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Philco 37-690 Restoration
#9

They probably could have gotten away with just the RF and IF tubes in shields. Or with no tubes in shields if they were willing to put up with RF interference and or images and noise. These issues are usually not severe enough to limit broadcast band listening (but can be). But, if they wanted to pull SW out of the weeds, it was a good idea.

If you really want to prove this, try to do an alignment without the shields or just run the radio without the shields.

OH, the osc. tube really needs the shield too.

Better radios usually have better shielding.

"I just might turn into smoke, but I feel fine"
http://www.russoldradios.com/


Messages In This Thread
Philco 37-690 Restoration - by Kenradio - 05-11-2018, 05:33 AM
RE: Philco 37-690 Restoration - by Ron Ramirez - 05-11-2018, 07:47 PM
RE: Philco 37-690 Restoration - by Kenradio - 05-12-2018, 05:48 AM
RE: Philco 37-690 Restoration - by morzh - 05-12-2018, 10:10 PM
RE: Philco 37-690 Restoration - by Kenradio - 05-13-2018, 04:51 AM
RE: Philco 37-690 Restoration - by Ron Ramirez - 05-13-2018, 07:38 AM
RE: Philco 37-690 Restoration - by Kenradio - 05-13-2018, 09:03 AM
RE: Philco 37-690 Restoration - by GarySP - 05-13-2018, 09:44 AM
RE: Philco 37-690 Restoration - by Phlogiston - 05-13-2018, 10:21 AM
RE: Philco 37-690 Restoration - by Kenradio - 05-13-2018, 04:30 PM
RE: Philco 37-690 Restoration - by Ron Ramirez - 05-13-2018, 07:42 PM
RE: Philco 37-690 Restoration - by Ron Ramirez - 05-13-2018, 07:44 PM
RE: Philco 37-690 Restoration - by Kenradio - 05-15-2018, 06:26 AM
RE: Philco 37-690 Restoration - by Kenradio - 05-15-2018, 06:36 AM
RE: Philco 37-690 Restoration - by morzh - 05-15-2018, 08:14 AM
RE: Philco 37-690 Restoration - by Ron Ramirez - 05-15-2018, 09:05 AM
RE: Philco 37-690 Restoration - by Kenradio - 05-15-2018, 11:22 AM
RE: Philco 37-690 Restoration - by tbone - 05-19-2018, 08:19 AM
RE: Philco 37-690 Restoration - by Phlogiston - 05-19-2018, 09:39 AM
RE: Philco 37-690 Restoration - by Ron Ramirez - 05-19-2018, 02:54 PM
RE: Philco 37-690 Restoration - by Kenradio - 05-19-2018, 06:02 PM
RE: Philco 37-690 Restoration - by tbone - 05-20-2018, 08:15 PM
RE: Philco 37-690 Restoration - by Kenradio - 05-21-2018, 04:37 AM
RE: Philco 37-690 Restoration - by Kenradio - 05-26-2018, 06:19 AM
RE: Philco 37-690 Restoration - by WyTex - 05-26-2018, 08:01 AM
RE: Philco 37-690 Restoration - by morzh - 05-26-2018, 10:40 AM
RE: Philco 37-690 Restoration - by Kenradio - 05-26-2018, 12:29 PM
RE: Philco 37-690 Restoration - by KCMike - 05-26-2018, 12:32 PM
RE: Philco 37-690 Restoration - by morzh - 05-26-2018, 01:44 PM
RE: Philco 37-690 Restoration - by Kenradio - 05-26-2018, 02:40 PM
RE: Philco 37-690 Restoration - by morzh - 05-26-2018, 02:58 PM
RE: Philco 37-690 Restoration - by Kenradio - 05-26-2018, 03:16 PM
RE: Philco 37-690 Restoration - by tbone - 06-09-2018, 06:38 AM
RE: Philco 37-690 Restoration - by Kenradio - 06-09-2018, 06:50 PM



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