mustang guy Posted February 2, 2014 Author Share Posted February 2, 2014 late to the party..did you check the bias after doing the re-caps? Yes I did. They were spot on! I was suspicious so I posted it in the tubes / valves forum in diyaudio and got confirmation. I got 71 ma on all 4 power tubes, and based on the schematics, pin #8 of EL37 reads 34v. Cathode resistor is 240 ohms. So, current drawn for both tubes is 34v divided by 240 = 142 mA. 71mA per tube... Quote Link to comment Share on other sites More sharing options...
minermark Posted February 2, 2014 Share Posted February 2, 2014 (edited) Ill take it for granted you recapped and rewired everything correctly, so this is my idea. I suspect when you added the ground, something does not like it. remove ground and fire it up. Edited February 2, 2014 by minermark Quote Link to comment Share on other sites More sharing options...
mustang guy Posted February 2, 2014 Author Share Posted February 2, 2014 (edited) Ill take it for granted you recapped and rewired everything correctly, so this is my idea. I suspect when you added the ground, something does not like it. remove ground and fire it up. No reason to. The amps sound wonderful. I haven't had my solid state setup on since I got the new tubes and caps broken in. These babies are DEAD QUIET. Best investment I have ever made in audio. Edited February 2, 2014 by mustang guy Quote Link to comment Share on other sites More sharing options...
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