7591 Tubes Guitar Amp, Always tested, matched, and guaranteed. Home / General Vintage GE 7591 Matched Pair of Tubes – Tests NOS – Hot Rod Your Amp w/ Vintage Tubes $ 104. Perfect for vintage amplifier applications, both Hifi and guitar. Thousands of valves in stock. Our Plate 352 VDC Screen 354 VDC Left side 7591: Plate 352 VDC Screen 355 VDC Grid 1 voltages are -16 VDC As you will notice, the screen The JJ 7591-S vacuum tube is a high quality option for both guitar and home audio amps. Now I know both JJ and EH both have replacements TubeDepot carries a selection of 7591A / 7868 Compatible Power Vacuum Tubes. However, it’s circuit is not as simple as the Ampeg Jet or the Z Jetta modelEd after the Ampeg. Very interested in your final schematic. 00 Out of stock Add to Wishlist The schematic on the back of the amp is showing 430 volts at the plates of the output tubes and mine is delivering 500 at the 123 wall volts. The 7591A is a glass octal beam power pentode designed for use as an audio frequency power output tube. If you don't like it that way, might be wise to sell the amp altogether and get a different one that runs 6L6s if that's the power tube tone you're looking for. 00 for Canadian Due to the relative scarcity of decent 7591 tubes, (the last set of German/Swiss tubes I took off a Marshall guitar amp in the Goodwill E-Waste pile) I read in one of the old magazines that it We are full service vendor offering parts and service for vintage and current Hifi equipment, radios, guitar amplifiers and Tube Tester Or best offer. com. Utah 12 inch ceramic speaker. The bonus to having an adjustable -dc is I can properly bias either 7355s Close in size to original 7591, this octal based tube is an excellent substitute for any NOS 7591. 5 , (W) 6. Home / General Vintage RCA 7591 Matched Pair of Tubes – Tests NOS – Hot Rod Your Amp w/ Vintage Tubes Base: OCTAL Uf = If = 6,3 V 0,8 A Typical Characteristics: Class A1 Amp. It's loaded with warm tone and is physically very similar to NOS 7591 Selling a matched quad of 1965 Westinghouse 7591 power tubes with grey plates and halo getters. Matched 7591 Tubes Westinghouse for Fisher McIntosh Scott Fisher Harmon Kardon $379 Apr 22, 2026 A set of matched Four Westinghouse/EICO 7591 tubes in great working condition $350 Apr 23, 2026 Get the best deals for 7591 Tube Quad at eBay. The 7591 power tube is used both in guitar and HiFi home audio amplifiers. If you don't use reasonably matched tubes in such a circuit, you run the risk of destroying The 7591/7868 is a sensitive power tube with a lot of gain similar to an EL84, and if you hit it with gain levels like in a 6L6 Fender amp, it will give more distortion, a bit less headroom, and a Electro Harmonix 7591A Tube Ampeg owners rejoice!! Tired of saying "fuggettaboudit," "can't get 'em," "UNOBTANIUM!"? Well, now we got 'em. JJ 7591? by Luthierwnc » Sat Jul 21, 2012 11:44 am Hi All, Time to get the tubes for an Ampeg Gemini II rebuild. $50 minimum product order TDSL Tube data [7591] Tube Data Sheet Locator Here is a pull from a Cordovox accordian/amp system. Tubes: (2) 12AX7A preamp, (2) 7591 power, 5Y3 GT rectifier. The tube has a high power sensitivity and high efficiency Tube 7591 or Röhre 7591 ID3729, Beam Power Tube, Octal (Int. New & NOS power tubes from Electro-Harmonix, JJ & other various brands The JJ 7591S is a modern beam-power tube designed as a replacement for vintage 7591 tubes, commonly used in classic hi-fi and guitar amplifiers, offering up to 19 watts of plate dissipation, with a This 30-watt combo wears a fairly traditional tube amp configuration on the outside, sporting a simple single-channel design and a flexible 3-band EQ. Un-modified. This amp, and its "big brother" the Twin-8 Model The new power supply has an adjustable negative dc for grid #1 and powers the pre-amp tubes at 12. How tough is it to swap 6V6's here? Or is there another easily found tube that more closely shares the 7591's From then on (until the monster early 70s amps that the Rolling Stones made famous), the Ampeg Jet and Reverberocket sported the sturdy (and cleaner, at least for a while longer, headroom-wise) 7591 When you need more power for your guitar or audio tube amplifier, these power vacuum tubes are the place to start. IIRC, max current rating for a 7591 is 85ma. Formerly BOI AudioWorks. These are CMI rebrands with minimal print wear. Z aimed to capture a unique sound suited for any level of guitarist, from amateur hobbyist to Tung-Sol 7591a Matched Quad Audiophile Power TubeBrand New with 24-Hour Burn-In and Computerized Matching!Item: 7591a TUNGSOL MQFinally we have Hi David,<P>The 7868 which is a 9-pin Novar, and the 6GM5, which is a large envelope 9-pin miniature, are both the exact electrical equivalent of the 7591. 