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In Reply to: RE: Questions about 6BG6G amp build (schematic) Grommes 216BA posted by Triode_Kingdom on May 25, 2017 at 09:06:12
That's good advice - i will keep screen connections simple. Probably can convert to Triode later to see what that's like. I don't think I need a ton of power. My only triode amp (my first build) was w/ EL34s.
Funny you should mention 1625 and 807s - I have good quads of each of those. BUT you have to commit to the oddball 5 and 7 pin sockets; can't plug in alternatives.
Follow Ups:
I believe those numbers are maximums. That's a lot of juice, will try to stay in the moderate zone.
Datasheets indicate that this tube type is rated for 20W maximum anode dissipation. TDSL shows that as well in the abbreviated specifications. However, TDSL shows AB1 operating conditions with 450V at 116mA idle current. That's over 26W per tube. Operating at full power, or 210 mA, pushes that to 47W.
TDSL shows these same operating conditions for the 6L6 and 6L6GC. In fact, the latter is the only one in this series that can be run at those power levels.
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Buy Chinese. Bury freedom.
Yeah, I knew that current draw was crazy high, but I'll have adjustments to each tube, at least that's the plan. I will measure mA at each tube.
OK, sounds like you've got it under control. Have fun with the build!
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Buy Chinese. Bury freedom.
Sorry, I had forgotten that the 6BG6G is the ST bottle. It's also one of the nicer looking tubes. Guess there's not much reason to use the less common sockets, although the 1625/807 do have a higher dissipation rating. Speaking of which, watch out for the limit if you're building a supply over +400V. The 20W rating will be easily exceeded at higher voltages.
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Buy Chinese. Bury freedom.
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