37-624 Mail Filter Cap 34 is NON-POLARIZED

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37-624 Mail Filter Cap 34 is NON-POLARIZED

davemc
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Posts: 154
Threads: 58
Joined: Dec 2005
City: Dandridge, TN

#10

03-14-2008, 05:25 PM

I just noticed that the MAIN filter capacitor (metal box) C64, which is a 4+8uf/200 volt unit, IS ALSO NON-POLARIZED! Part number is 30-2160S.

I rebuilt it using normal polarized capacitors.

Again, my theory is that since this radio uses a synchronous vibrator supply, if the 6 volt source is connected backward, the B+ will ALSO be backward, which would mean the filter caps would be subjected to reverse polarity. I suppose since the power leads were just large alligator clips, it would be easy to connect them to the wrong post on the battery.

Perhaps Philco made the change after customers complained.

I wonder how long a polarized cap could stand full B+ at reversed polarity?

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Messages In This Thread

37-624 Mail Filter Cap 34 is NON-POLARIZED - by davemc - 02-25-2008, 06:56 PM

RE: 37-624 Mail Filter Cap 34 is NON-POLARIZED - by harley92 - 01-25-2018, 04:12 PM

RE: 37-624 Mail Filter Cap 34 is NON-POLARIZED - by Arran - 01-26-2018, 12:02 AM

RE: 37-624 Mail Filter Cap 34 is NON-POLARIZED - by harley92 - 02-01-2018, 06:30 PM

RE: 37-624 Mail Filter Cap 34 is NON-POLARIZED - by tbone - 02-03-2018, 04:36 PM

RE: 37-624 Mail Filter Cap 34 is NON-POLARIZED - by harley92 - 02-03-2018, 09:07 PM

[No subject] - by Chuck Schwark - 02-25-2008, 09:28 PM

[No subject] - by davemc - 02-26-2008, 07:13 AM

[No subject] - by Ron Ramirez - 02-26-2008, 07:59 AM

[No subject] - by davemc - 02-26-2008, 08:13 AM

[No subject] - by Steve D - 02-26-2008, 12:38 PM

[No subject] - by davemc - 02-26-2008, 01:06 PM

[No subject] - by davemc - 03-03-2008, 06:07 PM

[No subject] - by Ron Ramirez - 03-03-2008, 11:10 PM

[No subject] - by davemc - 03-14-2008, 05:25 PM

[No subject] - by Ron Ramirez - 03-20-2008, 10:58 PM

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