Angela Instruments

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Tubes For Guitar Amplifiers And Hi-Fi

Q . "Hey Steve, what the heck are N.O.S. tubes and why should I buy 'em instead of those cheaper Chinese and East European tubes I just saw 'reviewed' (and advertised...) in BUY TOO MANY GUITAR AMPS NOW! and HI-FI LUNATIC magazines? I know these Chinese and East Euro tubes must be really awesome because they have 'groovy' logos painted on 'em and they're the only ones in stock at the big chain music stores I shop at."
A . 'N.O.S.' stands for NEW OLD STOCK, meaning that the tubes were made long ago but never put into service. 'N.O.S.' American and Western European built tubes from the '40-'90s offer higher reliability and superior sound QUALITY. For those reasons N.O.S. tubes are preferred by professional musicians, hip recording studio engineers and High End audio "nuts". These sophisticated and critical tone connoisseurs generally agree that tubes from the 'golden era' are much better in every way than the cheap Russian junk widely available today. While the quality of some imported current production tubes has improved recently, 'N.O.S.' remains the standard for high quality sound. Since 1977 we've sold over a million N.O.S. tubes, many to the greatest guitarists the world has ever known. You've heard our tubes on hundreds of recordings, as well as on countless concert stages all over the world. Try 'em for yourself. Get the best sound possible out of your gear with the right tubes.
mullard tube

Rectifier Tubes
1. GZ34/5AR4, International Brand, '70s N.O.S., made by Matsushita in Japan, found as original equipment in some Dynaco and other vintage hi-fi, typical short glass envelope with crossed seams on top, 'rainbow' getter, black base. These are not quite as rugged as Mullards but you can expect 10+ year service in most circuits and they're probably the 'next best' affordable choice if you need a real N.O.S. GZ34. Back in the day, many now esteemed hi-fi companies used these as original equipment; they're that good. SOLD OUT.
2. 5R4WGB JAN CETRON '80s NEW OLD STOCK, heavy glass with flat top, heavy grey high voltage 'potato masher' base, black plates. Super heavy duty rectifier tube for your amp projects, power supplies, etc. An affordable alternative to increasingly costly 5U4GBs and other 5V rectifiers; fits the same octal socket and has the same pignut as 5U4GB. Like some other Cetron rectifiers (and many Tung-Sols for that matter...) the flash gettering on these tubes won't win any beauty contests but it works just fine. Made in USA. Original individual boxes. EACH $8.99.
3. 5U4GB Join Army Navy NEW OLD STOCK RCA '60s-'70s N.O.S., original equipment in many vintage guitar amps including Fender, etc. A fine choice for guitar and hi-fi amps. Good stock on hand so we can supply groups of tubes from the same period of manufacture upon request. EACH $29.
4. 5U4GB General Electric, '60s-'70s N.O.S., original boxes, real nice tubes for guitar amps and hi-fi. EACH $22.
5. 5Y3WGTA JAN PHILIPS/SYLVANIA RECTIFIER TUBES FOR FENDERS AND OTHER VINTAGE AMPS! '80s NEW OLD STOCK, black phenolic base, black box plates, beautiful top flash gettering, one of the very best 5Y3GTs you can buy. Fine choice for older Champ, Princeton and other great guitar amps! Made in USA! This rugged military tube is the 5Y3GT type we recommend for most applications including Fender guitar amps and even TV-7 tube testers. Tested and guaranteed for ONE YEAR! A BEST BUY! EACH $14.99. SPECIAL! WE'VE GOT AROUND FIFTY OF THESE TUBES WITH SLIGHTLY DISCOLORED TOP FLASH GETTERING. THESE DON'T LOOK AS NICE AS OUR 'FIRSTS' BUT THEY WORK EVERY BIT AS GOOD. ALL HAVE BEEN TESTED AND ARE GUARANTEED FOR ONE YEAR! STEAL 'EM FOR JUST $10 EACH!
6. 6CA4/EZ81 Tesla '80s NEW OLD STOCK, made in Slovakia, original boxes. Good replacement tube for older guitar and hi-fi amps. Four to sell. EACH $24.
7. 6V4/EZ80 '60s N.O.S., stamped "GROMMES MADE IN GERMANY BY SIEMENS", premium quality, excellent choice for older guitar amps and vintage hi-fi, bulk packed manufacturing stock so no individual boxes. EACH $18.
8. 6X4, NEW OLD STOCK, various good brands including GE, RCA, made in USA, tested and guaranteed. EACH $8.
9. 6X5GT RCA '50s N.O.S., only two pieces to sell. EACH $19.
10. 6X5GT Philco '50s-'60s N.O.S., made by Sylvania. EACH $7.
11. 12X4 "Dumont" '60s N.O.S., manufactured by RCA, individually boxed. EACH $7.
12. 12X4 RCA '60s N.O.S. EACH $7.
13. 35W4 RCA '50s-'60s N.O.S. EACH $9.
14. 35W4 Sylvania '50s-'60s N.O.S. EACH $9.
15. 35W4 Philco '50s-'60s N.O.S., manufactured by Sylvania. EACH $8.
16. 35W4 Westinghouse '50s'-60s N.O.S., probably manufactured by RCA. EACH $8.
17. 35W4 Raytheon '60s N.O.S. EACH $8.
18. 35Z5GT Philco '50s-'60s N.O.S., manufactured by Sylvania. EACH $8.
19. 35Z5GT Tung-Sol '50s N.O.S. EACH $10.
20. 35Z5GT Sylvania '50s-'60s N.O.S. EACH $8.
21. 35Z5GT GE '50s N.O.S. Only one to sell. EACH $8.
22. 35Z5GT Raytheon '60s N.O.S. Only one to sell. EACH $8.
23. 35Z5GT Westinghouse '60s N.O.S. Only one to sell. EACH $8.
24. 83 RCA N.O.S. '60s-70s NEW OLD STOCK, "Coke bottle"/ST shaped mercury vapor rectifier. Great for fixing up that old military tube tester or as an alternative to 5Z3, 5U4G and other rectifiers for that tube amp power supply project? Surplus from TV-2 military tube tester spare parts kits so no original boxes. These are getting to be pretty hard to find. Each tube is given an operational test. Only a few to sell. EACH $35.
25. GZ37/CV378 MULLARD UK RECTIFIER TUBES! Lovely, tall (4.75" ) brown based British military N.O.S. stock circa '67. "Coke bottle"/ST shape looks great in vintage gear. Works fine in most circuits in place of a GZ34 but be aware that you'll get a 10-20 volt DROP in B+. I checked this out in an old Vox AC-30 etc. and the average drop, compared to a real Mullard GZ34 was 12 volts. This may be just what you're after for some amps. We've sold a number of these to vintage hi-fi amp owners who wanted to run modern EL34 (Tesla, Siemens, etc.) and needed to drop the B+ a bit. I've also tried the GZ37 in place of 5U4, 5V4, 5R4 and other full wave rectifiers with good results. The $80,000 Audio Note Ongaku was shipped stock with four GZ37 tubes. Caveats; the GZ37 filament draws about 3A, while the GZ34 draws about 2A; make sure your power transformer is in good shape. In my experience using hundreds of these tubes over the past twelve years, the published ratings for the GZ37 seem to be very conservative. The bottom line? You can probably expect many years of reliable service from these fine rectifier tubes. You can also expect years more out of your expensive power tubes than if you were using directly heated or solid state rectification, since the indirectly heated GZ37 has the same controlled warm-up, slow B+ rise characteristics as the legendary GZ34. Check out a picture of this great tube on the TUBE GALLERY pages of this site. LAST CALL? EACH $119.

