Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: blown240 on November 27, 2011, 07:03:50 pm

Title: Tubes To Have In "Stock"
Post by: blown240 on November 27, 2011, 07:03:50 pm

My amp guy wants to trade me for some of the old american preamp tubes I have and a couple of the vibrato boards from that organ.   I pulled about 15 12AX7 and 6 or so 12AU7 for him.  I still will have almost 20 of each.

I am trying to get a list together of tubes that would be nice to have in stock. Here is my list so far:

6l6 x4
6v6x4
EL84 x4
EL34 x4
EF86 or 6267 x2 or x4
6SL7 x4 or x6
KT88 or KT120 x2
5AR4 x2

I realize that I wont get all these for what I am giving him, but I am also not exactly sure what he has.
Anything I am missing?

Title: Re: Tubes To Have In "Stock"
Post by: Madison on November 27, 2011, 07:23:40 pm

12ay7 ?
5Y3 ?

Title: Re: Tubes To Have In "Stock"
Post by: ernie_jr on November 27, 2011, 08:04:25 pm

6an8 or 7199

Title: Re: Tubes To Have In "Stock"
Post by: jojokeo on November 27, 2011, 08:47:28 pm

You may want to try a 5879 that doesn't quite have as much gain as the ef86 but then usually not as microphonic either. Also, it would be appropriate/convienient as tubenit and others like using them in thier scems you can readily find here.

Title: Re: Tubes To Have In "Stock"
Post by: DummyLoad on November 27, 2011, 08:54:21 pm

you will regret letting any number of the 12AX7 go. i'd give him 10 AX and 5 AU. that's around 200 bux worth of stuff on the used market - possibly more on fleabay. what are you getting in return?

--DL

edit:

aside from what you mention you have and what others have posted:

5U4G/B - used in some older and silverface fender amps.
5881/6L6GB - orig bassman et al.
6SC7 - older fender amps and PA amps.
6SN7/5692 - not very popular in guitar amps - but used in some older amps. RCA 5692 and 5691 fetch BIG $$$.
6SJ7/5693 - pentode - used in some older fender and valco amps.
6K6 - fender reverb unit.
6AV6/6AT6 - used in one fender i know of - quite a few PA amps.
6AU6 - used in "junk bin" amps & PA amps - cool tube but hard to tame gain.
12DW7/7247  - ampeg.
12BH7 - ampeg.

Title: Re: Tubes To Have In "Stock"
Post by: blown240 on November 27, 2011, 08:58:18 pm

I have over 30 of the AX and thats what he is really looking for, but I appreciate your point.  I will have to reduce that number.  In return I am getting all the tubes for the 3 builds I have planned, and a few extra for stock.

Title: Re: Tubes To Have In "Stock"
Post by: tubeswell on November 28, 2011, 12:00:38 am

Mil-spec Russian equivalents of 5881, 6L6G, EL84, 6V6