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OTL Asylum OTL, Output Transformerless Amplifier User Group. |
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In Reply to: RE: Futterman Story w/ Ted Hammond posted by airheadair on August 15, 2012 at 20:32:57:
The alignment procedure can be a little frustrating, I use a stack of 5 simpson multimeters to monitor the bias, upper and lower screens, and upper and lower grids all at the same time, along with another meter you place in line with the bridge rectifier to monitor the Idle current. If you have all good tubes this process can be done in about a half hour, not seeing all the voltages at the same time makes it much more difficult. That's why I made up the stack of meters, when you do it this way you can get the uppers and lowers both screens and grids to match, I have been confused at times with the variations but since I'm quite anal about them being perfect I don't give up til it's right.
Which amps do you have?
If you have any questions I would be happy to help however I can.
Below is a pic of the alignment with all 6 meters.
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Follow Ups
- RE: Futterman Story w/ Ted Hammond - rhinohifi714 21:43:44 08/15/12 (2)
- RE: Futterman Story w/ Ted Hammond - airheadair 22:24:43 08/15/12 (1)
- RE: Futterman Story w/ Ted Hammond - rhinohifi714 18:09:15 08/17/12 (0)
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