Power/Output Tubes For Guitar And Hi-Fi Amps

6AQ5/6005 Tubes For Fender Etc.
1. 6005W JAN General Electric '80s NEW OLD STOCK, round grey coated plate, very nice build quality. "6005W" is the military designation for a rugged premium 6AQ5A tube. Original individual military boxes. Fine choice for that old Fender guitar amp or for building new low power amps! SUPER SALE! EACH $12, BUY TEN OR MORE FOR JUST $10 EACH!!!
1. 6AQ5A RCA '69 N.O.S., great for old Fender amps, twenty two like this to sell. EACH $17.
2. 6AQ5A RCA '70s N.O.S., only four to sell. EACH $15.
3. 6AQ5A/6GH5 GE '70s N.O.S., only three to sell. EACH $12.
4. 6005W JAN Sylvania '80s NEW OLD STOCK. Only two to sell. EACH $12.
5. 6AQ5W JAN Sylvania NEW OLD STOCK. Cool for old Fender amps. Only two to sell. EACH $12.

6BM8/ECL82 For Old Marshall Etc.
1. 6BM8/ECL82 Amperex Bugle Boy '60s N.O.S., stamped "MADE IN HOLLAND". beautiful tube! One to sell. $33.

6GV8/ECL85 For Old British Amps Etc.
1. 6GV8/ECL85 RCA '60s NEW OLD STOCK, stamped "MADE IN HOLLAND". Probably manufactured by Amperex. Three to sell. EACH $29.
2. 6GV8/ECL85 RCA '60s NEW OLD STOCK, stamped "GT BRITAIN". Probably manufactured by Mullard. One to sell. $29.

6K6GT Tubes For Old Fender Reverb Units, Etc.
1. 6K6GT/VT-152 Ken-Rad '41 N.O.S., black coated glass. Only one tube to sell. $10.

