12-03-2020, 08:39 AM
The OP has stated that a D521 schematic is not the same as an S.521B schematic.
malkmm - I found a Philco (UK) Service Bulletin for model S.521. It may, or may not, be the same as an S.521B but maybe it will help? I will send you a private message (PM) on this subject.
malkmm - I found a Philco (UK) Service Bulletin for model S.521. It may, or may not, be the same as an S.521B but maybe it will help? I will send you a private message (PM) on this subject.
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Ron Ramirez
Ferdinand IN