Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5

Having a look at the Philco 76
#1

I picked this thing up on ebay last week. Did some cursory measurements and let her rip. Had a bad 24A tube. Replaced it and it played very well. The power transformer has been replaced along time ago. It had been leaking abit of wax so I thought it would be a good idea to recap it. Had the bank out and rebuilt in an hour or so. Onward to a half dozen other cap under the chassis.
Terry
#2

Which version did you get (table, console, lowboy)?
#3

Terry, love to watch your progress. Pictures are nice.
Jerry

A friend in need is a pest!  Bill Slee ca 1970.
#4

Hi Jon and Jerry
I didn't take any pics but it really wasn't that exciting. Found a bad resistor, had drifted to double it original value. It was the det. plate load resistor was about a meg. Replaced the under the chassis caps one gave me a run for my money. Bottom line one of the terminals was used as a tie point not a connection to the actual cap. The way it was wired it didn't make any sense.Drove me nutz for a half hour or so trying to figure out what the heck that cap was in there doing! Found a parts pic location that listed it and then everything came together. Here's a pic of it from epay http://www.ebay.com/itm/Philco-Receiver-...462491bd01
So now it's all back together and working well but does have a little distortion in the audio. Need to check the tubes and in a hurry I replaced the det tube (24A) w/a 35 which may be the issue.
Tnx for your interest!
Terry
#5

Beautiful Radio! You really like those pre-superhet sets don't you?

Good luck fixing the distortion issue.
#6

All the radios I had with the plate detector have some distortion I can hear. Tolerable but noticeable when playing music.
In your case cap #15 will cure it if reduced to a few hundred pF but of course the sensitivity will suffer.
#7

Terry, make sure you replace the 35 you have as the detector with the correct 24A.

The plate detector needs a sharp cutoff tube to work properly. A 35 tube has a gradual (remote) cutoff which will produce a lot of 2nd harmonic distortion and low output, even though it may work to some extent.

If you don't have an extra 24A, switch the 35 with one of the 24A RF amps which should work fine with the 35 substitution.
#8

Tnx guys for the tips. Will get back to it soon.
Terry




Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
trying to identify this wire type
Thanks to all for the feedback. As Arran said, it is probably an older replacement and yes it has a grid cap so I will ...georgetownjohn — 09:32 PM
trying to identify this wire type
It's possible that the red wire, actually a grid cap lead, is a very old replacement, I can't remember seeing a pre 1939...Arran — 09:18 PM
Gilfillan Brothers Car Radio?
Hi everyone,  Special thanks to Joe Rossi for tracking down this obscure radio and thanks to others who took up the hun...Antipodal — 08:15 PM
trying to identify this wire type
Here's one source for your wire of many. Take care and BE HEALTHY! Gary P.S. Can't get the right color you need? I ...GarySP — 06:40 PM
trying to identify this wire type
...and modern wire of the appropriate gauges and insulation V-rating (300V minimum, usually shown right on the wire) is ...morzh — 05:47 PM
1930s Stromberg-Carlson Tombstone Radio need help identifying model number
I have a question about this radio, is there anyone that has access to this radio that has an intact unmolested speaker ...captainclock1988 — 04:28 PM
1930s Stromberg-Carlson Tombstone Radio need help identifying model number
Well what makes me confuse all of those companies is that all three of those companies (Setchell-Carlson, Stromberg-Carl...captainclock1988 — 04:21 PM
trying to identify this wire type
The red wire is rubber covered wire. The others are cotton braid over rubber often in colors or a tracer, also strand...Chas — 02:43 PM
trying to identify this wire type
Greetings Phorum members, Hope you can help me identify this type of wire in the photo I have attached.  I am not sure ...georgetownjohn — 01:53 PM
Philco 60 Squealing
All correct shields must be in place, all tubes correct no subs of any kind. Check any soldered, riveted ground conne...Chas — 01:24 PM

[-]
Who's Online
There are currently no members online.

>