• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

Inherited these tubes. Anything interesting?

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taj

diyAudio Member
Joined 2005
My dad recently gave me his old tube caddy. Here are its contents. I recognize a couple, but the vast majority are just random numbers to me. Is there anything here amp-worthy?

..Todd

*****************************
OCTAL GLASS BRAND
*****************************
6SN7GT STRK
6SN7GT STRK
6SN7GT STRK
7591 WEST
7591 MARC
6DQ6B/6GW6 RCA
6DQ6B/6GW6 RCA
5Y3GT STRK
5Y3GT STRK
117L7/M7ET ROGR
6L6GC RCA
25W4GT WEST
6AX4GTB GE
1B3GT GE

*****************************
OCTAL METAL BRAND
*****************************
6K7 WEST
12SQ7 SYLV
6J5 STRK
6J5 STRK

*****************************
9-PIN GLASS BRAND
*****************************
12BA6 CHAN
12AT7 MARC
12AT7 MARC
12AU7A HITR
12AU7A DIXI
7199 GE
6AL3/EY88 ROGR
6BM8/ECL82 ROGR
6FQ7/6CG7 SYLV
6S4A ROGR
6X8 GE
5AT8 WEST
5CL8A GE
1S2A/DY87 MARC
1X2B CHAN
1X2B GE
5763 SYLV

*****************************
7-PIN GLASS BRAND
*****************************
6BZ6 GE
6X4 HITR
35WR SYLV
6AH6 MARC
6AU6A HITR
12AV6 HITR
12CU5 HITR
6C4 SYLV
6CU5 GE
5651/G6A GE
6202 GE

*****************************
OTHER
*****************************
6LB6 12-PIN GLASS
 
Well, I'm fairly new to tubes, but I recognise a number that have a good rep in audio:
6SN7 (preamp), 6L6 (power amp), all the 12a*7 preamp series, 7199 preamp(vintage gold as I understand), ECL82 (combo). There will be others too.
The 5Y3 and 6x4 are low current rectifiers. Good for small amp/preamp stuff.

All in all, you have a good score there!
 
The 6AU6 can be used as a small signal audio pentode.

The 7591 is a very nice power O/P type that's as easy to drive as "12" W. tubes. An honest 30 W. from a PP pair of 7591s is easy enough to do.

The 6FQ7 is electrically equivalent to the 6SN7. That tube, along with the 6X4, give you the makings of a line stage.

The 6C4 is 1/2 a 12AU7.

The 35W4 is a half wave rectifier found in transformerless (therefore dangerous) AC/DC radios. Something could be made of a pair, in a hybrid bridge rectifier setup. The 25W4 is the same tube, with a lower voltage/higher current heater.
 
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