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An Important Note About NOS Tubes. Please Read.
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The 6V6 is a family of octal based beam power pentodes which were widely used in mono and stereo amplifiers, musical instrument amps, and in the audio outputs of television, motion picture and public address equipment. They were very popular in the USA during the period of 1940-1970 as they were inexpensive to make, and packed a pretty good audio punch in a small octal based package. Vintage tubes are currently available in three styles: a large ST shape (coke bottle) envelope which is the 6V6G and is the earliest type of 6V6; a smaller GT package encompassing the GT, GT/G, GTA, and GTY suffixes, and a metal jacketed envelope which is usually found on the 6V6 with no suffix in the number.
Most of the action today with vintage 6V6 tubes centers around the smaller glass GT package. This is the type most often found in electric guitar amps, and the current desire for the "tube sound" has caused demand for these tubes to skyrocket. Unfortunately, the modern made Russian and Chinese versions of the 6V6 often cannot handle the high plate voltages some of these amps use, and they self destruct in a bright laser light show. Only the USA made vintage 6V6 tubes will do. Any of the 6V6 USA made tubes I list here should work fine in any amp calling for 6V6 or 7408 outputs. ALL of my vintage 6V6 tubes have the full octal base, with the black bakelite going up one inch on the sides. These are NOT the later 1970s "coin" or "wafer" base which are considered inferior by many. NOTE: the adhesive that bonds the bakelite base to the glass is often dry and fragile in these old tubes. NEVER pull an octal tube out of the socket by the glass, as this will often break the adhesive bond. A slightly loose base will not affect the operation, sound, or lifespan of the tube. If you accidently break a base loose, you can re-bond the base with a thin bead of gel-type super glue or marine varnish. The metal jacket version of the 6V6, labelled 6V6 with no GT in the suffix, has basically undergone no changes since it's introduction in the late 1940s. It is the SAME tube inside as the GT types, is the same height, and will work perfectly in any circuit calling for a 6V6. You may want to check out the metal 6V6, as they are currently priced less than all the other types, and will still give you that great tube sound. IMPORTANT NOTE: You should ALWAYS check and/or adjust your amp output tube's bias settings when replacing 6V6 or ANY power output tube!
The differences in the GT package you will find listed below are basically these:
The 6V6G This is the original type of this tube, and dates back to the late 1930s. It is easy to spot, as it is much larger than any of the GT or metal type envelopes. It is a large ST shape (coke bottle) tube, and without looking at the label can be confused with a 6L6G. Most examples I have seen have a gray RF shielding sprayed on inside the glass, making the interior difficult to see. These are the tube of choice for authentic retubing of antique radios that used this tube, although a GT, GT/G, GTA, or metal type will replace the G type directly. Very retro looking in 6V6 powered amps, but chassis space is a consideration if you are swapping out a set of GT tubes, as these are much taller and wider.
The GT and GT/G usually have "greyglass", which is an RF shielding sprayed on inside the glass and hiding the plate from view, and is often streaked from where the spacers were inserted during manufacture. The coating ranges from pale grey in RCA to heavy black in GE and Ken-Rad. Most of these are blackplate and are the earlier type of GT. The Joint Army Navy military spec 6V6GT tubes look very similar, and will always say "JAN" on the base. Often, they will also be labelled as VT-107A. These are fine quality military spec tubes that are becoming rare. The RCA greyglass 6V6GT has become such a "fad" tube that worldwide stocks of this out-of-production beauty are vanishing at an alarming rate. I have great difficulty finding them and then they sell out as soon as I get a few. Take heart, as RCA made this tube for other manufacturers. If you see a light greyglass, blackbase with silver lettering that says GM, Delco, Crosley, Motorola, Magnavox, Admiral, Fender (just to name a few), RCA made them. These are EXACTLY the same tube as the RCA labelled 6V6GT greyglass. Some of the earliest versions of this tube had a nickel collar around the base, Tung Sol and GE to name two brands, and these are rare and collectable today. NOTE: the adhesive that bonds the bakelite base to the glass is often dry and fragile in these old tubes. NEVER pull an octal tube out of the socket by the glass, as this will often break the adhesive bond. A slightly loose base will not affect the operation, sound, or lifespan of the tube. If you wish, you can re-bond the base with a thin bead of gel-type super glue or marine varnish.
The GTA is nearly always clearglass, and may have either a bottom or top mounted getter, grey or black plate, and is the newer version of the 6V6. The GE and GE made GTA types have controlled heater warm up also.
