RE: photo 3

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In Reply to: photo 3 posted by akltam on February 10, 2016 at 06:25:14:

I think you may have some layout issues. The crowding around the 6SL7 is just begging for trouble. A straight line layout with smallest signals at one end and largest signals at the other would be much more likely to be stable. I'm also wondering if you need that much gain - can you change a few values and replace the 6SL7 with a 6SN7? Regarding the discussion about grid stoppers, the higher values being suggested shouldn't be necessary. I've built dozens of 6SL7 stages for prototyping various designs, and the only one that ever oscillated had its grid pin within an inch of a third stage anode. Except for that one layout error on my part, 1K carbon comp grid stoppers have always been sufficient.

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Parts Connexion

Follow Ups Full Thread

Topic - Help on oscillation. - akltam 05:41:33 02/09/16 (11)

RE: Help on oscillation. - Triode_Kingdom 20:14:21 02/09/16 (5)

photo 3 - akltam 06:25:14 02/10/16 (1)

RE: photo 3 - Triode_Kingdom 16:14:28 02/10/16 (0)

photo 2 - akltam 06:22:45 02/10/16 (0)

photo 1 - akltam 06:21:40 02/10/16 (0)

RE: Help on oscillation. - akltam 05:52:07 02/10/16 (0)

RE: Help on oscillation. - Chip647 06:14:21 02/09/16 (4)

RE: Help on oscillation. - akltam 06:52:40 02/09/16 (3)

RE: Help on oscillation. - Michael Samra 00:51:47 02/10/16 (1)

RE: Help on oscillation. - akltam 05:44:55 02/10/16 (0)

That should work, but - Ralph 11:05:50 02/09/16 (0)

Follow Ups

RE: photo 3 - Triode_Kingdom 16:14:28 02/10/16 (0)

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