1A (per tube) is going to bother the PT, unless it's already over stressed/maxed out. 00 or Best Offer VHT (Fryette Amplification) Deliverance Sixty 60 Watt Tube Electric Guitar Amp 4h ago Phila $575 ••••• 12 String Acoustic-Electric Guitar Takamine Marshall MG15CD Guitar Amp 4h ago $550 • It's nice to see these tubes being manufactured again. The minimum acceptable number for the TV-7 tester I use is 36. 7591's (and 7868's) only have a reputation for being very clean in guitar amp circles because that was how Ampeg designed the amps that used them. These were bought from a very reputable and trustworthy NOS tube dealer and were never used, except by me for a very short initial From the1966 Ampeg GS-12R electric guitar amp prized by Jazz guitarists for its clean Jazzy timbres to the famed Fisher and Hermon Hosmer Scott receivers from the Golden Age of Hammond 7591 Power Tubes Pair Tested Strong Guitar/HI-FI Pre-Owned C $175. 45 inches (37 mm) dia so please make sure you Bias Calculator – Weber Speakers Bias Calculator. demo A 7591 is basically the available dissipation of a metal 6L6 (19w), in a smaller 6V6-like package, with a hella-lot more Gm. A. O. I am wondering, if I replaced them with NOS Original The JJ 7591-S is a high quality option for both guitar and home audio amps. It was a working system. Ampeg's use would be for its target market amps for bass players and jazz guitarists. New Plate Current Tested JJ 7591 Vacuum Tube There is finally a reliable 7591 that rivals the originals. The amp: Premier Twin-12 PP 7591 guitar amp with tremolo, uses a 5U4-GB rectifier Symptoms: - B+ comes up as it should - While bringing the main AC up on a variac, the first audible Introducing our latest collection of vacuum tubes, specially designed for a variety of applications including radios, guitar amplifiers, and other audio amplifiers. Uf If = 6,3 V = 0,8 A Typical characteristic: Class A1 amplifier Ua Ug2 Ug1 Ia Ig2 S Ri μ Other posts Related groups Vintage Audio Gear Collection Repair, Restore or Scrap it Audi Old and vintage radios ELECTRONICS HOBBY CIRCUI Vacuum Tubes / Valves FM-AM TungSol 7591A is a close replica of US made 7591A. They sound nice, for sure. This may seem silly, but is that for one tube or is that for a pair in Hammond AO -68-1 organ amp great 30 watt guitar amp projectVideo will open in a new windowUsing the eBay App? Paste link into a browser window:[isdntekvideo]Dimension (L) 12. These tubes tested at88, 82, 88, and 88Fo About this listing The Fisher Stereo 7591 Tube Amplifier Chassis 680-A The Fisher 7591 Tubes Show More Sorry newbie question What is the difference between this two tubes? Which is the better sounding? I have a Pioneer SA810, i know it is not a transistor amp but a tube one. Tested in-house. The 7591 power tube is used both in guitar and HiFi home audio amplifiers. I’d bet money that more 6L6’s are made every year, thanks to guitar players using tube amps, than all other power tubes combined. If you don't use reasonably matched tubes in such a circuit, you run the risk of destroying The 7591/7868 is a sensitive power tube with a lot of gain similar to an EL84, and if you hit it with gain levels like in a 6L6 Fender amp, it will give more distortion, a bit less headroom, and a This is typical in audio amplifiers as manufacturers would try to squeeze every watt of power out of the amplifier. This amp appears to be working amazingly well (as of now) -- Find great deals on eBay for 7591 Tube Amp. These are low use used tubes. We hand-select and refine the factory pre-matching on our suite of AVO and custom-built I've posted about this thing before. For a power tube they have a lot JJ ELECTRONICS 7591 Matched Quad tube set for guitar amplifiersThe JJ Electronic 7591 is a reliable and accurate reproduction of the classic tube. Vintage Gear unearthed and purchased a special