Model 89 Cathedral

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Model 89 Cathedral

skyscraper
Famishius fantasticus

Posts: 239
Threads: 10
Joined: Dec 2013
City: Columbia, SC

#33

02-07-2014, 12:25 PM

This morning I disconnected the antenna and hooked a scope lead to pin 2 of the 36 tube. I got a nice looking sine wave, that changed in frequency with tuning. I then, out of curiosity, connected the antenna lead again. It worked! It picked up all of the local stations well with 15 feet of magnet wire, and besides a little noise (shields aren't in yet) it sounded very good. What's more, even after all the coil surgery the dial is almost spot on.

I sent some Bing Crosby over the transmitter and wished I was old enough to drink some champagne Icon_wink

Then I went to disconnect the alligator lead from the 36 (just the lead, not the probe anymore) and it went totally dead, just like before. Ugh.. I reconnected it and it worked fine again. So, it seems like it needs 6 inches of wire on the top of the oscillator primary coil in order to oscillate. I'm totally at a loss as to why that would be.. Any ideas? The cathode bias is 680pf + 6k8 ohms.

Another concern, as I mentioned earlier the transformer has leaked a bit of wax. Under full load it's getting quite warm. Not hot, but warmer than I was expecting. The buzz went away when I tightened the bolts. That isn't normal, is it? B+ is pulling about 65ma, and all voltages are correct.

(This post was last modified: 02-07-2014, 12:27 PM by skyscraper.)

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Model 89 Cathedral - by skyscraper - 01-07-2014, 04:03 PM

