In Reply to: Specific Information is needed ......Define circuit posted by drlowmu on May 21, 2012 at 06:22:40:
There isn't enough info to make any suggestion.
It is 6sl7 // dc to 2a3. The setting is pretty what the book suggestded, 250vdc plate voltage, bias -45 +/- 2v, the plate current is around 55-60ma, depends on the condition of the tube. B+ is 425 +/- 3, plate ref to ground is 420v, filament ref to ground is around 170vdc.
I guess I am within the parameter except making one careless mistake. Wrong filament voltage!!
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Follow Ups
- yes, your are right - bouncy ball 18:42:30 05/21/12 (2)
- More hints on Dc amp optimization..... - drlowmu 22:09:25 05/21/12 (1)
- thank you so much. Once I have "de-bugged" everything, will try the operation point that u suggest (nt) - bouncy ball 07:25:32 05/22/12 (0)