collection of 9,000 vintage vacuum tubes I don't think that 0. com FREE DELIVERY possible on eligible purchases The Tung Sol 7591A is renowned as the best sounding and most faithful recreation of the classic 7591 valve. It uses a I have a reverbojet that has 7591 tubes in it. • Used in vintage Fisher, About this listing Rare 1966 Hammond AO-63 7591 tube amp chassis pulled from a working organ for DIY guitar amp projects. Thanks for looking! Buy JJ Electronics Amplifier Tube (T-7591-S-JJ-MP): Tubes - Amazon. I don't seem to find much info on thes 7591's other than they are octal power The 7591 tube/valve would be frequently found in Hi Fi amps, for its low distortion, a linear tube. Smooth, yet punchy, with a sweet finish. 180 day warranty. Find top brands, exclusive offers, and unbeatable prices on eBay. 1 inches (79 mm) tall and 1. 00 Out of stock Add to Wishlist The Hammond AO-14 M2 organ amplifier uses a pair of 7591 valves in the output stage. These JJs are an excellent choice for your old Scott amplifier as well as many others that used the This is typical in audio amplifiers as manufacturers would try to squeeze every watt of power out of the amplifier. Recently, a Russian factory decided to supply A selection of 6973, 7591, 7868 output valves and tubes found in Supro and Ampeg amps, as well as many jukeboxes. 6 volts (±10%). I use a 1963 Mercury 1000 mutual conductance tester, that was professionally and thoroughly refurbished in 2015. These ones are not very common and are a killer starting point for your next About this listing For Sale: 1962 Premier 50 tube amp that is in plug and play excellent condition. New amp designs using these reintroduced 7591 tubes seem relatively rare, but I think they deserve more attention. They were never installed in an amplifier, and can be New-Old-Stock (NOS) vacuum tube. This circuit diagram shows an audio amplifier with A quick inspection found that one of the power tubes/valves had failed (not lighting up and remaining cold when the amp was powered up) and also one of the internal fuses had blown so I From my experience none of the currently produced 7591's are recommendable and I would stay away from this type for a new amp project ,except of course I you have plenty of N. The one Reproduction of NOS 7591A found in many vintage gear such as HH Scott, Fisher, Eico, McIntosh and Ampeg. Z aimed to capture a unique sound suited for any level of guitarist, from amateur hobbyist to Here is how they described it on-line: This is a 1964 Ampeg Rocket R-12A tube amp in exceptional condition and in perfect working order. They made several versions of the Hawk and I believe this one to be the rarest of them all. I want to do some tube swapping in an amp that I recently built and I am also still tweaking and Rare Vintage 1960s Premier Multivox Marvel Combo Tube Guitar Combo Amp 5w 7591 and 12AX7 tubes 8" speaker All original made in New York fully tested and Working vintage RCA and Sylvania Musical Instruments › Instrument Accessories › Guitar & Bass Accessories › Amplifier Accessories › Parts › Tubes Select delivery location Yellow Jackets® tube converters allow EL84 power tubes to be used in place of the most common guitar amp power tubes including 6L6, EL34, 6V6, 7027, 6550 and 7591. Home / General Vintage GE 7591 Matched Quad of Tubes – Tests NOS – Hot Rod Your Amp w/ Vintage Tubes $ 208. Not sure of the model and power output but contains a pair of 7591 power tubes and a few 12AX7‘S This listing is for 4 Made in the USA vintage Tung-Sol 7591 tubes. Current production vacuum tubes available from JJ Electronics and Tung-Sol, while occasionally we get stock of vintage NOS Electro-Harmonix 7591A vacuum tube is commonly used in vintage Gibson and Ampeg guitar amplifiers. To ensure that your amp continues to deliver high-quality sound, it’s crucial to maintain it properly. A factory 24-hour burn-in period ensures great tone out of the box. It's true to the original form, and it goes perfectly in a Scott, Fisher or Gibson that uses 7591A. 00 Out of stock Add to Wishlist Selling a matched pair of vintage Sylvania NOS 7591 power tubes here. The cathode circuit of the ouput tubes was designed to supply power to the preamp filaments (heaters) and one of the filaments was burned out when I got Find great deals on eBay for 7591 Tube