RE: Model 89 Cathedral - by Mondial - 01-07-2014, 11:37 PM

RE: Model 89 Cathedral - by skyscraper - 01-07-2014, 11:57 PM

RE: Model 89 Cathedral - by Mondial - 01-08-2014, 12:24 AM

RE: Model 89 Cathedral - by klondike98 - 01-08-2014, 09:35 AM

RE: Model 89 Cathedral - by skyscraper - 01-08-2014, 11:50 AM

RE: Model 89 Cathedral - by tab10672 - 01-08-2014, 02:58 PM

RE: Model 89 Cathedral - by skyscraper - 01-09-2014, 04:00 PM

RE: Model 89 Cathedral - by skyscraper - 01-13-2014, 01:17 PM

RE: Model 89 Cathedral - by Ron Ramirez - 01-13-2014, 05:36 PM

RE: Model 89 Cathedral - by skyscraper - 01-13-2014, 06:11 PM

RE: Model 89 Cathedral - by morzh - 01-13-2014, 06:45 PM

RE: Model 89 Cathedral - by skyscraper - 01-13-2014, 07:58 PM

RE: Model 89 Cathedral - by OldRestorer - 01-18-2014, 07:46 AM

RE: Model 89 Cathedral - by skyscraper - 01-19-2014, 12:34 AM

RE: Model 89 Cathedral - by OldRestorer - 01-19-2014, 07:19 PM

RE: Model 89 Cathedral - by skyscraper - 02-01-2014, 03:44 PM

RE: Model 89 Cathedral - by morzh - 02-01-2014, 08:21 PM

RE: Model 89 Cathedral - by klondike98 - 02-01-2014, 08:37 PM

RE: Model 89 Cathedral - by skyscraper - 02-01-2014, 10:35 PM

RE: Model 89 Cathedral - by Mondial - 02-01-2014, 11:34 PM

RE: Model 89 Cathedral - by skyscraper - 02-01-2014, 11:50 PM

RE: Model 89 Cathedral - by skyscraper - 02-04-2014, 04:44 PM

RE: Model 89 Cathedral - by morzh - 02-04-2014, 05:01 PM

RE: Model 89 Cathedral - by skyscraper - 02-04-2014, 08:28 PM

RE: Model 89 Cathedral - by Ron Ramirez - 02-05-2014, 01:20 PM

RE: Model 89 Cathedral - by skyscraper - 02-05-2014, 01:40 PM

RE: Model 89 Cathedral - by Ron Ramirez - 02-05-2014, 01:42 PM

RE: Model 89 Cathedral - by skyscraper - 02-05-2014, 01:56 PM

RE: Model 89 Cathedral - by skyscraper - 02-06-2014, 10:50 PM

RE: Model 89 Cathedral - by klondike98 - 02-06-2014, 11:44 PM

RE: Model 89 Cathedral - by skyscraper - 02-07-2014, 01:02 AM

RE: Model 89 Cathedral - by skyscraper - 02-07-2014, 12:25 PM

RE: Model 89 Cathedral - by Mondial - 02-07-2014, 12:42 PM

RE: Model 89 Cathedral - by skyscraper - 02-07-2014, 01:02 PM

RE: Model 89 Cathedral - by Mondial - 02-07-2014, 01:44 PM

RE: Model 89 Cathedral - by skyscraper - 02-07-2014, 02:42 PM

RE: Model 89 Cathedral - by Mondial - 02-07-2014, 05:11 PM

RE: Model 89 Cathedral - by skyscraper - 02-07-2014, 05:18 PM

RE: Model 89 Cathedral - by Mondial - 02-07-2014, 05:35 PM

RE: Model 89 Cathedral - by Steve Davis - 02-07-2014, 07:21 PM

RE: Model 89 Cathedral - by skyscraper - 02-07-2014, 07:49 PM

RE: Model 89 Cathedral - by skyscraper - 02-26-2014, 12:36 PM

RE: Model 89 Cathedral - by Mondial - 02-26-2014, 01:14 PM

RE: Model 89 Cathedral - by skyscraper - 02-26-2014, 01:46 PM

RE: Model 89 Cathedral - by morzh - 02-26-2014, 02:44 PM

RE: Model 89 Cathedral - by Mondial - 02-26-2014, 02:58 PM

RE: Model 89 Cathedral - by morzh - 02-26-2014, 03:14 PM

RE: Model 89 Cathedral - by skyscraper - 02-26-2014, 03:26 PM

RE: Model 89 Cathedral - by Mondial - 02-26-2014, 03:35 PM

RE: Model 89 Cathedral - by skyscraper - 02-26-2014, 03:53 PM

RE: Model 89 Cathedral - by Ron Ramirez - 02-26-2014, 08:21 PM

RE: Model 89 Cathedral - by skyscraper - 02-26-2014, 09:25 PM

RE: Model 89 Cathedral - by morzh - 02-26-2014, 10:41 PM

RE: Model 89 Cathedral - by skyscraper - 02-27-2014, 02:58 PM

RE: Model 89 Cathedral - by Mondial - 02-27-2014, 04:33 PM

RE: Model 89 Cathedral - by skyscraper - 03-02-2014, 03:32 PM

RE: Model 89 Cathedral - by Warren - 03-02-2014, 08:34 PM

RE: Model 89 Cathedral - by Mondial - 03-02-2014, 08:40 PM

RE: Model 89 Cathedral - by morzh - 03-02-2014, 08:44 PM

RE: Model 89 Cathedral - by skyscraper - 03-02-2014, 10:07 PM

