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Re: T2562 early 69 replica
Posted: Sun Aug 30, 2015 12:46 pm
by Cheech
Checking bias as we speak. Using webber bias rite.
V7 12ma 450V at idle
V6 12ma 450v
V5 10ma 450v
V4 13ma 450v
Re: T2562 early 69 replica
Posted: Sun Aug 30, 2015 1:14 pm
by Cheech
Could bias be so low that it doesnt sag the PT enough? I swapped the two outer tubes and put them in the two inner positions. Yes the glowing follows the tubes. So is not a oscillation resolved with the stoppers.
I have no idea guys. I turned up bias thinking it would lower the voltage to the screens causing the glowing to subside. The glowing did subside slightly. I was up close looking at the tubes to check the screens. I seen the tubes flicker white for a second. Scared the crap out of me. I never seen that before.
36ma at 430v its set to
15w at 430 is 34ma
17w at 430 is 39ma
I am feeding through a webber browner. My wall voltage is a tad high. Remove that out of the loop and I am gonna have to start back at the beginning. Check all voltages again. I am just really frustrated on this amp. Metroamps kits were so easy compared to this. I am gonna go get some shielding tape and shield the headbox. Maybe its causing some problems.