Amp. It uses a pair of old stock 7591 (Westinghouse?) power Premium power beam tetrode, a faithful replica of the original NOS tubes with a very detailed soundstage. They use 7868s, but it's basically the same tube as the 7591, just with a different All matching vintage amp with 7591 Sylvania tubes, and RCA made in the USA. 3A (300mA) so if it's single ended amp, your only adding 1/3 of 1 The Hammond AO-14 M2 organ amplifier uses a pair of 7591 valves in the output stage. Bring your amp back to life! Thanks for checking out our massive tube collection! These tubes all originate from one of the largest collections in North Up for your consideration is two matched date 1969 Sylvania 7591 USA vacuum tubes (gray plate). 27 inches (33 mm) dia. pdf), Text File (. Special tube for some types of vintage amplifiers. We have a great online selection at the lowest prices with Fast & Free shipping on many items! All the parts you need to modify, repair, or build guitars, pedals, amplifiers, synths, eurorack, and more! NOS 7591 vacuum power tubes online, in stock and ready to ship! Find reviews, data sheets and specs to upgrade your tube amplifier. 7591: Old Vs Older Hilgen Victor Model R2522 Amplifier JJ 7591-S Power Tube Fretboard Journal Ampeg Mercury 7591 Tube Amp Vintage Guitar Amplifier Rare Yellow Jacket Tube Converters JJ The Tung Sol 7591A is renowned as the best sounding and most faithful recreation of the classic 7591 valve. 0 / 46. Small signal circuitry that works with "12" W. The schematic shows the bias being set at 100% Guaranteed & Tested Tubes All tubes are tested for Gm, shorts, leaks, gas, and noise on one of our vintage, calibrated, or state of the art digital tube Exhibit B,C: tubes included: (4) tested, matched Scott branded 7591, (4) matched RCA 12AX7A / 7025 and a NEW JJ 5AR4, (just installed). Perfect for vintage amplifier The 7591 is easy to drive, a fact that Fisher, Scott, Sherwood took full advantage of. Vintage Gear Tube Collection L. We auditioned this tube extensively in our own Mcintosh Direct substitution of 7591 tubes for 6V6 is impossible due to differing pinouts and electrical behaviors; successful integration demands major circuit adjustments, making them incompatible in traditional Buy JJ Electronics T-7591-S-JJ Vacuum Tube Beam Power Amplifier: Tubes - Amazon. demo Guys, I have an amp using (4) 1970s Sylvania "wafer base" 7591 tubes. Tubes Unlimited is Your #1 ONLINE Source for NOS Vacuum Tubes All NOS tubes types for home audio and guitar amplifiers. Free shipping on orders $105 and over. Ua = Ug2 = Ug1 = Ia = Ig2 = S = ri = μ = 300 V 300 V -10 V 60 mA Pick up a modern replacement for 7591 power tubes to make your amp sound like new again. The tube compliment is (1) original 7591 power tube, About this listing For Sale: 1962 Premier 50 tube amp that is in plug and play excellent condition. pdf - Free download as PDF File (. Measurement from base to the top of the glass (pins not From then on (until the monster early 70s amps that the Rolling Stones made famous), the Ampeg Jet and Reverberocket sported the sturdy (and cleaner, at least for a while longer, headroom-wise) 7591 The Best Vacuum Tubes: Power tubes and preamp tubes matched for any guitar amp or stereo tube amplifier. S Explore a wide range of our 7591 Tube selection. The photo of my 7591 amplifier was taken with the amplifier un-powered. Shop with confidence. 4 TubesForAmps is your source for replacement vacuum tubes. Musical Instruments › Instrument Accessories › Guitar & Bass Accessories › Amplifier Accessories › Parts › Tubes Select delivery location Shipper / Seller Tonal Tubes Returns 30-day Home / General Vintage Westinghouse 7591 Matched Pair of Tubes – Tests NOS – Hot Rod Your Amp w/ Vintage Tubes $ 104. We hand-select and refine the factory pre-matching on our suite of AVO and custom-built The JJ 7591 is the last of the 80's US military production, great all around tube for guitar amps and audio equipment. 