RE: Model 89 Cathedral - by morzh - 03-02-2014, 10:31 PM

RE: Model 89 Cathedral - by Mondial - 03-03-2014, 12:01 AM

RE: Model 89 Cathedral - by NostalgiaRadioTime - 03-03-2014, 12:12 AM

RE: Model 89 Cathedral - by Warren - 03-03-2014, 12:12 AM

RE: Model 89 Cathedral - by skyscraper - 03-03-2014, 12:47 AM

RE: Model 89 Cathedral - by NostalgiaRadioTime - 03-03-2014, 12:51 AM

RE: Model 89 Cathedral - by skyscraper - 03-03-2014, 12:57 AM

RE: Model 89 Cathedral - by Mondial - 03-03-2014, 10:44 AM

RE: Model 89 Cathedral - by Ron Ramirez - 03-03-2014, 09:12 PM

RE: Model 89 Cathedral - by skyscraper - 03-03-2014, 09:46 PM

RE: Model 89 Cathedral - by NostalgiaRadioTime - 03-03-2014, 11:48 PM

RE: Model 89 Cathedral - by skyscraper - 03-03-2014, 11:55 PM

RE: Model 89 Cathedral - by NostalgiaRadioTime - 03-04-2014, 12:21 AM

RE: Model 89 Cathedral - by NostalgiaRadioTime - 03-04-2014, 09:02 AM

RE: Model 89 Cathedral - by Mondial - 03-04-2014, 09:54 AM

RE: Model 89 Cathedral - by NostalgiaRadioTime - 03-04-2014, 07:06 PM

RE: Model 89 Cathedral - by Mondial - 03-04-2014, 07:15 PM

RE: Model 89 Cathedral - by NostalgiaRadioTime - 03-04-2014, 11:28 PM

RE: Model 89 Cathedral - by Mondial - 03-05-2014, 12:40 AM

RE: Model 89 Cathedral - by NostalgiaRadioTime - 03-05-2014, 12:48 AM

RE: Model 89 Cathedral - by NostalgiaRadioTime - 03-05-2014, 07:18 PM

RE: Model 89 Cathedral - by Mondial - 03-06-2014, 11:51 AM

RE: Model 89 Cathedral - by NostalgiaRadioTime - 03-06-2014, 06:42 PM

RE: Model 89 Cathedral - by skyscraper - 03-08-2014, 09:41 PM

RE: Model 89 Cathedral - by Radioroslyn - 03-08-2014, 10:06 PM

RE: Model 89 Cathedral - by skyscraper - 03-08-2014, 10:16 PM

RE: Model 89 Cathedral - by Radioroslyn - 03-08-2014, 11:19 PM

RE: Model 89 Cathedral - by NostalgiaRadioTime - 03-09-2014, 12:16 AM

RE: Model 89 Cathedral - by Mondial - 03-09-2014, 10:26 AM

RE: Model 89 Cathedral - by Warren - 03-09-2014, 06:11 PM

RE: Model 89 Cathedral - by NostalgiaRadioTime - 03-09-2014, 10:22 PM

RE: Model 89 Cathedral - by Mondial - 03-10-2014, 10:25 AM

RE: Model 89 Cathedral - by skyscraper - 03-10-2014, 11:16 AM

RE: Model 89 Cathedral - by Mondial - 03-10-2014, 12:05 PM

RE: Model 89 Cathedral - by skyscraper - 03-10-2014, 12:39 PM

RE: Model 89 Cathedral - by NostalgiaRadioTime - 03-10-2014, 01:36 PM

RE: Model 89 Cathedral - by skyscraper - 03-10-2014, 03:26 PM

RE: Model 89 Cathedral - by NostalgiaRadioTime - 03-10-2014, 06:12 PM

RE: Model 89 Cathedral - by gregb - 03-10-2014, 06:15 PM

RE: Model 89 Cathedral - by Mondial - 03-10-2014, 08:34 PM

RE: Model 89 Cathedral - by skyscraper - 03-10-2014, 08:45 PM

RE: Model 89 Cathedral - by NostalgiaRadioTime - 03-10-2014, 10:27 PM

RE: Model 89 Cathedral - by skyscraper - 03-10-2014, 10:36 PM

RE: Model 89 Cathedral - by NostalgiaRadioTime - 03-10-2014, 10:48 PM

RE: Model 89 Cathedral - by Mondial - 03-11-2014, 12:05 AM

RE: Model 89 Cathedral - by NostalgiaRadioTime - 03-11-2014, 07:53 AM

RE: Model 89 Cathedral - by NostalgiaRadioTime - 03-11-2014, 10:53 PM

RE: Model 89 Cathedral - by gregb - 03-11-2014, 11:00 PM

RE: Model 89 Cathedral - by Mondial - 03-11-2014, 11:17 PM

RE: Model 89 Cathedral - by NostalgiaRadioTime - 03-11-2014, 11:48 PM

RE: Model 89 Cathedral - by skyscraper - 03-12-2014, 12:22 AM

RE: Model 89 Cathedral - by NostalgiaRadioTime - 03-12-2014, 07:54 AM

RE: Model 89 Cathedral - by Mondial - 03-12-2014, 08:15 AM

RE: Model 89 Cathedral - by skyscraper - 03-12-2014, 09:15 PM

RE: Model 89 Cathedral - by Mondial - 03-12-2014, 10:02 PM

RE: Model 89 Cathedral - by NostalgiaRadioTime - 03-12-2014, 10:29 PM