The GTY type will always have a brown micanol (low loss) base, but otherwise could be either clearglass or greyglass. Often, the Joint Army-Navy military spec tubes will be brownbase, but NOT ALWAYS! Some JAN tubes are blackbase, but they ALWAYS will say "JAN" on the label. JAN tubes are built a bit more rugged than their civilian counterparts, and may be a good choice for musicians who take their amps on the road. These tubes, while out of production, are still plentiful, due to the heavy demand for the RCA 6V6GT. The GTY is actually a better tube, and smart 6V6 buyers will stock up on a few now, as these are bound to be tomorrow's "fad" tube.
7408 This is the industrial version of the 6V6. As far as I have seen, only glass versions were made, but it is possible there are some metal jacket types out there, but their appearant rarity leaves them out of consideration here. I have seen both clearglass and greyglass versions. They should perform on par with the military spec types, and are absolutely interchangeable with any 6V6 type. They were never plentiful, and today are rather hard to find. If you are replacing a 7408 and I am out of stock, any of the military spec tubes will work nicely as a substitute.
5992This is a military/industrial version of the 6V6GT, and is rather rare. I have only seen versions labelled Bendix, but GE lists it in their Characteristics book so they must have made some as well. These have rugged brown micanol bases, heavy glass, a short boxy black plate structure, three mica spacers and dual top mounted D getters. This is probably the ultimate holy grail tube to have in the 6V6 world, but their scarcity today keeps them in a fairly obscure corner of that world. Clients tell me these blow away even the NOS RCA blackplate greyglass tubes! They are indeed awesome, and will never be made again. All of these tubes glow blue inside and have slightly longer warm-up time than the 6V6GT, this is normal. They are plug and play compatible with any 6V6 type tube, with normal bias checks and/or adjustments as you would do whenever replacing any power tubes. These are worth seeking out as they are built like a tank and may outlast both you and your amp!
ALL of these vintage tubes will outperform any of the modern made junk, and the demand has grown to the point where I feel many will benefit from this detailed 6V6 list on my site. Please e-mail me if you have any questions.
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Tube |
Description | Price Each |
Quantity In Stock |
5992 Industrial / military grade 6V6GT, Bendix MATCHED PAIR |
New Old Stock whitebox, RARE. Rugged military tubes from the Bendix Avaition Corporation, heavy glass, tan bases, triple mica, short boxlike blackplate, dual top D getters. This is a 6V6GT in army boots, yet it is a plug-and-play replacement for any 6V6 tube. An awesome sounding tube in both guitar amps and hi-fi systems! The rarest and the best, may outlast you and your amp! You think RCA greyglass tubes sound good, wait 'till you hear these babies. Large military job boxfull just in, matched to within several percent Gm and plate current!SINGLE TUBES ARE $100 EACH. |
$200.00 per pair |
0 |
5992 Industrial / military grade 6V6GT, Bendix, cosmetic blemish MATCHED PAIR |
New Old Stock whitebox, RARE. Rugged military tubes from the Bendix Avaition Corporation, heavy glass, tan bases, triple mica, short boxlike blackplate, dual top D getters. These are the same rare tubes as the perfect examples above, but this batch was stored upside down in an open jobbox. Many have discolored bases, some labels are not good, some may be military equipment pulls, but all test as NOS. I've been told I'm giving away these rare dudes at this price. This is a 6V6GT in army boots, yet it is a plug-and-play replacement for any 6V6 tube. An awesome sounding tube in both guitar amps and hi-fi systems! The rarest and the best, may outlast you and your amp! If you are not too picky about appearance, you can save BIG with these less than pretty tubes. You think RCA greyglass tubes sound good, wait 'till you hear these babies. Large military job boxfull just in, matched to within several percent Gm and plate current! SINGLE TUBES ARE $45 EACH. |
$100.00 per pair |
0 |
6V6GT Raytheon Nickel metal collar base, Blackglass, RARE 1940s vintage MATCHED PAIR |
New old stock whitebox. Very scarce tube, with the bright nickel collar around the base. Rich and creamy sounding, and nearly impossible to find in matched pairs, especially the blackglass version. |
$150.00 per pair |
0 |
6V6G (ST shape) RCA blackplate greyglassMATCHED PAIR |