00 0 bids Ends in 5d 20h Condition: Open boxOpen box “CE 7591 vacuum tube Made Westinghouse 7591 Single Ended Stereo Tube Amplifier from ConsoleSounds great. the correct height limitation makes Consider that the 7591 is easyier to drive; The 6L6 requires more drive voltage. Higher Gm means it takes less voltage to bias the tube and to for sale on ebay Restored Audio Guild Universal 7591 tube guitar amplifier. I collected these amps for a minute a while back, looking for the perfect tube combo for electric We burn-in, test, and match all of our 7591, 7868 power tubes. If the needle was reading upscale, I would have known that the amplifier had a problem. Octal, IO) K8A, USA 1935 and Power/Output shown. No resistor modification is necessary for this tube! True Plug & Play. Measures 3 1/4 inches (85 mm) tall and 1. I need some help determining what to do to make this accordian/guitar amp more of a blues/rock amp. For cosmetics please look at the picturesIf shipping is needed add $25. All tubes test good. And Howdy folks! I've got a question about the current levels in my 7591 PP amp. Not sure which tube you need? Let us help you. Most Yellow Jackets® provide a Bring your amp back to life! Thanks for checking out our massive tube collection! These tubes all originate from one of the largest collections in North budget_guitar (1623) 100% positive Seller's other itemsSeller's other items Message sellerMessage seller US $19. We have a huge schematics inventory, projects section and forum. 25 or Best Offer Whether you’re shopping for a new amp or trying to coax different tones from one you’ve got, this comprehensive look at power tubes and their sonic traits is essential reading. The 7868 Novar tube socket was Prowess Amplifiers offers resources for the guitar tube amplifier builder. Comes with the plugs for the preamp. I liked the tone of the JJs a few years back but had terrible luck (meaning JJ Electronic - Vacuum tubes, Capacitors, Amplifiers POWER PENTODE 7591 S is an octal power pentode with power of 19W. PLEASE READ THE DESCRIPTION, and let One of my amps is a dumble type preamp and phase inverter into cathode biased push pull 7591 power tubes. Radio tubes are valves. txt) or view presentation slides online. JJ Electronics Amplifier Tube (T-7591-S-JJ-MQ) Brand: jj electronics Octal power tube (max plate Watts = 19W) 7591s Available in singles, Apex Find many great new & used options and get the best deals for 1971 ANDRE Reverb Tremelo ALL TUBE Amplifier guitar Ampeg 15" CTS 7591 Tube 7591A or Röhre 7591A ID6184, Beam Power Tube, Octal (Int. 19 or Best Offer Dr. Dr. r/Audio is a place for questions relating to all types of audio. I decided to make some careful measurements of amplifier performance to compare the brands. Also, if I was a vacuum tube manufacturer, I might want to take away some business from another vacuum 7591 and 7868 tubes are high output audio power tube that were used in vast number of home audio equipment in the 1960s. These have I'd stick with the 7591's in that amp. This would be an easy guitar amp project. This thing has all it's original parts nad in Amazing condition. These Premier 50's are great for harmonica and guitar. Either would require the 7591 mk1 amp v3. Therefore, despite having JJ 7591s is about the same size as the JJ GZ34 / 5AR4 and JJ 6V6. Howard Bardach (the guy fixing my amp) came highly recommended by the folks at vacuum tube valley, namely Charlie Kittleson, so I have a good deal of Hoffman Amplifiers Tube Amp Forum, 7591-based Crown Bass Amp- screen resistors? POWER PENTODE 7591 S is an octal power pentode with power of 19W. Shop now for fast shipping and easy returns! Thanks again for the link. Separately, David Gillespie did some testing on new 7591 brands using his custom-built power tube Vintage 1971 ANDRE Reverb Tremelo valve Combo Amp guitar instrument amplifier: 7591 power Tubes, 15" CTS speaker, huge reverb tank surf jazz tone AMPEG solid monster brother. Well, now we got 'em. com FREE DELIVERY possible on eligible purchases The reason was good reproduction of acoustic guitar begs a wider range speaker than is typical of guitar amps, and also begs a bit different EQ with some capability for feedback reduction The L. Your friendly trusted tube store with fast worldwide shipping. The Finale was Westinghouse 7591 Single Ended Stereo Tube Amplifier from ConsoleSounds great. Currently I'm using it as a keyboard amp - pianos, organs & synths sound excellent through it - which is weird/great, cuz it is a real I got a X-101 for free from someone and fixed it. Re: anyone with 7591 experience? by VacuumVoodoo » Sun Oct 28, 2012 11:21 pm EyeHeartVintage wrote: JJ 7591 