6L6 Family Tubes
1. 6L6WGB TUBES FOR FENDER AND OTHER GREAT GUITAR AMPS! '80s vintage USA made JAN Philips/Sylvania military grade N.O.S. tubes! Black phenolic base is stamped "6L6WGB". Fine choice for restoration and repair of tube guitar and hi-fi amps by Fender, Ampeg, Peavey, Altec, Marshall, Heathkit and many other good brands. Similar in operating conditions and sonics to the legendary Tung-Sol 5881 found in old Fender pre-CBS amps. If you're looking for good breakup and blues tone at low volume, these are the ticket. You should also consider these Philips tubes as a fine upgrade to the cheap, imported 6L6 tubes shipped as original equipment in many otherwise fine new amplifiers. We carefully age and burn-in these tube under 'real world' operating conditions, at full voltage. Each one is then audibly tested in a cranked Marshall 100 watt chassis. Finally, we match the tubes to exactly the same plate current/mA at full operating voltage (400VDC) into pairs and quads. MANY THOUSANDS SOLD WORLDWIDE BY US OVER THE PAST TEN YEARS. MATCHED PAIRS $60, MATCHED QUADS $120.
Steve's Mailbag...6L6WGB Ratings?
Q. "I'm interested in some of the Philips/Sylvania 5881/6L6WGBs you have on the website but I have a couple of questions. I have two different guitar amps I'd be using them with, one with a plate voltage of 485, the other with a plate voltage of 450. Do these tubes do OK on voltages this high? Also what's the maximum wattage on these tubes (static dissipation)?"
A. The higher voltage you list below is well in excess of that recommended for Class AB audio amplifiers by any USA manufacturer of N.O.S. 6L6s I'm familiar with. Even 450 plate volts is at the outer limit for 'design maximum operation' of N.O.S. USA 6L6s, meaning that frequent tube replacement will almost certainly be required. For 5881 type tubes, the 'design center' maximum recommended plate voltage is 400, plate dissipation around 23 watts (a few more watts perhaps depending on class of operation). See the RCA TUBE MANUAL, RCA HB SERIES ENGINEERING HANDBOOK, SYLVANIA TUBE MANUAL, TUNG-SOL TUBE MANUAL, etc. We burn-in our 6L6WGBs 400 plate volts, audibly test them at 450 plate volts in a Marshall 100 Super Lead chassis, and typically match them to within 1mA at 400 plate volts. I'd consult with the manufacturer of your amps and try to purchase power tubes directly from them, since they're responsible for providing tubes that'll stand up to those rather high plate voltages and ought to offer some kind of replacement guarantee. Best of luck with your project.
Steve's Mailbag...6L6s For Hi-Fi?
Q. Hey Steve, I have a Golden Tube SE40 power amp that uses six 6L6/5881s. What do you think of the '80s vintage USA made Philips/Sylvania military grade N.O.S. tubes as a choice for this amp? I have a set of Sventlanas currently that sound OK but a little dry. I have also tried Sylvania 6L6GCs which sounded bright and thin. Thanks for your help!
A. My guess is that you really don't like the sound of that amp. If I were you, I'd trade it for something that uses a more linear breed of output tube, something like an EL34, KT88 or (even better) a triode amp with 300Bs. 6L6s were designed in the '30s as high power public address tubes. The fact that they were not especially linear in response, compared to the older triode tube types, was widely noted in the literature of the time. This "kink" in the response curve was also noted by M.O. Valve of England, who developed the justly famous KT66 (KT stands for KINKLESS TETRODE) and other KT series tubes in the '40s to partially overcome this problem. Yes, some of my favorite classic hi-fi amps, such as the Radio Craftsmen C-500, used KT66s. Radio Craftsmen, like some of the other old timers, used the KT66 wired as a triode and this further alleviated the 6L6 family tendency to stridency in the midrange and lower treble. By the way, the midband "kink" in the curve of the 6L6 family tubes was famously exploited by guitar amp designers, most notably Leo Fender. That 'in your face' twangy 6L6 tone with lots of 'bite' defines the classic Fender sound.

7581A/6L6GC 'STR" Etc. For Fender Twin Reverb, McIntosh And More...
1. 7581A '80s vintage JAN N.O.S., USA made by Philips/Sylvania in Emporium, Pennsylvania. Military grade version of the famed 'STR' 6L6GC! with double 'halo' getters, ample top flash gettering. This robustly constructed large bottle tube gives a KILLER, ballsy high power sound in old Fender Twins. Best choice for clean/high headroom sound in most vintage 6L6GC hi-fi amps, too. CAREFULLY* MATCHED PAIRS $200, MATCHED QUADS $400.
*We match one pair or quad at a time to exactly the same plate current/mA and test them tested audibly as well at full operating voltage.

