endless tubes

[mark enger]

i have a huge resorce for tubes. power and pre amp tubes. ive never seen a lot of the numbers on the tubes what are tubes that would be worth keeping for the future. she wants a buck a tube i think she thinks there light bulbs alot of them are nos. i got a matched set of big bottle 6l6gc from national there awsome looken tubes help me out with a list i may even help you out with tubes you have looken for

[ApexJr.]

There are about 20 Tubes that have a great AUDIO use..

5AR4/GZ34
6L6GC
6SN7
6CA7/EL34
6BQ5
12AX7
12AY7/6027
5881
6550
7868

There are others but these are what I can think of right now
I have a customer looking for NOS 6JS6C's no GE's

Steve @ Apex Jr.

[Ron Worley]

I would also add:

5U4GB
6V6
12AU7
EL34
EL84
KT66
KT88
12AT7

There are more, I just can't think of them just now....

Ron

[Mach Schnell]

Also,

7189A
7591
7199
12DW7
5V3
5Y3
6CG7

[Blindog]

Also look for:

ECC83 (European numbering for 12AX7)
EF86

Mark

[Aurora]

Not neceesearly OT, but
Anyone knows if there are any CV or JAN eqvs of these ?

6V6
6L6
EL34
EL84
KT66
KT88

[CaseyJones]

Not neceesearly OT, but
Anyone knows if there are any CV or JAN eqvs of these ?

6V6
6L6
EL34
EL84
KT66
KT88

6V6 = 7408 = 5992 = who knows what Russian equivalent? 6AQ5 = electronic equivalent up to its limits, 6AQ5 has 7 a pin mini base.

5992s are killer tubes and expensive if the vendor knows what he has. Yank 'em from old DEW Line radar sets or something.

6L6 = 5881 = 7581. There are a few disclaimers. 6L6Gs, 6L6GBs and real 5881s have lower dissipation than 6L6GCs. Russian "5881s" are mil-spec "equivalent" for a 6L6GC. They're not really 5881s.

807s are 6L6 ancestors, they have lower dissipation like 6L6Gs and the 6L6GBs. The 807 has an antique base and an anode cap. Good 6L6s are pricey on the surplus market, 807s are cheap. Food for thought...

The 6BG6 is like a mutant half-breed cross between a 6L6 and an 807. The 6BG6 has an octal base and an anode cap. They're dirt cheap and worth every penny.

I could digress futher to other obscure variants, I'm going to keep my buck apiece subs "secret" for now.

EL34 = 6CA7. A 6CA7 really isn't an EL34 and an EL34 certainly isn't a 6CA7. Then again there are a lot of reissue "EL34s" that aren't EL34s, either.

EL84 = 6BQ5, straight sub, no disclaimers. A 7189 is like an uprated EL84. It sounds different. 7189s will live in circuits that eat EL84s. There's a European E84L that's more like a ruggedized EL84.

KT66s. There's nothing like the real thing! Accept no substitutes. Some tube manuals say that it's a 6L6 sub, it's not. About as close as you'll get is an EL37 which isn't quite the same, either.

KT88 = 6550 or so they say. We had some real problems with relabeled Eastern Bloc KT88s in Leslies, internal arcing and such. Thats' odd because a Leslie is a fairly conservative circuit. 6146s are a usable sub with a little re-wiring, they have an anode cap.

[Aurora]

Thanks alot!

Some years ago, I "inherited" about 20cu.ft of tubes from a couple of closed down hot line stations ( ancient military back bone comm).
Mostly signal, -lots of 12AT,AU and AX..quite some JAN and CV, a few 6550s and 6L6s, and some obscure numbers. Haven't really had the time to catalogue them yet - hopefully come new year ( I finally got my old basement space back ..about time to set up shop again!)

[Noel Grassy]

Keep your eyes peeled for the 7025, Mil-Spec 12AX7, called out in plenty of Leo's tube charts during the swingin' 60's.

Casey Jones, what's the word on the 7355 as a sub for the 6550? I have this amp chassis that takes 7355's but I never see them. It's a Hi-Fi amp
but I think the plate voltage is too high for today's 6550.

NG

[dave g]

2A3, anyone?

[Structo]

What happened to the OP?

[mark enger]

im going searching with the list you helped me make. i think she has a box of ohmite pots half dollar size. they worth snaggen. thers tones of old resisters and test equetment gear what about those old square capacitors with colored dots for values el menco sangalos i got boxs of ceramic disk caps the 1 50 and .05 50 like in the old strats im willen to trade for other tube amp stuff ill get back wiyh my findings

[Wayne]

Hell, if the prices are cheap enough, snag it all! Whatever you don't need or have immediate sale for will probably go on ebay. If all else fails, reach out to your friendly neighborhood ham radio operator - if there's a club nearby, it probably has a few "tinkerers" in the bunch.

W

[Mach Schnell]

Keep your eyes peeled for the 7025, Mil-Spec 12AX7, called out in plenty of Leo's tube charts during the swingin' 60's.

Casey Jones, what's the word on the 7355 as a sub for the 6550? I have this amp chassis that takes 7355's but I never see them. It's a Hi-Fi amp
but I think the plate voltage is too high for today's 6550.

NG

Different pinout IIRC. Pentode type almost electrically the same as the 7591A. There were a few brownface showmans with these, very rare.

[CaseyJones]

2A3, anyone?

If you have any 300Bs I'll be happy to trade 2A3s for them.

Casey Jones, what's the word on the 7355 as a sub for the 6550? I have this amp chassis that takes 7355's but I never see them. It's a Hi-Fi amp
but I think the plate voltage is too high for today's 6550.

NG

Different pinout IIRC. Pentode type almost electrically the same as the 7591A. There were a few brownface showmans with these, very rare.

I don't know if I'd screw around with 7355s. I like 7591s but they're rare enough. Which was your question, I guess...

Measure your plate voltage and reverse engineer to fit. Bear in mind that if the plate voltage is over 500 volts without tubes in the amp the voltage will come down under load... with tubes in the amp. Tube it up, spark it up, measure voltage at your first filter cap.