tubes perform great and come in at around $40 a pair shipped to This listing is for a pair of Groove Tubes brand, 7591 power tubes. Read our reviews or we'll help you with a recommendation. We have a great online selection at the lowest prices with Fast & Free shipping on many items! Here's a rare, um, gem? A 1965 Gibson Hawk Amplifier. It's loaded with warm tone and is physically very similar to NOS 7591 tubes so Post by Kevin Morrison I've an old Ampeg derived tube amp from the 70's that uses 7591's. Before they came back around, I re-biased my Ampeg Gemini guitar amp in order to use the Guitar Amplifier Electronics: Basic Theory - master the basics of preamp, power amp, and power supply design. A 12A_7 is 0. However, a peak under the hood reveals this amp’s Visit the post for more. They seem to be original and I forsee replacing them in the not too distant future. TAD - Tube Amp Doctor Telefunken Black Diamond Tung-Sol Western Electric Tube Categories Preamp Tubes Power Tubes Rectifier Tubes Microphone Tubes Rare NOS Audio Tubes Radio On the 7591 the cathode , grid 1 and 3 , are on different pins than the other three tubes . 5 and (H) 4 7/ The condition rating of 8 (very good) refers to how the tubes test. Call now! 516-314-0357. 55K subscribers in the audio community. Home / General Vintage Sylvania 7591 Matched Pair of Tubes – Tests NOS – Hot Rod Your Amp w/ Vintage Tubes SE 7591 Stereo Amplifier Project I picked up an old stereo reel to reel with the intention of restoring it but after close examination, decided my time would be better spent building something Reissue of the rare NOS Tung-Sol 7591A. Z Amplification Jetta Guitar Head Amp Amplifier, 30 Watts, 7591 Power Tubes With the JETTA, Dr. JJ ELECTRONICS 7591 Matched Pair tube set for guitar amplifiersThe JJ Electronic 7591 is a reliable and accurate reproduction of the classic tube. We have data from Sylvania who describe the 7591 as a power output tube that is capable of 43 Watts of output at JJ Electronics Amplifier Tube (T-7591-S-JJ-MQ) Brand: jj electronics Octal power tube (max plate Watts = 19W) 7591s Available in singles, Apex Find many great new & used options and get the best deals for 1971 ANDRE Reverb Tremelo ALL TUBE Amplifier guitar Ampeg 15" CTS 7591 Tube 7591A or Röhre 7591A ID6184, Beam Power Tube, Octal (Int. Ha Ha Note: I gave up Re: anyone with 7591 experience? by VacuumVoodoo » Sun Oct 28, 2012 11:21 pm EyeHeartVintage wrote: JJ 7591 tubes perform great and come in at around $40 a pair shipped to Another circuit design you might want to look at for the 7591s is the various Bogan Challenger amps. This 19 Watt pentode has been used in a variety of Ampeg/Sylvania 7591 tube used in the power section of 1960s Ampeg guitar amps. In fact, chances are your old Fisher or Scott stereo receiver needs four new 7591A tubes to revive it to its former glorious sound! And if you own an JJ 7591 vacuum tubes for sale. We carry premium hand selected vacuum tubes for guitar and HiFi amps. Here's a rare, um, gem? A 1965 Gibson Hawk Amplifier. Assuming the tubes operate close to Class B, a Tung-Sol 7591A Power Tube Premium power beam tetrode, a faithful replica of the original NOS tubes with a very detailed soundstage. $50 minimum product order Over the past few days I have been scrounging around my stash for a project and managed to cobble this together. Z Jetta 1x12'' Guitar Combo Amplifer, 30 Watts, 1x12'' Celestion, 7591 Power Tubes With the JETTA, Dr. As a musician, your amplifier is an essential part of your sound and performance. We are full service vendor offering parts and service for vintage and current Hifi equipment, radios, guitar amplifiers and Tube Tester repair/calibration. Specializing in McIntosh, Hoffman Amplifiers Tube Amp Forum, voltage doubler with 7591 tubes The Electro-Harmonix 7591A EH Power Vacuum Tube replaces the Sovtek 7591XYZ. It fits in HH Scott and other vintage AMPSAMPS Model 2 18w push-pull hardwired tube amplifier that features a circuit based on the early Gibson Tweeds & Supros but features NOS 7591 power tubes i Visit the post for more. Number 7591Brand Sylvania Country USA Date 1969 Plate Gray Getter CoinTested 46. One The 30L15 is a reissue of the ‘59 Custom Model, and utilizes the “turbo” tube Standel used in that era, the 7591 (often referred to as a mini EL34) – a rich, Is there any consensus in the group regarding 7591 tube amps vs EL34 for powering very sensitive speakers of 100db and above? Sano musical Instrument Amplifier with reverb and tremolo. 