Got a large grab bag of tubes today

[whomeno]

So far I have found 8 ge 12au7 tubes. 1 ge 12ax7 tube 2- 12bh7 tubes.
What other tubes should I be looking for in pre amp and power tubes.
Thanks

[whomeno]

Just put in 2 ge 12au7's. all I can say is WOW! I had 2 12au7's made in china  from amplified parts in. What a differance!!!!!!

[printer2]

Into what?

[whomeno]

sorry dual valve caster

[rutabaga bob]

See if there any 6AJ5s in your stash.  Use in a Lonewolf pentode booster.

[whomeno]

Still going through them I will let you know 6AJ5's

[Marcos - Munky]

It's probably easier to make a list of what you have, so we can suggest you what to do with them.

[whomeno]

marcos
That is what i am doing now. will not be in order but a long long list
Rutabaga--- no no 6aj5's

[thermionix]

If you see any RCA 6L6GC tubes with black plates, you don't want those.  They are dangerous, and can explode and poison your dog.  I manage the only certified disposal unit in this part of the country.  The service is free, but you must cover the cost to ship the deadly devices to our facility.  They must be packed with ample padding all around, equivalent to 1.5" of bubble wrap minimum, to keep the glass envelope from cracking, and the explosive, poisonous contents from spilling out.  Sorry, but it's the law.

[whomeno]

Here is the list


these are all vintage tubes from 50's  60's and 70's
6hs8       6cm6      6c6g8a      6cb6      5ea8        3dt6       654a       25c5      6fq7       8BQ5        6BQ6
6AL5     6AU4       68Z6          GAU6      6CG7       6H26     210         12CA5    6LQ6     2CY5      6A05               
3A3A     6GH8A    5X8           PHILLIPS 41          1B3GC       6BL8      6CG8A       6U8A     6WG1      12B4A
12HG7     2GK5     5G3     PHILCO 75   CBS  210 35L6GT     6X5GT   6KM6   1VU    100E7    6CB6A   
6GH8A    3GK5   6JC6    6AM8     6BZ6    6CLG   0A3    3BZ6   6CB6    3DK6    5751    6X8     6BQ5
6AV6    6D5GA    6C4   DH25   2AV2    5AQ5   6BZ6   3DT6    12B4A    6AU4    6ZX2    5U8   6GH8A
6BQ6GA   6AX4   139   50L6   6BQ7A    6JC6A   6GH8A   6FO71     100E7    6AW8A    JEA8    6FQ7
3BZ6    3BH6   6AM8   35Z5   6BQ7   6CB7    5AM8   6FQ71   25L6GT   6AW8A   25BQ6GT 
6AL5   6CB6A    6SL7   6W6GT   3A3   6DQ6   LY188 GAX4   50L6   6DN7    PHILCO 1063 
6SN7   12AF3   6EA8   SGH8   SCG8   GGF7A   38HE7  12BR7    3DT6   6BZ6   6CL6   6AQ5A   6AQ5 
12BR3  6DK6   11BM8   9AU7   1R5   JCR9004 VT-120 5642 CK5642   6GH8A   12BY7A   12BA7
12HL7   12B4A   12AZ7   12AF6   12BA6   12AV6   12BH7   12ED5   1AM4   5U8  6BE7   6BN6  3GK5
1R5   6KZ8   6BC8   3DT6   6AL5   6CB6   1G3GT   6AX4   6J6   4GK5   3V4   6GH8A   6AM8A
1U5   8FQ7      9A8/PCF60     46S5   10GK6   6AU6   50C5   10EY8    6AM8   5879   6DT6   6AV6
6GM6   5EA8    5AM8    6C4   8FQ7    3Q4   1105   6LU8   6U5   6MD8   1U4   6AF5   6KT8   35EH5
8FQ7   6AK6   12BA6   12BA4    6CJ3    6SN7    6KJ8   13DE7   2FH5   4BQ7   50B5   5LJ8   C88C   6EJ7   3BN6    6AK6   6T4   10GK6    6AW8A    6BZ7   6AH6   PHILCO 260   4DE6  6KT8   6LM8   4KT6   6AL6   6BR8   4CB6  3HQ5   3V4   17DW4A    PHILCO 1N5  6AW8   6QB6   6FQ7   8AW8   12CN5   3BU8
6EH7  5BR8   3CY5   10KR8   12AF5   5FU8    6CG3   6F7   6A8   1H5   21J26   6AT2   GSN7   1G3GT   1A5    5U4GB   1J3   6DW4D   65N7   3A3C    6AU4   PHILCO 76   6J5GT   6CD6   50C6   6BX7    80    3A3A
6A7  6LR6   6KD6    12DQ6    5U4

[Slowpoke101]

Good selection of tubes to sort through. I haven't heard of some of them for years. I have no suggestions as what to build with any of them just yet but I'll have a think about it.