6V6 Family Tubes For Fender, Etc.
1. 6V6GT N.O.S. For Fender, Etc.! Made In USA! THE REAL THING! 6V6 GT N.O.S. military Philips/Sylvania USA '80s stock. Among the best versions of this tube ever made. Black plate version, tested by us at full operating voltage. Want your vintage Fender, etc. to sound GREAT the way it used to? SINGLES FOR YOUR CHAMP $30, MATCHED PAIRS $60, MATCHED QUADS $120.

35C5 Tubes For Old Guitar Amps, Radios, etc.
1. 35C5 Sylvania '50s-'80s N.O.S One to sell. $8.

35L6 For Old Guitar Amps
1. 35L6GT RCA '50s-'60s N.O.S. BLOWOUT! EACH $4.50!!!
2. 35L6GT Sylvania '50s N.O.S. Only a few to sell. BLOWOUT! EACH $4!!!
3. 35L6GT GE '70s N.O.S. Only four to sell. BLOWOUT! EACH $2!!!
4. 35L6GT Hytron '60s N.O.S. Only two to sell. BLOWOUT! EACH $2!!!
5. 35L6GT Rauland '60s N.O.S., probably RCA made. Only one to sell. BLOWOUT! $2!!!
6. 35L6GT "Ten" brand '60s N.O.S., manufactured in Japan. Interesting collectors item. Only one to sell. BLOWOUT! $2!!!
50C5 For Old Guitar Amps
1. 50C5 GE '60s-'70s N.O.S. Only a few to sell. EACH $10.
2. 50C5 Westinghouse '60s N.O.S. Only two to sell. EACH $10.
3. 50C5 Raytheon '60s N.O.S. Only two to sell. EACH $10.

50L6 For Old Guitar Amps
1. 50L6GT GE '50s-'60s N.O.S. Only six to sell. EACH $8.

EL34 Family Tubes
1. EL34 N.O.S. 'SIEMENS' GERMAN TUBES! EL34/6CA7 'Siemens' N.O.S., circa 1987, specially selected and tested for the U.S. Government. These "National Made In Germany" branded military tubes are the same as found as original equipment in '80s Marshalls, Trainwreck, numerous good High End audio amps, etc. These tall, slim profile tubes have a very characteristic dimple on top of the glass envelope, black plastic base. Offering a smooth, refined Mullard-like sound, these nicely made German EL34s should be considered as a sonic upgrade over currently available East European and Chinese EL34s. Reliability is good if the max. 450V plate rating is respected. These tubes work very nicely in triode-connected and ULTRALINEAR hi-fi amps. This is the tube we usually recommend for most Marshalls (not plexis), Trainwreck, most hi-fi amps, etc. We operationally test each and every one of these tubes in an old Marshall 100 watt Super Lead amplifier. We match 'em at full operating voltage. NOTE: These tubes are referred to, somewhat generically by guitar slingers as "Siemens", since that is how zillion of 'em were branded, packaged and sold here during the '70s and '80s. Siemens did not actually manufacture these tubes. I was told by one of the most esteemed guitar amp manufacturers that these tubes were made in East Germany in a factory jointly owned by the then communist government and ITT corporation. This factory closed down abruptly at the end of the '80s when Germany become 'reunified'. We've seen these tubes with following brandings affixed; Telefunken, Siemens, Mullard, Brimar, Marshall, Dynaco, Precision, National, Groove Tubes (stock item in many Trainwrecks, including mine!), RAM LABS, Mazda, Edicron, ITT-Lorenz, RSD and others. No matter how they are branded, these tubes are all exactly the same in my experience so don't get hung up on the logos. SINGLE TUBES $50, MATCHED PAIRS $100, MATCHED QUADS $200.

EL84/6BQ5/7189A Family Tubes For Vox, Etc.
1. EL84/6BQ5 used/tested, various good USA and West European brands (our choice), good for cost conscious repairs and D.I.Y. projects. No matching available at this price but we can supply groups of two electrically compatible tubes. SINGLE TUBES $15, GROUPS OF TWO TUBES $30.

EL82 AUDIO OUTPUT PENTODES AT A VERY NICE PRICE...
1. EL82, '60s NEW OLD STOCK, probably made by Amperex or Philips somewhere in Western Europe, top of glass bulb shows seam lines typical of Amperex and Philips '60s tubes, grey plate structure, looks somewhat like EL84s made by these companies. I wouldn't use EL82s in an amp designed for EL84s but you might want to consider these tubes for your next 'scratch built' guitar amp project. Check the tube manual ratings for 6DY5. Bulk packed manufacturing stock so no individual boxes. LAST CALL? NINE LEFT IN STOCK. SINGLE TUBES EACH $10.
2. EL82 "Zarex"" brand (by "Z&I Aero Services Ltd. London, W.2., England"). '60s NEW OLD STOCK, British jobber brand but probably East German manufacture; tubes are stamped "EL82 MADE IN GERMANY". Probably manufactured by RTF in East Germany; nice heavy glass characteristic of this brand. Grey plate structure looks almost identical to EL84s made by this company. Cool green/black/white individual boxes. Only five pieces left to sell. EACH $8.