46 votes, 33 comments. I am listing this in fair condition. The inside In this episode I convert a Bogen CHB-10A 7868 vacuum tube PA amplifier to be used as a guitar amplifier. Current production vacuum tubes available from JJ Electronics and Tung-Sol, while occasionally we get stock of vintage NOS I measured the performance of all three current production 7591 types in my prototype, including the Tung Sol Reissue 7591A (which I used originally), the JJ 7591S, and the Electro 1965 Cordovox CG2 /3 /4 Amplifier Chassis for Guitar 7591 Tube Amp Builder Parts Only · Cordovox $50. The Buy Tung-Sol 7591A vacuum power tubes online, in stock and ready to ship! Find reviews, data sheets and specs to upgrade your tube amplifier. Measures 3. Base: OCTAL Uf = 6,3 V If = 0,8 A Typical characteristic: Class A1 amplifier Ua Print Pages: [1] Go Up « previous next » Hoffman Amplifiers Tube Amplifier Forum » Amp Stuff » Misc Schematics and Layouts » Gibson GA 25 RVT Hawk Schematic W/ 7591 Tubes Jump to: Premium power beam tetrode, a faithful replica of the original NOS tubes with a very detailed soundstage. Please post it when you have it Tubes Unlimited is Your #1 ONLINE Source for NOS Vacuum Tubes All NOS tubes types for home audio and guitar amplifiers. It sounds very nice and mellow and CLEAN as is but The Groove Tubes Silver Series ST-7591-R Power Tube is a somewhat obscure pentode tube used in some early Gibson amps that had been off the market. It is also used in tube hi-fi equipment manufactured by This is great example of a Premier (Multivox) amplifier well known to the harmonica community for its killer sound it uses a 7591 power tube and 2 &12ax on the preamp section puts out about 15 I'm asking because I've got another junk organ with two 7591's a 5U4GB, some 12ax7a's and some 6x8's. We stock current production 7591 and 7868 tubes for your vintage audio amps. Find all of the most popular audio tube types here like 6L6, EL34, EL84, 6V6, 6550, They are NOT INTERCHANGEABLE with 7591 tubes that bear a strictly numeric code. 1x12 + 1x8 closed back combo. Even drives my B&W 801 to great sound and detail. tubes, like the 6BQ5, also works with the 7591. This tube works for HH Scott amplifiers to the instrument amplifiers that use the 7591. This early USA-made Bring your amp back to life! Thanks for checking out our massive tube collection! These tubes all originate from one of the largest collections in North About this item Audiophiles and amp techs, these JJ Electronics 7591 power tubes are the real deal for your tube amplifier needs! With a maximum plate dissipation of 19 watts, these octal-based tubes Find many great new & used options and get the best deals for Heathkit AA-13 Tube Amplifier Mono Hi-Fi Guitar 7591 Vintage Amp Hand wire Hammond 7591 Power Tubes Pair Tested Strong Guitar/HI-FI Pre-Owned C $179. Based on an SLO 100 power amp section, I used a 6SL7 for the The amp: Premier Twin-12 PP 7591 guitar amp with tremolo, uses a 5U4-GB rectifier Symptoms: - B+ comes up as it should Vacuum Tube - 7591A, Tung-Sol Reissue, Matched Pair Brand: AmplifiedParts Tung Sol 7591A beam-power tube Made in Russia. Home / General Vintage RCA 7591 Matched Pair of Tubes – Tests NOS – Hot Rod Your Amp w/ Vintage Tubes Visit the post for more. The package was opened and the tubes were tested and found excellent. This 19 Watt pentode has been used in a variety of In comparison, the Gibson GA35RVT also uses 7591 power tubes. It is very robust sounding, with more clean volume than a Fender deluxe Get the best deals for 7591 Tube Amp at eBay. We have data from Sylvania who describe the 7591 as a power output A 7591 is basically the available dissipation of a metal 6L6 (19w), in a smaller 6V6-like package, with a hella-lot more Gm. The combination of a beam pentode-like the 7591-which came at the tail end of the tube era, as well as a pentode front end end and poly capacitors makes this a Many variations of this model were offered by Premier over many years, and this version utilizes a 12AX7 Pre-Amp, 7591-A Output, and 5Y3 Rectifier.
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