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Messed up Philco 90
Bob Andersen
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Posts: 797
Threads: 42
Joined: Dec 2008
City: Chicago, IL
#8

06-06-2013, 08:20 PM
The thing is I'm not sure whoever modified it did know what they were doing. The original 6 mfd x2 plus filter choke has been replaced with a 40 mfd and 20 mfd x2. That's a lot of stress for an 80 rectifier tube. I'm not sure how they dealt with the two missing metal box caps that housed 5 caps in total.

Here's an unmodified 90 chassis showing the box caps, choke and bias power resistor.

[Image: http://mcclellans.com/images/Philco90/ChassisAfter.jpg]
(This post was last modified: 06-06-2013, 08:26 PM by Bob Andersen.)
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Messages In This Thread
Messed up Philco 90 - by Bob Andersen - 06-06-2013, 04:17 PM
RE: Messed up Philco 90 - by Bob Andersen - 06-06-2013, 04:26 PM
RE: Messed up Philco 90 - by Art Hoch - 06-06-2013, 05:29 PM
RE: Messed up Philco 90 - by Mondial - 06-06-2013, 06:25 PM
RE: Messed up Philco 90 - by morzh - 06-06-2013, 06:57 PM
RE: Messed up Philco 90 - by Bill Kinghorn - 06-06-2013, 07:02 PM
RE: Messed up Philco 90 - by Bill Kinghorn - 06-06-2013, 07:05 PM
RE: Messed up Philco 90 - by Bob Andersen - 06-06-2013, 08:20 PM
RE: Messed up Philco 90 - by Mondial - 06-06-2013, 08:48 PM
RE: Messed up Philco 90 - by GarySP - 06-06-2013, 09:14 PM
RE: Messed up Philco 90 - by Bill Kinghorn - 06-06-2013, 11:30 PM
RE: Messed up Philco 90 - by morzh - 06-06-2013, 11:34 PM
RE: Messed up Philco 90 - by Bob Andersen - 06-07-2013, 12:01 AM
RE: Messed up Philco 90 - by morzh - 06-07-2013, 12:27 AM
RE: Messed up Philco 90 - by Bob Andersen - 06-07-2013, 12:39 AM
RE: Messed up Philco 90 - by Arran - 06-07-2013, 03:22 AM
RE: Messed up Philco 90 - by Philco281989 - 06-09-2013, 12:07 PM
RE: Messed up Philco 90 - by Bob Andersen - 06-09-2013, 02:02 PM
RE: Messed up Philco 90 - by wa2ise - 06-11-2013, 09:45 PM
RE: Messed up Philco 90 - by Bob Andersen - 06-23-2013, 04:05 PM
RE: Messed up Philco 90 - by morzh - 06-23-2013, 07:29 PM
RE: Messed up Philco 90 - by Bob Andersen - 06-23-2013, 09:35 PM
RE: Messed up Philco 90 - by Arran - 06-23-2013, 09:44 PM
RE: Messed up Philco 90 - by Bob Andersen - 06-23-2013, 10:22 PM
RE: Messed up Philco 90 - by Arran - 06-24-2013, 12:08 AM
RE: Messed up Philco 90 - by wa2ise - 06-25-2013, 09:20 PM
RE: Messed up Philco 90 - by Arran - 06-25-2013, 09:35 PM
RE: Messed up Philco 90 - by morzh - 06-25-2013, 10:39 PM
RE: Messed up Philco 90 - by AI2V - 06-27-2013, 10:05 AM
RE: Messed up Philco 90 - by Bob Andersen - 06-27-2013, 11:27 AM
RE: Messed up Philco 90 - by Electrothaumaturgist - 06-27-2013, 11:29 AM
RE: Messed up Philco 90 - by Ron Ramirez - 06-27-2013, 04:42 PM
RE: Messed up Philco 90 - by Arran - 06-28-2013, 01:55 AM
RE: Messed up Philco 90 - by Eliot Ness - 06-28-2013, 08:25 AM
RE: Messed up Philco 90 - by marty - 06-28-2013, 09:29 AM
RE: Messed up Philco 90 - by Bob Andersen - 06-28-2013, 12:33 PM
RE: Messed up Philco 90 - by morzh - 07-05-2013, 10:10 PM



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