6973 Power Tubes For Old Magnatones
1. 6CZ5 RCA '60s N.O.S. OK as a replacement for 6973 in some amps. Check the schematic for your amp against the tube manual ratings and pinout for 6CZ5. Two to sell. EACH $8.

KILLER 7027A Tubes For Your Old Ampeg!
1. 7027A, JAN military N.O.S. '80s Philips/Sylvania USA! Great for old Ampeg guitar amps as well as vintage hi-fi! Try some of these in your McIntosh 240; they KILL the original 6L6GC tubes. As many of you know, high quality versions of these hard to find tubes have been out of production for years. Don't get suckered by those cheap East Euro imitations; some are just re-labled 6L6s. All of our 7027As are operationally tested at full operating voltage in a vintage Stromberg-Carlson PA amp. MATCHED PAIR $80, MATCHED QUAD $160.

Small Signal/Input/Preamp Tubes

6AQ8 For Old Gibson Guitar Amps, Hi-Fi Amps, Etc.
1. 6AQ8/ECC85 RCA '50s N.O.S. One to sell. $12.
2. 6AQ8/ECC85 '70s N.O.S. One to sell. $10.
3. 6AQ8/ECC85 General Electric '80s N.O.S. Two to sell. Tested and guaranteed. EACH $11.

6AU6 For Old Audio Gear
1. 6AU6WB Sylvania N.O.S., 1966, military grade tubes in original yellowed boxes. Only ten to sell. EACH $5.

6AV6 TUBES FOR EARLY FENDER AMPS
1.6AV6 N.O.S. '50s RCA, found as orig. equipment in early Fender amps. EACH $6.
2. 6AV6 Sylvania '80s N.O.S. Two to sell. EACH $6.
3. 6AV6 Raytheon '60s N.O.S. One to sell. $5.

6BL8 TUBES
1. 6BL8/ECF80 Sylvania '70s N.O.S., only one tube to sell. $6.
2. 6BL8/ECF80 GE '70s N.O.S., only one to sell. $6.

6BQ7/6BS8 FOR OLD SCOTT TUNERS, ETC.
1. 6BZ7/6BQ7 RCA '67 N.O.S. One to sell. $5.

6C4 FOR SVT, ECHOPLEX, GIBSON AMPS
1. 6C4 General Electric, '50s-'70s N.O.S. BLOWOUT! EACH $7!!!
2. 6C4 Sylvania '60s N.O.S. BLOWOUT! EACH $7!!!
3. 6C4 Philco (Sylvania) '50s-'60s N.O.S. BLOWOUT! EACH $7!!!

6EU7 FOR ECHOPLEX, GIBSON AMPS, AMPEX GEAR, ETC.
1. 6EU7 JAN General Electric N.O.S. '80s. Good stock on hand of these hard to find tubes. Good choice for old guitar amps and vintage hi-fi. Original individual boxes. EACH $22.

6J5 TUBES FOR EARLY GUITAR AMPS, ALTEC GEAR ETC.
1. 6J5 Sylvania '50s N.O.S., metal tube. Six to sell. $15.
2. 6J5 GE '50s-70s N.O.S., metal tube. Three to sell. $15.
3. 6J5 RCA '50s N.O.S., metal tube. Three to sell. $15.
4. 6J5 RCA '70s N.O.S., metal tube. Three to sell. $15.
5. 6J5 "Dumont" '60s N.O.S. Like most "Dumont" branded tubes, this one was probably manufactured by RCA. One to sell. $12.
6. 6J5GT RCA '70s N.O.S. Very nice looking glass tube. Only one to sell. $22.

6J7 INPUT PENTODE TUBES FOR EARLY GUITAR AND PA AMPS
1. 6J7 RCA '50s N.O.S.. Two to sell. $11.
2. 6J7 RCA '70s N.O.S. Six to sell. $11.
3. 6J7 GE '50s N.O.S. Two to sell. $6.
4. 6J7 GE '70s N.O.S. Two to sell. $6.
5. 6J7 Ken-Rad '50s used/tested. Three to sell. $4.
6. 6J7 Canadian Marconi/Radiotron early '50s, used/tested. One to sell. $4.
7. 6J7 Canadian General Electric, '50s, used/tested. One to sell. $4.
8. 6J7GT General Electric '50s, used/tested, straight sided glass tube. One to sell. $6.

6K11 COMPACTRONS FOR OLD AMPEGS
1. Raytheon 6K11, '70s NEW OLD STOCK, probably made in USA by GE. $19.

