06-19-2019, 03:31 PM
Measurments taken in circuit Using old Radio Shack 22-221 VOM :
-Resisters-
-all the dogbones measure high; the Bakelite (8) measures 250 ohms. the BC (25) measures fairly close to spec and
there is blue resister added between 6-7 (I'm gonna leave that alone!). I see a green dogbone added in parallel to original(17).
Volume Control (1) (Ant-RF coil, 0-5000 ohms) jumps all over the place
-Transformers-
-Power Transformer (24) low to no resistance, except terminals 9-6 and 6-12 (1k), and 9-12 (340 ohms).
-Filter choke (27) measures 265 ohms
-P/P input (21) is obviously a replacement, as it is rusty, and has taped wire splices. measures 1000 pri 650-590 sec.
-RF coils (2)(7)(10) no resistance as measured.
-Speaker field coil (J-D) measures 3K
-Capacitors-
-Electrolitic (31) is the big round can on top, Filter Condenser (26) is big rect. can underside, bypass (13 & 14) smaller cans
screwed to chassis back. The added Olson 'dry electrolitic' was to fix (31), I think. There is an .02 paper capacitor scabbed onto condenser (19 .01).
Plan of action:
1. take out the stuff that don't belong and make sure wiring is correct.
2. remove variable capacitor, bath in soapy water, and remove rust.
3. take out filter choke (21) and make it prettier. reinstall.
4. rebuild bakelite capacitors per Philco Library 'Bakelite Capacitor rebuild without Desoldering'
5. rebuild bypass cans and filter condenser can (use Solen)
6. replace dogbones with what? Carbon Composition?
7. fix/clean volume control (clean with 99.9@ alcohol only)
8. clean top of chassis/reinstall Var Capacitor
9. replace power cord (original wasn't that bad, but has frayed spots)
10. what else? I need all the wisdom from this forum I can get! I hate doing things twice.
11. Before any of this, order stuff I know I will need....
Regards,
Simon
