03-10-2009, 09:20 AM
Comparing the two schematics, it's obvious that there are first audio amp bias component differences, many differences in the RF/IF stages component-wise, many AVC line component differences - (delayed AVC in the 625), 620 has AVC line to IF tube, 625 does not, etc.
Chuck Schwark,
The Philco Repair Bench
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