc. All hand tig welded for smooth high quality welds. The speech amp/ modulator could be built from a 1625 as well since you are into them. The hybrid circuitry, originally created by Cayin, provides the perfect balance between tube and solid state electronics in an integrated amplifier. 0 Ppi 300 Scanner Internet Archive Python library 0. Sometime back in the early 1990's an old Ham operator that was a friend of mine gave me this Knight-kit Linear-deluxe mono tube amp, which I stored away and never used. I know it was built in Elkin NC. 1 user review. That grid power rating is 0. 1625 : Output Tube : Power Pentode : Inquire : 1626 : Output Tube : Triode : RCA, Ken-Rad, Hytron : 1629 : Magic Eye Tube : RCA and other brands: 5654 6AK5 403B EF95. DIY Set No Tube :option is just a DIY set of all components, transfors, chassis, bottom plate, but without tube, you need use your tubes to work with it FU-25 chinese tube is equivalent to USA 1625 top cap tube, and 1625 is a 12voltage 807 tube, it's can NOT be replaced by 807, but you can use 1625 tube. We also have a risk free in home trial offer. 1625 Beam Power Amp Tubes RCA & National Union Tested OK Clean. In the early planning for this project I procured a pair of 5 volt/10 amp control transformers (Stancor P-6135). 70 Shield Shield cap Nozzle Swirl ring Electrode Water tube. The Heathkit SB-220 amplifier cooled two 3-500Z's with a pretty small fan. ” In fact, some people even feel the whole topic is a waste of time, arguing that matched tubes “kill the mojo” of what makes a tube amp sound special. Heater-cathode type used as af power amplifier and modulator and as rf power amplifier and oscillator. It uses a WWII-era oscillator triode, the 1626, as an output tube. Discover our selection of bass guitar cabs 2x10. ,Cleveland,OH44117-1199 • 216. Broan-NuTone Under-Cabinet Range Hoods. 12S Lipo operation and 120 Amp HV speed controller minimum. Skip to main content. High power tube amplifier for 144MHz using GS35b [From German]. A built-in bias supply, using a voltage. One of the largest online supplier of medical supplies & home medical equipment. recently purchased a 12 tube Elkin Amp and would like to know the specs on this amp. 1625 (2) 24A (1) 26 / 226 / 326 (9) 27 tube socket (19) HiFi accessories (26) EMPTY VACUUM TUBE BOXES (20) Amplifier Convert Socket (30) Other (208) Hide all. 12HG7 pentode driver, parallel 1625 output tubes into a 2500 ohm Hammond 1627SEA, a real beast of an output transformer. Center epoxy potted with 3/8" mount hole. The faux-wood case hides a hybrid of the modern and the ancient. 5cm) tall and has a diameter of 5″ (12cm). Please see the substitutes at the top of the page for more details. Sonically other tubes, like the 12AT7/ECC81, are a disappointment. 6 V heater and a 7-pin base. One could simple look them up in a tube manual, but in 1974 I used a amplifier using 4 1625 tubes in grounded grid, driven by my SB-102. 00: CA : May 12, 2020: 4 : FOR SALE: Audio Note Kit 1 300B Tube SET 8W Amplifier: USD $2250. 6, while the other two tubes operate at 6. Working on a project? We know that's why you're here. pdf (82848 bytes) 8/03TM Ferranti. A good example of competent amplification transcending modest. " Tube tests as new. As Such my first recommendation would be that you take a look at the recent SE ATS25/807 two stage amp thread and make the appropriate changes for the heater voltage and the base pin out. cord, in-line switch, ballast in head (1625-3045). The triode is quite the linear device with the. 28 OP Amp Dual GP R-R I/O 5. P S 0 P 4 O N U S O 3 N R. This is high output power push pull tube amplifier employing eight legendary FU25 (1625) power tubes. It sounds similar 6P3, but the performance to highlight some of it to the warrior's pride, the beauty of the gentle, refreshing flavor and form their own unique character. This is true even when the amplifier does not have a directly grounded grid. This link is listed in our web site directory since Tuesday May 13 2008, and till today "RF Amplifier basics" has been followed for a total of 1625 times. 00: MA : May 12, 2020: 5 : FOR SALE: Primaluna Dalogue Premium Amp with 2 tube sets: USD $2500. This amplifier without modifications will allow to use the GM70 and the 813 (FU-13) output tubes. Postwar, 1625 tubes flooded the surplus market, and were available for pennies apiece. V (V) = P (W) / I (A). 4 Example of. Review By Rick Becker In our last episode of High Efficiency Adventure, the review of the Zu Audio Union loudspeaker, I spoke with delight about the 2A3 Classic Mk2 power amp mated with the very high efficiency Zu speaker.