6SC7 OCTAL DUAL HIGH MU TRIODE INPUT TUBES FOR EARLY GUITAR AMPS AND OTHER VINTAGE SOUND EQUIPMENT
1. RCA 6SC7, '50s-'60s N.O.S., original happy Springtime red/black/white boxes with famous "meatball" lightnin' bolt logo. This version of the 6SC7 was used alternatively with Tung-Sol as original equipment in some early '50s Fender tweed guitar amps, including the Pro model. $29.
2. 6SC7 JAN RCA '50s N.O.S., military graded version of above. EACH $35.
3. 6SC7 Radiotron '40s N.O.S., metal tubes with old style logo, military boxed. Only two two sell. $22.
4. 6SC7, General Electric '50s-'70s, good for repairs to old guitar amps, nice price. $17.

6SJ7 INPUT PENTODE TUBES FOR EARLY SOUND EQUIPMENT
1. 6SJ7WGTA JAN Philips/Sylvania '80s N.O.S. One of the best glass enveloped versions of this tube ever made. Rich, full bodied sound, very reliable, quiet too. Replaces troublesome and scarce Western Electric 310A tube in D.I.Y. Model 91 clone amp designs. Also found in some early guitar and PA amps (see the old Ryder PA Manual for numerous examples). This tube also will serve as a good alternative choice to the now hard to find EF86, if you can change over to an octal socket; check your tube manuals and you'll find that the EF86 and 6SJ7WGTA have similar operating characteristics, although I think the 6SJ7 sounds richer. EACH $12.99.

6SL7GT DUAL TRIODE OCTAL INPUT TUBES FOR EARLY FENDERS, AMPEG PORTAFLEX AND OTHER VINTAGE SOUND EQUIPMENT
1. 5691/6SL7GT N.O.S. '80s JAN Philips tubes. Made in Emporium, Pennsylvania USA. These lovely black based tubes are the Philips version of the famed RCA Special Red Series type, featuring the same stainless steel support rods (FIVE in number...), large plate structures and other detail refinements. Many audio enthusiasts believe that these Philips 5691 tubes are among the very finest 6SL7GT types ever produced. Use 'em in high gain preamplifiers as well as in amplifier input stages. Not recommended for Ampeg Portaflex; use other 6SL7GT types, especially RCA described below. We do recommend that you consider building a guitar amp using these tubes on the input side instead of those ubiquitous 12AX7s if you're looking for a smoother, richer sound. EACH $39.
2. 6SL7WGT JAN Sylvania '50s. Brown Micanol base, short rounded black plates, top flash getring. Superb quality and sound! We have one example dated '55, the other '56. These two tubes are almost identical in construction; one has a brown Micanol base a bit darker than the other. $25.
3. 6SL7GT Tung-Sol '50s NEW OLD STOCK, tall glass, ribbed plates, original box. Very nice tube for that old Ampeg guitar amp for for premium quality hi-fi. Only one like this to sell. $32.
4. 6SL7WGT Tung-Sol '63 NEW OLD STOCK, brown base, very fine quality for guitar amps or hi-fi. One to sell. $24.
5. 6SL7GT GE '60s N.O.S., shiny nickel plates, very nice tube for hi-fi or guitar amps. Only one like this left to sell. $15.
6. 6SL7GT Tung-Sol '60s NEW OLD STOCK. Black coated glass, black phenolic base. Original box. Only one to sell. $33.
7. 6SL7GT used/tested, various good brands (our choice), good for those 'low bucks' repair jobs. EACH $10.

6SN7GT DUAL TRIODE OCTAL INPUT TUBES FOR AMPEG, FENDER AND OTHER GUITAR AMPS AND VINTAGE SOUND EQUIPMENT
1. 6SN7WGTA JAN Sylvania NEW OLD STOCK, '70-'80s vintage, black base with green print, triangularly oriented black box plates. Made In USA. Excellent choice for guitar amps or hi-fi; fine balanced sound, low noise. Bulk packed tubes so no individual boxes. These tubes have been sitting on a funky warehouse shelf for over twenty years so they need a bit of light cleaning. Each tube tested and guaranteed. High quality 6SN7s are now getting very hard to find at an affordable price. Twenty six to sell. BARGAIN! EACH $29!!!
2. 6SN7GT/GTB RCA '50s-'70s N.O.S., full sized ribbed rectangular plate structure, full size black phenolic base. Used as original equipment in many older Ampegs. These tubes are probably one of the most 'authentic' choices for vintage guitar amps but they're also excellent for high quality hi-fi. EACH$ 35.

6U8/A, ECF82, ETC. FOR H.H. SCOTT AND OTHER VINTAGE SOUND GEAR
1. 6U8A RCA '60s N.O.S. Only one to sell. $10.
2. 6U8A Westinghouse '50s N.O.S. One to sell. $10.
3. 6U8A GE '70s N.O.S. One to sell. $10.