New old stock White Box. Pre-WWII era 6V6, large ST (coke bottle) shape. A very nice pair with a Gm match within 5 percent. These have the early 1940s RCA label on the base, and are greyglass. Hard to find these in matched pairs! |
$50.00 per pair |
1 pair |
6V6G (ST shape) RCA blackplate greyglass |
Used tested good, White Box. Pre-WWII era 6V6, large ST shape. A few are labelled with other brands, but are RCA made. |
$19.00 |
3 |
6V6GT Brimar or Mullard greyglass made in England |
New Old Stock original box and white Box. A very nice 6V6, not often found in the USA. Blackplate and greyglass, very similar to the RCA greyglass. Also have Australian Mullard made AWA 6V6GTA clearglass. One is made for Haltron. Also have 1 small envelope G shape, $40.00. |
$35.00 |
1 |
6V6GT RCA blackplate clearglass MATCHED PAIRS |
New old stock original box or whitebox. Very scarce tube, as most RCA clearglass types had greyplates. These excellent RCA tubes are from the late 1950s, and have been carefully matched into pairs. |
$78.00 per pair |
0 |
6V6GT RCA blackplate clearglass |
New old stock original box or whitebox. Very scarce tube, as most RCA clearglass types had greyplates. 1 made for Hammond organ. |
$38.00 |
2 |
JAN 6V6GT / VT107A TYPE JAN RCA made blackplate greyglassMATCHED PAIRS |
New old stock White Box and original box. The rare military version of this wonderful RCA greyglass vintage tube. Difficult to keep in stock as supplies dwindle and demand soars. This version is probably one of the the best guitar amp tubes ever made. These are extra rugged, look and sound the same as the famed RCA GT blackplate greyglass civilian version, and are very carefully matched! Most have the National Union or Sylvania label, some RCA, but are greyglass GT, the same RCA tube as the original GT listed below. THE RCA made tube to have if you need durability and long life! |
$100.00 per pair |
4 pairs |
6V6GT / VT107A JAN RCA blackplate greyglass |
New old stock White Box and original box. The rare military version of this wonderful greyglass vintage tube. Difficult to keep in stock as supplies dwindle and demand soars. Made for various brands but all are RCA made. |
$45.00 |
4 |
6V6GT RCA blackplate greyglass MATCHED PAIR |
New old stock White Box and original box. Very popular vintage tube, in fact the most asked-for tube for Fender amps. Difficult to keep in stock as supplies dwindle and demand soars. I have hand selected and matched these on a Hickok 539A, closely matched for Gm and plate current draw. |
$90.00 per pair |
4 pairs |
6V6GT RCA blackplate greyglass |
New old stock White Box and original box. Very popular vintage tube, singles perfect for the Fender Champ. Difficult to keep in stock as supplies dwindle and demand soars. |
$40.00 |
0 |
6V6GTY JAN RCA blackplateMATCHED PAIRS |
New Old Stock whitebox and original box. These are similar to the standard RCA clearglass or greyglass, but have brown bases and are milspec. Carefully matched pairs. SINGLE TUBES ARE $35.00 EACH. |
$74.00 per pair |
0 |
6V6GT RCA made for Mullard, Haltron, Amperex blackplate greyglass |
New Old Stock whitebox. Deep black internal glass coating, blackplate, bottom getter. Same excellent RCA greyglass tubes, made in the USA for export to Britain. |
$28.00 |
2 |
6V6GT RCA blackplate greyglass |
Used tested good White Box. Very popular vintage tube. Difficult to keep in stock as supplies dwindle and demand soars. Even used ones are much better than the junk being made today. Matched pairs are just $50.00. |
$18.00 |
7 |
6V6GT made by RCA, OEM labels, blackplate, greyglass and blackglass |
New Old Stock White Box. Made by RCA for Admiral, Bogen, Emerson, Ford,Philco, Sylvania, Delco, Marconi, and Magnavox. EXACTLY the same as those labelled RCA, with the RCA factory "stop-sign" logo! Expect to see these skyrocket in price as the RCA tubes become scarce. Save now while you still can! MATCHED PAIRS JUST $50.00 PER PAIR! Construction varied slightly depending on production year, some are rare blackglass types, all are RCA tubes. |
$19.00 |
12 |
6V6GTA RCA greyplate clearglass MATCHED PAIRS |
New Old Stock original Box. These are carefully hand selected and matched to within 2 percent of each other, plate current and Gm. Especially good in Fender amps. Like all RCA 6V6 tubes, these have bottom getters. These are the best of the late 1960s RCA 6V6 tubes, and prices are climbing so grab some now! |
$75.00 per pair |
1 pair |
6V6GTA RCA made greyplate clearglass |
New Old Stock white Box and original box. This tube is also popular, especially good in Fender amps. Like all RCA 6V6 tubes, these have bottom getters. Several are OEM made by RCA, and labelled with different amp brands. |