If you see any RCA 6L6GC tubes with black plates, you don't want those.  They are dangerous, and can explode and poison your dog.  I manage the only certified disposal unit in this part of the country.  The service is free, but you must cover the cost to ship the deadly devices to our facility.  They must be packed with ample padding all around, equivalent to 1.5" of bubble wrap minimum, to keep the glass envelope from cracking, and the explosive, poisonous contents from spilling out.  Sorry, but it's the law.

A wonderful service that you are offering there Thermionix  I may have to try offering that very service myself 

[anotherjim]

6SN7 is a well loved type. Like a 6v heater 12AU7 in an octal base?
Look out for triode + pentode tubes in 6xx8 numbering.

[EBK]

Why are there no pics of what a large grab bag of tubes looks like?  Please?

[antonis]

Why are there no pics of what a large grab bag of tubes looks like?  Please?

Maybe because we don't know if eachone of listed type consists of only 1 piece..

[EBK]

Why are there no pics of what a large grab bag of tubes looks like?  Please?

Maybe because we don't know if eachone of listed type consists of only 1 piece..

[whomeno]

Anothejim here is the list I got in 6xx8 and 6sn7

6sn7gtb-4
6sn7gt-4
6sn7gta-1


6xx8

6LU8- 1
6MD8 - 1
6AM8A-4
6LJ8 - 1
6KT8 - 2
6AW8 - 5
6KZ8 - 1
6GH8A - 6
6CG8A - 3
6LM8 -1
6CX8 -1
6EA8 -1
6BL8 -1
6LE8 -1
6JR8 -1
6BC8-1




Here are the pics

[anotherjim]

6GW8, 6BM8 would have been nice, they are audio pre/power amp tubes. I'm not sure if any of those you have are close. Most appear to be TV CRT tube deflection & stuff.
http://www.r-type.org/search.php
I usually look there, but it hasn't heard of many of those.
I have a suspicion that 12BR7 can be used in low power amp output, including headphones with a suitable output transformer.
Pretty much any triode or pentode can be used to wiggle an audio signal, but many that are not well known already as audio parts turn out to be microphonic and/or inefficient heater power in comparison.

6BQ5 is good - an EL84 audio power tube.

[amptramp]

Don't underestimate sweep tubes for audio.  The main difference between sweep tubes and other audio output tubes is the screen grid voltage is usually limited to something like 175 V or 200 V.  A pair of 6BQ6's with a 300V plate supply and biased with a 270 ohm cathode resistor and the screen voltage regulated to 150 volts will produce 25 watts.  With grounded cathodes and a grid bias of about -30 volts, you could get 30 watts out of it.   You use an output transformer with a plate-to-plate impedance of 4000 ohms.

The 6DQ6 was a more powerful tube with a proportional increase in transconductance but the same bias voltage requirements so you could take out the 6BQ6's, replace them with 6DQ6's and get maybe 35 watts (if you can source the plate current).

Just think - an amplifier where the output tubes have plate caps and there is a VR150 voltage regulator glowing argon arc pink.  People will take notice.  It will look butch.  And it should sound pretty good, too.

[ElectricDruid]

Wow! That's a little gold mine!

The first oscilloscope I ever bought was the only oscilloscope I could afford, which cost me £50 and came from a radio ham. It turned out it was a Marconi 1965 valve-based beastie that weighed 25kg and doubled up as a space heater in the winter. It must have been about 35 years old when I bought it. Still, it worked ok, except for the TV triggering module which I wasn't interested in since I needed it for audio. Over the years I had it, more and more tubes in it started to die and features would drop out until eventually I retired it. It would require someone with a huge stash of random tubes including TV and CRT tube deflection stuff to ever repair such a thing....

[PRR]

Quite a pile.

Several of your numbers, I am sure you have mixed-up "6", "G", "J" etc; or "5" and "S".

"65N7" s/b 6SN7
"GAU6" s/b 6AU6

Overall, _I_ bet this is "junk tubes". Tubes pull from service as "bad". Some may not be dead-bad, but you just do not know.

Also 90% of the cost of most tube audio is NOT the tubes but the transformers, box, caps, pots, knobs, jacks.... And there are far too many types here for any single project. So in a sense: you have assorted Ferrari pistons, but that does not help much to build a whole Ferrari.