Quote:
Originally Posted by old_coot88
Check for ripple on the positive supply, first on the 'upstream' side of the spkr field* coming out of the rectifier (there'll be a large ripple here) and then on the 'downstream' side (top of C127A). Then at the top of C116B. The ripple should smooth out to just a volt or two and get progressively smoother the further downstream you go, such as at C116A.
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*The speaker field serves double duty as a filter choke, a common practice in old equipment.
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Yep, this is exactly how the set is behaving. Progressively less AC as I move further downstream. By the time I get to C116A the ripple is less than a volt. A real
for sure.
I thought outside the box today and considered that there was outside interference so I unplugged my LED work light transformer and every thing else on my bench to see if the problem was external to no avail.