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 Post subject: Philco Model 60 Code 121 Questions
PostPosted: Mar Mon 23, 2020 6:07 pm 
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Joined: Mar Fri 06, 2020 3:48 am
Posts: 16
Location: Maine
Hello, so I am working on doing an electrical restoration on my Philco Model 60, and it appears to be a 1935 model. I have a couple questions:

1. How do I read the style of domino Micamold capacitors? I just don't get it.

2. I noticed that one of the coils fell out of the IF can! The one with the wire coming out of it, a little black wire coil fell out. The radio currently works, but the AM is very patchy depending on how the coil is positioned. Also, the enamel is totally coming off. I could reseal it with some clear lacquer and put the coil back... What should I do? I currently have that IF transformer desoldered and removed.

3. What is the original voltages for the 8mfd filters? The schematic doesn't say...

Thanks!

I won't need to ask anything about the physical restoration, as my Dad was a cabinetmaker most of his life and he will refinish it, so that's nice.


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 Post subject: Re: Philco Model 60 Code 121 Questions
PostPosted: Mar Mon 23, 2020 6:29 pm 
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Joined: Jan Tue 31, 2012 1:55 am
Posts: 12631
Location: Mountains of Mourne. Ireland.
Philco part number 7558 is 8µF rated at 400V

Schematic and parts...
https://philcoradio.com/library/downloa ... l.%201.pdf

Evolution of Philco Model 60
https://philcoradio.com/library/index.p ... -model-60/

from here: https://philcoradio.com/library/

------------

Philco components, their part numbers and values,
+1936 parts catalog...
viewtopic.php?p=2960860#p2960860


Greg.


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 Post subject: Re: Philco Model 60 Code 121 Questions
PostPosted: Mar Mon 23, 2020 6:33 pm 
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Joined: Mar Fri 06, 2020 3:48 am
Posts: 16
Location: Maine
Thanks for confirming that putting in a 400 volt capacitor is fine! I did find the model 60 evolution page before, which has been helpful!


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 Post subject: Re: Philco Model 60 Code 121 Questions
PostPosted: Mar Tue 24, 2020 5:26 pm 
New Member

Joined: Mar Fri 06, 2020 3:48 am
Posts: 16
Location: Maine
I determined the coil that fell out is part of the antenna coil, and is bypassed when the radio is put into police mode. How can I repair/rewind this coil? Does it need to be wound in the same fashion? It's the coil with the 10k resistor across it in the schematic, between the antenna and the .7 ohm coil and ground.

Thanks!


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 Post subject: Re: Philco Model 60 Code 121 Questions
PostPosted: Mar Tue 24, 2020 7:39 pm 
New Member

Joined: Mar Fri 06, 2020 3:48 am
Posts: 16
Location: Maine
Here is a photo of the coil... You can see all of the lacquer damage. How would I go about rewinding this coil?


Attachments:
File comment: Image of Coil
DSC_0052.jpeg
DSC_0052.jpeg [ 572.59 KiB | Viewed 263 times ]
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 Post subject: Re: Philco Model 60 Code 121 Questions
PostPosted: Mar Sat 28, 2020 2:04 am 
New Member

Joined: Mar Fri 06, 2020 3:48 am
Posts: 16
Location: Maine
Sorry to bump, but do I need to use the same gauge of wire to rewind this? I seem to have read that this part isn't in the tuned circuit, so it just has to be close. I can't even wind that crisscross style of winding I don't think. Is there anything I can do? Or do I have to buy something to fix this?

Thanks!


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 Post subject: Re: Philco Model 60 Code 121 Questions
PostPosted: Mar Sat 28, 2020 2:25 am 
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Joined: Jan Tue 31, 2012 1:55 am
Posts: 12631
Location: Mountains of Mourne. Ireland.
Some informative links here...

philco 60 antenna coil site:antiqueradios.com
https://www.google.com/search?q=philco+ ... radios.com

https://philcoradio.com/phorum/showthread.php?tid=4675

View Single Post 75 - - see thread... Philco 60 restoration
http://www.videokarma.org/showpost.php? ... stcount=75

------------

Greg/I previously wrote: You could measure the Magnet wire (enameled wire) with a pair of digital calipers, and find the nearest AWG (gauge).
Magnet wire can be found inside all types of electric motors, large and small.
Old (electrical) home appliances, windshield wiper motors... et cetera.
+eBay and on-line sellers.

Don't spend more than 20 bucks on a pair of calipers.
https://www.harborfreight.com/6-in-Digi ... 63731.html

Count the number of turns, and re-wind.
Gently scrape the enamel off the ends to solder. Use a sharp X-ACTO knife or a razor blade.

Greg.


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 Post subject: Re: Philco Model 60 Code 121 Questions
PostPosted: Mar Sat 28, 2020 2:40 am 
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Joined: Mar Fri 06, 2020 3:48 am
Posts: 16
Location: Maine
Thanks for the info. The problem is it's that inner coil that goes inside the tube which has fallen out. It isn't actually open, but the enamel is just falling off it like crazy. The outer windings are fine. The inner coil is wrapped around a piece of felt, and goes between two positions of the band selector, and is shorted when in Police mode. It's also wound crossways, which you might be able to see in the picture.

I would guess I would have to find a pen or something to wind around and figure out how to emulate that winding style?

Thanks!


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