03-23-2018, 07:24 PM
Danny,
I'm currently restoring a Philco Model 610 that has a very similar First audio/output schematic. A couple of things come to mind; one, your schematic appears to have a missing connection from the positive side of capacitor 63 to the junction of the 42 screen grid/output transformer/ field coil (white wire). Second, if that doesn't solve your problem, you need to determine where the 265 volts (300-35) is being dropped between the top of cap 62 and the 42 plate. Once we know that, we may be able to determine the problem.
Don
I'm currently restoring a Philco Model 610 that has a very similar First audio/output schematic. A couple of things come to mind; one, your schematic appears to have a missing connection from the positive side of capacitor 63 to the junction of the 42 screen grid/output transformer/ field coil (white wire). Second, if that doesn't solve your problem, you need to determine where the 265 volts (300-35) is being dropped between the top of cap 62 and the 42 plate. Once we know that, we may be able to determine the problem.
Don
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