RE: Model 89 Cathedral - by skyscraper - 03-12-2014, 10:40 PM

RE: Model 89 Cathedral - by Mondial - 03-12-2014, 10:48 PM

RE: Model 89 Cathedral - by NostalgiaRadioTime - 03-12-2014, 10:56 PM

RE: Model 89 Cathedral - by skyscraper - 03-12-2014, 11:03 PM

RE: Model 89 Cathedral - by NostalgiaRadioTime - 03-12-2014, 11:04 PM

RE: Model 89 Cathedral - by skyscraper - 03-12-2014, 11:06 PM

RE: Model 89 Cathedral - by NostalgiaRadioTime - 03-12-2014, 11:08 PM

RE: Model 89 Cathedral - by NostalgiaRadioTime - 03-12-2014, 11:10 PM

RE: Model 89 Cathedral - by skyscraper - 03-12-2014, 11:17 PM

RE: Model 89 Cathedral - by NostalgiaRadioTime - 03-12-2014, 11:22 PM

RE: Model 89 Cathedral - by skyscraper - 03-12-2014, 11:28 PM

RE: Model 89 Cathedral - by NostalgiaRadioTime - 03-12-2014, 11:33 PM

RE: Model 89 Cathedral - by Mondial - 03-12-2014, 11:35 PM

RE: Model 89 Cathedral - by skyscraper - 03-12-2014, 11:57 PM

RE: Model 89 Cathedral - by Ron Ramirez - 03-13-2014, 05:27 AM

RE: Model 89 Cathedral - by skyscraper - 03-13-2014, 01:44 PM

RE: Model 89 Cathedral - by NostalgiaRadioTime - 03-13-2014, 07:37 PM

RE: Model 89 Cathedral - by Mondial - 03-13-2014, 08:14 PM

RE: Model 89 Cathedral - by NostalgiaRadioTime - 03-13-2014, 10:12 PM

RE: Model 89 Cathedral - by skyscraper - 03-14-2014, 12:31 PM

RE: Model 89 Cathedral - by Ron Ramirez - 03-14-2014, 12:40 PM

RE: Model 89 Cathedral - by skyscraper - 03-14-2014, 12:52 PM

RE: Model 89 Cathedral - by gregb - 03-15-2014, 04:45 PM

RE: Model 89 Cathedral - by NostalgiaRadioTime - 03-15-2014, 10:57 PM

RE: Model 89 Cathedral - by Ron Ramirez - 03-15-2014, 11:03 PM

RE: Model 89 Cathedral - by gregb - 03-15-2014, 11:13 PM

RE: Model 89 Cathedral - by Ron Ramirez - 03-15-2014, 11:14 PM

RE: Model 89 Cathedral - by gregb - 03-15-2014, 11:38 PM

RE: Model 89 Cathedral - by Ron Ramirez - 03-16-2014, 09:54 AM

RE: Model 89 Cathedral - by NostalgiaRadioTime - 03-16-2014, 11:29 AM

RE: Model 89 Cathedral - by skyscraper - 03-16-2014, 01:57 PM

RE: Model 89 Cathedral - by gregb - 03-16-2014, 02:15 PM

RE: Model 89 Cathedral - by skyscraper - 03-17-2014, 02:30 PM

RE: Model 89 Cathedral - by skyscraper - 03-24-2014, 04:25 PM

RE: Model 89 Cathedral - by morzh - 03-24-2014, 04:41 PM

RE: Model 89 Cathedral - by gregb - 03-24-2014, 04:53 PM

RE: Model 89 Cathedral - by skyscraper - 03-24-2014, 04:59 PM

RE: Model 89 Cathedral - by gregb - 03-24-2014, 05:07 PM

RE: Model 89 Cathedral - by skyscraper - 03-24-2014, 05:12 PM

RE: Model 89 Cathedral - by gregb - 03-24-2014, 05:14 PM

RE: Model 89 Cathedral - by NostalgiaRadioTime - 03-24-2014, 07:07 PM

RE: Model 89 Cathedral - by gregb - 03-24-2014, 07:19 PM

RE: Model 89 Cathedral - by morzh - 03-24-2014, 07:21 PM

RE: Model 89 Cathedral - by skyscraper - 03-24-2014, 07:26 PM

RE: Model 89 Cathedral - by NostalgiaRadioTime - 03-24-2014, 07:32 PM

RE: Model 89 Cathedral - by skyscraper - 03-24-2014, 07:35 PM

RE: Model 89 Cathedral - by NostalgiaRadioTime - 03-24-2014, 07:42 PM

RE: Model 89 Cathedral - by skyscraper - 03-26-2014, 10:40 AM

RE: Model 89 Cathedral - by NostalgiaRadioTime - 03-26-2014, 08:51 PM

RE: Model 89 Cathedral - by skyscraper - 03-26-2014, 09:49 PM

RE: Model 89 Cathedral - by NostalgiaRadioTime - 03-26-2014, 10:50 PM

RE: Model 89 Cathedral - by skyscraper - 03-26-2014, 11:04 PM

RE: Model 89 Cathedral - by TV MAN - 03-27-2014, 01:26 PM

RE: Model 89 Cathedral - by skyscraper - 03-27-2014, 02:34 PM

RE: Model 89 Cathedral - by BrendaAnnD - 03-27-2014, 03:39 PM

RE: Model 89 Cathedral - by gregb - 03-27-2014, 03:44 PM

RE: Model 89 Cathedral - by PAradiogeek - 03-27-2014, 03:50 PM

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