12AU7 TUBES FOR GUITAR AMPS AND OTHER VINTAGE SOUND GEAR
1. 12AU7/ECC82 Amperex '50s-'60s Bugle Boy, stamped "MADE IN HOLLAND", excellent sound and reliability for critical applications. Original boxes. Very limited stock on hand. EACH $59.
2. 12AU7A/ECC82 Amperex '50s-'70s Bugle Boy, stamped "MADE IN ENGLAND" or "MADE IN GT. BRITAIN"; look identical to "MADE IN HOLLAND" version. Original boxes. Good stock on hand. EACH $39.
3. 12AU7A/ECC82 Amperex '60s-'70s, stamped "MADE IN HOLLAND", identical to Bugle Boy versions but no Bugle Boy logo. Original boxes. Good stock on hand today. EACH $39.
4. 12AU7/ECC82 Amperex '60s-'70s, orange print, no Bugle Boy logo. Some are stamped "MADE IN HOLLAND", some "MADE IN ENGLAND" or "MADE IN GT. BRITAIN". Premium quality tubes at a bargain price. Original boxes. EACH $25.
5. 12AU7WA/6189 RTC brand '60s N.O.S., very nicely made in FRANCE, two getter ring support tabs, green RTC logo, excellent choice for guitar amps and high performance hi-fi, typical European sound, good affordable alternative to Mullard and Amperex with similar visual and sonic characteristics. Original boxes. BEST BUY! EACH $17.
6. Pinnacle UK 12AU7 '60s N.O.S., Western European manufacture (exact maker uncertain...), small grey plates with single side support. Good affordable 12AU7 for general repairs. Original spooky looking boxes. Sixty pieces to sell. EACH $17.
7. 5963 RCA '50s N.O.S., premium industrial 12AU7 type, top getter with full sized ribbed grey plates. Original boxes. Forty pieces to sell. EACH $19.

6189w

8. 6189W JAN Philips/Sylvania '80s vintage NEW OLD STOCK, original military boxes, good rugged 12AU7 for guitar amps and hi-fi. Excellent stock on hand today. EACH $15.

12AT7/ECC81 TUBES FOR GUITAR AMPS AND VINTAGE SOUND GEAR
1. 12AT7/ECC81 Telefunken '60s N.O.S., diamond bottom tubes. Premium tubes for recording gear and high end audio equipment. Original boxes. Tested and guaranteed. Only four pieces to sell. EACH $99.
2. 12AT7/ECC81 Amperex Bugle Boy '60s N.O.S., stamped "MADE IN GERMANY". Premium Western European tubes for recording gear and high end audio. Only two left to sell. EACH $79.
3. CV455/12AT7 '60s N.O.S., Mullard manufactured tubes in Valve Electronics oversize British military packaging, black plastic pin 'keeper' on each tube, small grey plates with single side supports. Good tube for guitar amps, recording gear and hi-fi. Only a few left to sell. EACH $35.
4. 6201 Valvo '60s NEW OLD STOCK, gold plated pins. Premimum Western European manufactured tube. One to sell. $32.

5. 12AT7WC General Electric JAN '70s-'80S N.O.S. Fine choice for FENDER and other classic guitar amps. EACH $19.
6. 12AT7WB General Electric JAN '60s-'80s N.O.S. Fire 'em up in your Fender. Only a couple to sell. EACH $19.

12AX7/ECC83 TUBES FOR GUITAR AMPS AND VINTAGE SOUND GEAR
1. 12AX7WA Philips ECG JAN '80s NEW OLD STOCK, manufactured in Emporium, Pennsylvania by Sylvania. Grey plates. Original individual boxes. A good replacement tube for traditional Fender guitar amps, not a good choice for modern high gain amplifiers. Very limited stock. EACH $39.

2. ECC83 'Flat Plate' Telefunken style tubes manufactured by E.I. of Yugoslavia. Late 2003 production, grey coated plates. Good choice if your're looking for a somewhat warm sounding 12AX7/ECC83 tube for guitar amps and hi-fi. These blow away the nasty sounding Russian 12AX7s used by most guitar amp manufacturers these days. We just received the nicest batch of these tubes I've ever seen or heard; they're much less prone to microphonics than earlier versions due mainly to a beefier plate structure. We test each and every one of these tubes in the input stage of a Marshall Super Lead 100 and guarantee them against failure (but NOT microphonics...) for 30 days. Don't waste your money on gold plated pins or fancy boxes; there's only one version of this tube currently available, despite what you may have read elsewhere. $14.99.
3. 5751 JAN GE '80s NEW OLD STOCK, original individual military boxes. Slightly lower gain pin compatible 12AX7 type. Like 12AY7s, the 5751 is favored as a lower gain alternative by blues players for the first gain stage of older Fender amps. EACH $29.