$30.00 |
5 |
6V6GT / VT-107A JAN Raytheon, blackplate greyglassMATCHED PAIR |
New Old Stock whitebox. Deep black internal glass coating , blackplate, bottom getter. These milspec tubes date to the 1940s and have black bases. A nice pair matched to within 2 percent Gm and plate current draw. Grab them now, they're going to vanish just like the RCA greyglass! |
$75.00 per pair |
1 pair |
6V6GT / VT-107A JAN Sylvania, blackplate greyglassMATCHED PAIR |
New Old Stock whitebox. Deep black internal glass coating , blackplate, bottom getter. These milspec tubes date to the 1940s and have black bases. A nice pair matched to within 2 percent Gm and plate current draw. Grab them now, they're going to vanish just like the RCA greyglass! |
$75.00 per pair |
0 |
6V6GT / VT-107A JAN GE, Ken Rad, Hytron, Sylvania, blackplate greyglass |
New Old Stock whitebox. Deep black internal glass coating , blackplate, bottom getter. These milspec tubes date to the 1940s and have black bases. Actually, these brands are all pretty much the same bullet-proof military tubes. Grab them now, they're going to vanish just like the RCA greyglass! |
$21.00 |
8 |
6V6Y military, metal, RCA MATCHED PAIR |
New old stock, original Box. A great military version of the late 1940s metal can 6V6. I have evaluated these in my amp and they sound every bit as good as the glass types. Built like tanks, will last a long time in service. |
$65.00 per pair |
1 pair |
6V6GT National blackglass, black plate. |
New Old Stock Original Box. A decent early 1970s vintage tube. MATCHED PAIRS ARE JUST $30.00! |
$10.00 |
3 |
6V6GT Tung Sol blackplate blackglass MATCHED PAIR |
New old stock original box or whitebox. An excellent, creamy smooth sounding late 1950s vintage 6V6 tube, USA made by Tung Sol. |
$80.00 PER PAIR |
3 pairs |
6V6GT Sylvania blackplate greyglassMATCHED PAIR |
New Old Stock whitebox. Heavy internal glass coating, blackplate, heavy top getter flashing (chrome dome). These have the green or red labels on black bases of the late 1940s, and have a nice Gm match to within 4 percent. These sound like the RCA at a big savings! SINGLE TUBES ARE $35.00 EA. |
$70 per pair |
4 pairs |
6V6GT General Electric blackplate greyglass, silver gothic print lettering on base |
New Old Stock Original Box and whitebox. Deep black internal glass coating, blackplate, bottom getter. These are the really old, scarce, 1940 vintage tubes. |
$25.00 |
0 |
6V6GT General Electric blackplate greyglass |
New Old Stock Original Box and whitebox. Deep black internal glass coating, blackplate, bottom getter. Some are marked Ken-Rad but are GE made. |
$20.00 |
10 |
6V6GT General Electric clearglass, black plate. |
New Old Stock Original Box and whitebox. Bottom getter, the blackplate is the older version. |
$15.00 |
9 |
6V6GTA General Electric clearglass, grey plate. |
New Old Stock whitebox. These are from a nice late 1960s job box of GE tubes. Fantastic quality, bargain price, these will outperform any of the current production trash out there! |
$15.00 |
12 |
6V6GTY JAN Raytheon, MATCHED PAIR |
New Old Stock Original Box and whitebox. A nice pair of military greyglass 6V6 tubes, built to last! Brownbase, blackplate, bottom getter. |
$60.00 per pair |
0 |
6V6GTY JAN Sylvania blackplate greyglass |
New Old Stock Original Box and whitebox. These are all brownbase with top halo getters. A fine milspec tube that is becoming scarce. One made for Electronic Enterprises but is military JAN Sylvania. MATCHED PAIRS, WHEN AVAILABLE, ARE $50.00. |
$18.00 |
6 |
6V6GTY JAN Raytheon, Hytron, CBS, GE |
New Old Stock Original Box and whitebox. All military spec tubes. Deep black internal glass coating on the Hytron, grey on the Raytheon. Brownbase, blackplate, bottom getter. |
$18.00 |
7 |
6V6GT/A Other USA made brands, glass or metal envelope |
New Old Stock Original Box and whitebox. Five are metal jacket types. Many USA vintage brands too numerous to mention. Most are greyglass with blackplates. |
$15.00 |
80 |
6V6 metal, RCA |
New old stock, original Box |
$15.00 |
2 |
6V6 metal, General Electric |
New old stock, original Box |
$15.00 |
0 |
7408 GE,Industrial grade 6V6GT, full octal base. |
New Old Stock original box. Nice heavy duty 6V6GT on par with the GTY and VT107A military types. These General Electric tubes are from the 1960s and built like tanks! MATCHED PAIRS (1 pair available) ARE $70.00 PER PAIR. |
$30.00 | 3 |
7408 Industrial grade 6V6GT, various brands |
New Old Stock whitebox. Nice heavy duty 6V6GT on par with the GTY and VT107A military types. MATCHED PAIRS, WHEN AVAILABLE, $50.00 PER PAIR. |
$20.00 | 4 |
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