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In Reply to: RE: 6883B for use as a audio power tube posted by Freo-1 on August 30, 2014 at 14:36:36
...and don't forget the g1, g2 and maybe even anode stoppers.
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Good points. Back when the 1625 quad mono amps amps were made, had a problem with the amp oscillating. I found the fix over on the DIY audio website. A gent named Miles Prower suggested a plate stopper (wire wrapped around a resistor). That did the trick. I've been using the amps daily now for some time, and they are very reliable. The 1625 is one of my favorite tubes for audio (a real sleeper).
I'm hoping to have the same type of results with this project. It's a real shame that GE stopped making the 6550A tube.
"What this country needs is a good 5 watt amplifier!" (Paul Klipsch)
~!
The Mind has No Firewall~ U.S. Army War College.
...Way back in the 90s, the GE6550A wasn't held in very high regard by a lot of audiofans but they worked fine for me so I stocked up as finances would allow. Glad I did.
You were wise to stock up on them. Audiophiles are not always the brightest lot. They tend to flock to the latest craze, only to find out its not always what it is cracked up to be.
I've got a LOT of 1625's, all with 40's date codes. Never find quality like that again.
"What this country needs is a good 5 watt amplifier!" (Paul Klipsch)
One of the very first pieces of tube gear I ever brought to life was a military ARC-5 transmitter with a pair of 1625s. I was 14 then, and just smart enough to get knocked on my azz a couple times by the +400V supply I built for it. I still have a soft spot for those tubes, but I try not to build audio gear with anode caps. :O) Good luck with the project!
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