Can you identify Philco chassis and/or speaker?
Posts: 120
Threads: 10
Joined: Jul 2011
City: Glendale, CA
Hi, Everybody,
I'm looking for some help in identifying this Philco radio and it's speaker. Here is a link with some pictures from Ebay.
http://www.ebay.com/itm/Parts-chassis-an...7675.l2557
From the tube shield holders I spotted in the pictures, I'm guessing this chassis is from 1938 or newer. I was able to count 5 tube sockets for sure, maybe six. This speaker has 4 wires going to the chassis. The Philco part number on the electromagnet coil is: 32-9142-W. I can't spot any other numbers on this speaker or output transformer.
Can anyone out there in Philco land identify this chassis and/or speaker? I've got this speaker and want to make sure I use the output transformer attached to the speaker with the correct single output tube.
Thanks a lot, Tom
(This post was last modified: 10-28-2012, 01:36 PM by Tom Hamilton.)
Posts: 13,776
Threads: 580
Joined: Sep 2005
City: Ferdinand
State, Province, Country: Indiana
That is a chassis and speaker from a Philco 642 - a 1936 model designed to operate on 32 volts DC.
If you're thinking of trying to use its speaker in an AC set, forget it - the field has a DC resistance of 115 ohms, roughly 1/10 of the resistance needed in the majority of Philco sets.
The speaker is a K-29, by the way - it has a push-pull output transformer, but its primary impedance is 4000 ohms - right for the 48 tubes used in the 642, but wrong for 42 or 6F6 push-pull outputs which want to see around 5900 ohms.
--
Ron Ramirez
Ferdinand IN
Posts: 120
Threads: 10
Joined: Jul 2011
City: Glendale, CA
Thank you Ron.
The speaker didn't cost me a lot, but I was hopeful it could be used in AC radios. The seller on Ebay seemed to be very knowledgeable about old radios. He restored them. I wondered, to myself, why he would even sell an 8 inch speaker.
On the plus side, I was able to practice my paper cone repair skills. Now, the paper cone looks pretty good.
Live and learn. Tom
Posts: 2,353
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Joined: May 2010
City: Clayton, NC
The 642 is not a common set. Why not try and find a cabinet for it?
Posts: 4,875
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Joined: Sep 2008
City: Sandwick, BC, CA
I think it would use the same cabinet as a Philco 620, which are much more common. The only issue I see is the rusty chassis, I don't know how severe it is but it would be an interesting set to put back together if possible.
Regards
Arran
(This post was last modified: 10-29-2012, 01:28 AM by Arran.)
Posts: 120
Threads: 10
Joined: Jul 2011
City: Glendale, CA
Hi,
This chassis and speaker was offered as an auction item on Ebay. Someone else wanted some parts off the chassis if no one bid on it. I then asked to buy the 8 inch speaker if there were no bids as well. There were no bids so the seller, Rettop sold me the speaker for $10.00 plus $17.50 shipping. My intention was to use this speaker for an AC powered Philco project, but I just found out from Ron that this speaker is only good for a battery powered radio.
As I'm pretty new to radio repair/restoration and still learning, I had no idea that a battery powered radio speaker was totally incompatible in an AC powered radio. Like I said earlier, live and learn.
If someone wants to contact this Ebay seller to buy the chassis and salvage this radio please contact me and I will put you in touch with him. I believe this chassis (and speaker) came from an estate sale.
Tom
Posts: 2,128
Threads: 18
Joined: Oct 2008
City: Merrick, Long Island, NY
Got to be a way to power up the speaker, whether it is worthwhile or not is another matter.
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