January 24th, 2012, 07:23 AM
One of the places I work for used to have their own radio program. Yesterday I was going through some stuff and came across these old tubes.
I know nothing about tubes other than they sound great when it comes to amps and they have a nice glow. Any info would be great.
The list below starts at the top left.
-General Electric 6FH8
January 24th, 2012, 08:07 AM
I recognize only the 6l6gc (power amp) and the 12axy (preamp). Those are common tubes in current production amps.
Can you post a closeup of that RCA 6l6gc?
Those are worth gold if in good condition. The metal 'flashing' spot on the glass will give a fair indication, assuming the tube is basically functional.
Too bad it's only one; that means you can only put it in a single ended class A amp.
OR you'd have to drop serious cash to get a second one and HOPE that it's matched to the one you already have.:rolleyes:
The RCA 12ax7 are very nice too if they are in good condition.
Warmer and punchier than anything produced today IMHO.:)
I don't know any of the rest. I don't think they are used commonly in modern tube amps, but maybe you can find a collector or radio-enthousiast that can do something with them.
January 24th, 2012, 08:38 AM
I think some audiophile amplifiers use 6SN7s.
January 24th, 2012, 09:05 AM
What a find! I'd go back and look in every nook and cranny for more!
January 24th, 2012, 09:27 AM
The 7189 is a variant of the EL84 configuration, but with a higher plate voltage range. The 7189 operates in the 400V range, While EL84's operate in the 300V range. In most applications, you can use a 7189 in an EL84 circuit, but not the other way around.
January 24th, 2012, 03:10 PM
There were more unboxed. I'll have to grab them next Monday.