Posts: 1,411
Threads: 71
Joined: Oct 2007
City: Linn Creek, MO
Now the speaker. The correct speaker for the late version 90 is nearly impossible to find. The push-pull 47 pentodes need a much higher impedance speaker than the 45 triodes used in the early version 90. I had planned to make do with an early version speaker but as it turned out, the one I had, has a bad output transformer. The cone is bad also and I had planned to replace it. So, up to now, I have been using the speaker out of my Philco 20 for testing the chassis.
[Image: https://live.staticflickr.com/65535/4924...5f12_k.jpg] 100_0200 by Steve Davis, on Flickr
I removed the transformer, the cone and the field assembly. I then cleaned and painted the "pie pan".
[Image: https://live.staticflickr.com/65535/4924...69a6_k.jpg] 100_0202 by Steve Davis, on Flickr
Steve
M R Radios C M Tubes
Messages In This Thread
RE: Philco 90 Restoration - by Steve Davis - 12-19-2019, 05:01 PM
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Recent Posts
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Part numbers to model cross
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| Thank you morzh, that is exactly what I was looking for. Now , is there some where that shows pinouts for Philco power ...Jim Dutridge — 11:37 AM |
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Restoration of the Canadian General Electric A-87
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| Thanks for your help Michael. In fact, this video is only an intermediate result. Later I had to apply another tinting l...RadioSvit — 09:01 AM |
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Restoration of the Canadian General Electric A-87
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| Great job on the cabinet.
PS. In the US notation, "kenotron" refers to specific type of tubes; we call re...morzh — 08:24 AM |
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Part numbers to model cross
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This document has at least some tables of models and parts used.
Example: Choke 32-7572, used in 604 radio.
Search f...morzh — 08:19 AM |
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Restoration of the Canadian General Electric A-87
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| I also checked all the radio tubes on my Hickok 530 tube tester. The 5Z3 kenotron turned out to be faulty, all the other...RadioSvit — 08:02 AM |
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Restoration of the Canadian General Electric A-87
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Well... While the varnish is drying up, I started repairing the chassis...
Of course I started by replacing the pa...RadioSvit — 07:12 AM |
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Philco Model 38-7: what caps & resistors do fail typically?
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| Hello Martin,
Welcome aboard our little community what great Model 38-7
Sincerely Richardradiorich — 12:30 AM |
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Philco Model 38-7: what caps & resistors do fail typically?
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| Welcome to the Phorum Martin.
I count about 9 paper caps, the 3 electrolytic caps and 2-Y2 safety caps to replace th...RodB — 09:44 PM |
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Part numbers to model cross
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| Jim,
We have this index put together by Dale Cook but I don't think that is quite what you are looking for.
The Parts...klondike98 — 09:37 PM |
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Philco Model 38-7: what caps & resistors do fail typically?
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| Yep the dim bulb test is OK but I'd definitely replace all those electrolytics before I did it. Since those #47 conden...klondike98 — 09:18 PM |
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