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In Reply to: RE: another pic posted by frankford on March 05, 2012 at 17:47:07
You have a shorted heater (filament) winding.
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
Follow Ups:
I just shut down the amp and the channel that wasn't' working came on for a second. Would this also fall in line with a shorted winding?
I have no idea about that. That could be a separate problem.
The heater winding just powers the heaters in the tubes.
You said you got only 3.3vac hooked up the right way?
Try it without the resistors and measure what you get.
I really do think there is a problem with the heater winding of the power transformer.
BTW In a in-directly heated tube, like the 6550, they are called heaters, not filaments. We all say filaments even when we know better.
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
took the resister off of one of the heaters, front 6550 7.35 vac second 6.33 vac.
well the oscellation returned with voltages of 5.34 on one tube and the other 5.6vac
I'm pretty much done with this thing. Thanks for all your help today. I will get hold of the manufacturer tomorrow and see what I can do about.
This isn't my first kit, probably my 9 or 10th kit and the first one to not work on me. Frustrating as heck. O well back to the dynaco 70 tonight.
Well Brian is sending me another power tranny in the next week. I will keep you all posted. Thanks again for your help.
Thanks for the heads up.
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