Philco 620B alignment woes

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Philco 620B alignment woes

wonderwrench
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Posts: 96
Threads: 16
Joined: Oct 2007

06-21-2008, 11:52 AM

More alignment woes. As I suspected who ever worked on this radio had no clue. The alignment was so far off it was a nightmare to perform. Once completed the radio performs much better, not great but good. I did uncover two problems.

First the RF trimmers act strange. It is not possible to peak any one of the three trimmers during the alignment. From tight as I loosen up the trimmer I get a rise at about 1 half turn but never a peak. I ended up leaving all three RF trimmers on the tight side of the excessively wide peak. Possible cause a bad cap in the RF circuit? Your opinions please.

Secondly the radio's AVC curcuit seems to work poorly or not at all. Could be related to the first problem? Your opinions please.

Thanks

Bill

It's not what you don't know that hurts you it's what you know that's not so.

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Messages In This Thread

Philco 620B alignment woes - by wonderwrench - 06-19-2008, 06:29 PM

[No subject] - by wonderwrench - 06-20-2008, 07:02 PM

[No subject] - by BDM - 06-20-2008, 07:19 PM

[No subject] - by wonderwrench - 06-20-2008, 07:46 PM

[No subject] - by BDM - 06-20-2008, 07:58 PM

[No subject] - by wonderwrench - 06-20-2008, 08:03 PM

[No subject] - by wonderwrench - 06-21-2008, 11:52 AM

[No subject] - by BDM - 06-21-2008, 12:24 PM

[No subject] - by wonderwrench - 06-21-2008, 12:51 PM

[No subject] - by BDM - 06-21-2008, 01:16 PM

[No subject] - by rghines1 - 06-21-2008, 01:33 PM

[No subject] - by BDM - 06-21-2008, 11:56 PM

[No subject] - by wonderwrench - 06-23-2008, 03:26 PM

[No subject] - by wonderwrench - 06-23-2008, 04:03 PM

[No subject] - by etech - 06-23-2008, 06:33 PM

[No subject] - by wonderwrench - 06-29-2008, 06:23 PM

[No subject] - by wonderwrench - 07-06-2008, 12:26 PM

[No subject] - by Ron Ramirez - 07-06-2008, 02:46 PM

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