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Philco 89B won't oscillate!
Radioroslyn
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Posts: 7,288
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#9

04-13-2016, 08:48 PM
You've got me a bit confused. The code 123 has a 77 mixer tube the 121 has a 36. If you have a 36 tube use pin 4 or if you have a 77 use pin5. http://www.nostalgiaair.org/pagesbymodel...013877.pdf

Ok now your are looking for #8 and9 (code 123)
The osc circuit is about the same just different tube.  If the connect your ohm meter to pin 5 you should be able to find a low resistance (like less than 10 ohms) connection on the osc coil that isn't directly connected to pin 5 if the coil is ok.

Terry
(This post was last modified: 04-13-2016, 08:53 PM by Radioroslyn.)
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Messages In This Thread
Philco 89B won't oscillate! - by Steve McDonald - 04-13-2016, 02:00 PM
RE: Philco 89B won't oscillate! - by morzh - 04-13-2016, 05:03 PM
RE: Philco 89B won't oscillate! - by Radioroslyn - 04-13-2016, 06:31 PM
RE: Philco 89B won't oscillate! - by Radioroslyn - 04-13-2016, 07:34 PM
RE: Philco 89B won't oscillate! - by Radioroslyn - 04-13-2016, 08:48 PM
RE: Philco 89B won't oscillate! - by Radioroslyn - 04-13-2016, 09:00 PM
RE: Philco 89B won't oscillate! - by Radioroslyn - 04-13-2016, 10:34 PM
RE: Philco 89B won't oscillate! - by Radioroslyn - 04-13-2016, 11:43 PM
RE: Philco 89B won't oscillate! - by morzh - 04-14-2016, 03:13 PM
RE: Philco 89B won't oscillate! - by Radioroslyn - 04-14-2016, 08:10 PM
RE: Philco 89B won't oscillate! - by KCMike - 04-14-2016, 10:30 PM
RE: Philco 89B won't oscillate! - by klondike98 - 05-02-2016, 06:38 PM
RE: Philco 89B won't oscillate! - by klondike98 - 05-06-2016, 03:24 PM
RE: Philco 89B won't oscillate! - by klondike98 - 05-06-2016, 05:53 PM
RE: Philco 89B won't oscillate! - by Radioroslyn - 05-09-2016, 07:51 PM
RE: Philco 89B won't oscillate! - by KCMike - 05-10-2016, 02:13 PM
RE: Philco 89B won't oscillate! - by Radioroslyn - 05-10-2016, 02:34 PM
RE: Philco 89B won't oscillate! - by Radioroslyn - 07-11-2016, 07:57 AM
RE: Philco 89B won't oscillate! - by Radioroslyn - 07-11-2016, 07:09 PM
RE: Philco 89B won't oscillate! - by Radioroslyn - 07-11-2016, 09:28 PM
RE: Philco 89B won't oscillate! - by Radioroslyn - 07-12-2016, 08:18 AM
89B DOES Oscillate!! - by Steve McDonald - 05-02-2016, 05:03 PM
89B DOES Oscillate!! - by Steve McDonald - 05-06-2016, 03:09 PM



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