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Old 23rd January 2010, 12:25 AM   #1
taj is offline taj
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Default Inherited these tubes. Anything interesting?

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
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Old 23rd January 2010, 01:14 AM   #2
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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!
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Old 23rd January 2010, 01:31 AM   #3
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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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Old 23rd January 2010, 02:14 AM   #4
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The 117L7 can be used to make a small one-tube AM transmitter.
Build an AM Radio Transmitter
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