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Philco Model 87
Chas
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Posts: 658
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Joined: Apr 2018
City: S. Dartmouth State, Province, Country: MA
#13

09-06-2023, 04:17 PM
O.K!

Try the Simpson in AC mode across the primary of the output transformer, set for 100 volt scale more or less to start.

None the less, if your not getting any oscillation no matter where the dial is set, neutralization is good enough.

If either above below 1mhz is "less sensitive" when aligning the gang trimmers, move the calibration frequency up or down in the direction of the less sensitive area by about 30khz, more or less. That should balance out the sensitivity across the band. May have to neutralize a second time with that sort of compensation...

GL

Chas

Chas
Pliny the younger
“nihil novum nihil varium nihil quod non semel spectasse sufficiat”
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Messages In This Thread
Philco Model 87 - by fwmartin2000 - 08-29-2023, 07:28 PM
RE: Philco Model 87 - by MrFixr55 - 08-29-2023, 08:07 PM
RE: Philco Model 87 - by Radioroslyn - 08-29-2023, 08:17 PM
RE: Philco Model 87 - by morzh - 08-29-2023, 09:35 PM
RE: Philco Model 87 - by radiorich - 08-29-2023, 11:15 PM
RE: Philco Model 87 - by fwmartin2000 - 08-30-2023, 10:53 AM
RE: Philco Model 87 - by Radioroslyn - 08-30-2023, 11:19 AM
RE: Philco Model 87 - by morzh - 08-30-2023, 06:16 PM
RE: Philco Model 87 - by fwmartin2000 - 08-30-2023, 08:22 PM
RE: Philco Model 87 - by Chas - 08-30-2023, 10:43 PM
RE: Philco Model 87 - by morzh - 08-31-2023, 09:08 AM
RE: Philco Model 87 - by fwmartin2000 - 09-06-2023, 02:16 PM
RE: Philco Model 87 - by Chas - 09-06-2023, 04:17 PM
RE: Philco Model 87 - by fwmartin2000 - 09-07-2023, 07:51 PM



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  1. The PHILCO Phorum
  2. Philco Radio Discussions
  3. Philco Electronic Restoration