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Hello all, luckily I printed the part number breakdown for the Bakelite blocks from the Philcorepairbench website a few years ago. I don't see that info on their website there anymore?? Anyway, I can't find info on several Philco part numbers from my model 18 I am doing. Specifically, the voltage ratings for:
3615AM, 4989AC, 3615AA, 8035K, 3903Z, 4989N, 3793AB, and 3793R.
Further, do I really need a 600V rating on: 3903P, 6287N (.09, .15uF), and 3615G (.05uF)
Any other resources out there for these Bakelite block part numbers? Thanks so much, Jeff
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Wayback Machine to the rescue!
https://web.archive.org/web/201603242327...lokcap.htm
I would use 600 or 630V caps to replace every paper capacitor if it were my radio.
--
Ron Ramirez
Ferdinand IN
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(01-04-2018, 01:20 PM)Ron Ramirez Wrote: I would use 600 or 630V caps to replace every paper capacitor if it were my radio. As a reminder, that includes the .00011 uf capacitors, which are paper. They are replaced with 110 pf mica capacitors.
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Hello, thanks for the replies. The link Ron shared is great but doesn't list all part numbers and codes. The ones I questioned aren't listed; for example, 3615-AA. Is there any way to find out for sure what these part numbers are? Thanks.
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Yes - buy the book by Ray Bintliff, if you can find a copy. Ray was selling his remaining copies here on the Phorum (through a Phorum member) a few months back but I believe they are all gone now.
I did notice that the Antique Radio Classified site is still advertising Ray's book on this subject. I do not know if they did a reprint, if it is still available, or what.
--
Ron Ramirez
Ferdinand IN
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Yes, Ray's book is getting hard to find. If you still need it...
[Image: https://www.dropbox.com/s/ez9ognly6tuxer....jpg?raw=1]
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Hello, I found what I needed here on this wonderful site. Under: Philco restoration notebook, there is a link to the Philco Tech section, a thread labeled "Philco Bakelite block condenser data, then Ron put a link to a PDF file which is an original publication from Philco dated 1937 which lists all old obsolete Bakelite part numbers (all of mine in question are there  ) and a suitable replacement part number. Thanks a lot!!
http://philcoradio.com/phorum/attachment.php?aid=10650 here is the link to the pdf
(This post was last modified: 01-10-2018, 10:33 AM by jeffb.
Edit Reason: forgot to add link
)
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Make sure the bakelite block you're working on matches the documentation in that link. For example, I recently found more than one block wired differently from the document for the same block number. Instead of the single capacitor tied to the farthest points as shown in klondike's sketch above, they were wired to adjacent points. Take a peek at the wires coming out of the cavity to the tabs before you proceed, and match them accordingly.
(This post was last modified: 01-10-2018, 10:46 AM by Kestas.)
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