12AY7 TUBES FOR FENDER TWEED BASSMAN
1. 6072/12AY7A General Electric JAN '80s N.O.S., made in USA! Try these in the first gain stage of your original or reissue 4X10" Bassman etc. for a taste of the early '50s sound. Very similar in construction to a 12AX7 but lower amplification factor/smoother sound favored by some blues players like the great harpist Thomas Dore of Columbia, Maryland, no lie. Some early Fender tweed amps came stock with 12AY7 (check out those old tube charts). These nicely made "black plate" tubes are also popular with High End audio enthusiasts (AKA "hi-fi nuts"). Good stock on hand today. Amplification factor of this "medium mu" twin triode is around 44, while a 12AX7 is rated at 100. EACH $59.

12BH7 FOR MAGNATONE, AMPEX, ALTEC AND OTHER VINTAGE AMPS

12BH7

1. 12BH7 RCA '70s N.O.S., MADE IN MEXICO (!!!!), looks almost identical to MADE IN USA version. Good choice for affordable repairs. We've sold hundreds of these all over the world over the past five years. Reliablility has been excellent. Good stock on hand. EACH $19.

12DW7/7247 FOR VINTAGE AMPEG SVT, EICO AMPS, ETC.
1. 7247/12DW7 General Electric '60s N.O.S., good choice for repairs to Ampeg guitars amps and vintage hi-fi. Bulk packed manufacturing stock so no individual boxes. Fourteen pieces left to sell. EACH $29.
2. 7247/12DW7 General Electric, individually boxed. Six to sell. EACH $39.

EF86 FOR VINTAGE VOX AND HI-FI GEAR
1. EF86 Amperex '70s N.O.S., "MADE IN HOLLAND", orange print, mesh plate. Premium quality for any application. Only a few to sell. $39.
2. 6267/EF86 "General Electric", tube stamped "NEC" but looks like a mesh plate Western European tube! Tested and guaranteed. One to sell. $22.
3. EF86 MULLARD/IEC NEW OLD STOCK, '70s, stamped "MADE IN HOLLAND", mesh plate, probably manufactured by Amerex. Only one like this to sell. $39.
4. EF86/6267 Tung-Sol, "WEST GERMANY", diamond bottom, probably manufactured by Telefunken, shiny round plate structure. Only one to sell. $39.
5. EF86/6267 General Electric, "GT. Britain", grey round plate structure. One to sell. $29.

5755 RAYTHEON KILLER INPUT TUBE
1. Originally designed as a "DC amplifier", these 5755 dual triodes are equivalent to the Western Electric 420A with the same "9 pin miniature base". Similar operating characteristics as for 6SL7, some say, box plates. Useful as an input/preamp tube in your bold new guitar amp or hif-fi design? I just heard these 5755s in a very nice DHT 6B4G amp and they kick some serious ass. Good stock still on hand now. EACH $5.50.

5879 FOR GIBSON AMPS, GATES GEAR, ETC.
1. 5879 Philips/Sylvania, 1985 vintage, MADE IN USA, shiny round plate structure, individually boxed. EACH $9.50.

UNLESS OTHERWISE STATED IN OUR WEB SITE DESCRIPTIONS, ALL NEW AND N.O.S. TUBES ARE GUARANTEED AGAINST FAILURE FOR 30 DAYS FROM DATE OF SHIPMENT: WE OFFER REPLACEMENT OR REFUND (OUR CHOICE) IF A TUBE FAILS IN NORMAL SERVICE EXCLUDING ABUSE. WE DO NOT ACCEPT RETURNS OF NON DEFECTIVE NEW OR 'NEW OLD STOCK' TUBES. WE DO NOT GUARANTEE OUR TUBES AGAINST MICROPHONICITY, "NOISE", DISTURBING SONIC PHENOMENA THAT RESULT FROM WIGGLING THE TUBE IN ITS SOCKET OR BANGING THE TUBE WHILE AN AUDIO DEVICE IS IN OPERATION, FAILURE TO MEET TESTING/MATCHING STANDARDS ON ANY EQUIPMENT OTHER THAN OUR OWN, ANXIETY PROVOKING 'BLUE GLOW' SIGHTINGS, 'LACK OF A HAPPY SPRINGTIME SOUND' OR ANY OTHER CRACKPOT/SUBJECTIVE CRITERIA. WE OFFER NO RETURN OR REPLACEMENT WARRANTY FOR USED/TESTED TUBES; ALL SALES OF THESE ITEMS ARE FINAL.

Angela Instruments Home Page

Ordering Information

Postal Mail: Angela Instruments
10830 Guilford Road, Suite 309
Annapolis Junction, MD 20701
USA

Email: steve@angela.com
Phone: (301) 725-0451
24 Hour Fax Ordering Line:
(301) 725-8823