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Philco Model 81B
#30

Terry,
I set the sg for 1700kc and did not get a tone at the speaker, here are the voltages
77 det/osc plate 244, screen 63, control 4.5, cathode 21
77 2nd det plate 58, screen 56, control .6, cathode 0
42 output plate 226, screen 242, control 16, cathode 0. 

tried the sg at 460, radio about 550 but didn't get a tone, stated to get a tone with the sg at about 525. I did change the 4-meg resistor on the IF transformer to 2 meg as recommended earlier in the process. I also don't notice the osc on the 2nd radio test.
I guess I need to pull the osc and rewind it again. Wish I had a good guide for what post the feedback goes to, I stupidly didnt write it down when I redid it but maybe is just needs to go in the other direction.

Well that where things are as on now, what do you think?
Thanks for your help
George


Messages In This Thread
Philco Model 81B - by texan george - 09-25-2022, 02:36 PM
RE: Philco Model 81B - by Radioroslyn - 09-25-2022, 06:49 PM
RE: Philco Model 81B - by David - 09-25-2022, 07:14 PM
RE: Philco Model 81B - by texan george - 09-25-2022, 07:24 PM
RE: Philco Model 81B - by texan george - 09-30-2022, 03:51 PM
RE: Philco Model 81B - by Radioroslyn - 09-30-2022, 09:32 PM
RE: Philco Model 81B - by texan george - 10-01-2022, 04:16 PM
RE: Philco Model 81B - by MrFixr55 - 10-01-2022, 04:40 PM
RE: Philco Model 81B - by Radioroslyn - 10-02-2022, 07:18 AM
RE: Philco Model 81B - by texan george - 10-02-2022, 07:42 AM
RE: Philco Model 81B - by falcon123 - 10-02-2022, 08:49 AM
RE: Philco Model 81B - by texan george - 10-02-2022, 12:05 PM
RE: Philco Model 81B - by Radioroslyn - 10-02-2022, 01:36 PM
RE: Philco Model 81B - by texan george - 10-02-2022, 04:05 PM
RE: Philco Model 81B - by Radioroslyn - 10-02-2022, 05:13 PM
RE: Philco Model 81B - by texan george - 10-03-2022, 12:17 PM
RE: Philco Model 81B - by radiorich - 10-03-2022, 01:30 PM
RE: Philco Model 81B - by texan george - 10-04-2022, 04:09 PM
RE: Philco Model 81B - by MrFixr55 - 10-04-2022, 09:12 PM
RE: Philco Model 81B - by texan george - 10-05-2022, 06:27 AM
RE: Philco Model 81B - by texan george - 10-21-2022, 01:55 PM
RE: Philco Model 81B - by radiorich - 10-21-2022, 02:24 PM
RE: Philco Model 81B - by Radioroslyn - 10-21-2022, 03:34 PM
RE: Philco Model 81B - by texan george - 10-22-2022, 05:26 AM
RE: Philco Model 81B - by texan george - 10-22-2022, 05:28 AM
RE: Philco Model 81B - by texan george - 10-22-2022, 01:19 PM
RE: Philco Model 81B - by texan george - 10-22-2022, 02:52 PM
RE: Philco Model 81B - by Radioroslyn - 10-22-2022, 07:43 PM
RE: Philco Model 81B - by Radioroslyn - 10-22-2022, 07:50 PM
RE: Philco Model 81B - by texan george - 10-23-2022, 03:45 PM
RE: Philco Model 81B - by Radioroslyn - 10-23-2022, 08:22 PM
RE: Philco Model 81B - by texan george - 10-25-2022, 04:46 PM
RE: Philco Model 81B - by texan george - 11-04-2022, 10:25 AM
RE: Philco Model 81B - by Radioroslyn - 11-04-2022, 11:58 AM
RE: Philco Model 81B - by RodB - 11-05-2022, 08:18 AM
RE: Philco Model 81B - by radiorich - 11-05-2022, 10:49 AM
RE: Philco Model 81B - by texan george - 11-05-2022, 02:26 PM
RE: Philco Model 81B - by texan george - 11-08-2022, 11:48 AM
RE: Philco Model 81B - by radiorich - 11-09-2022, 01:00 PM
RE: Philco Model 81B - by texan george - 11-10-2022, 11:09 AM



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