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

39-7 Antenna Help
#1

Hello,
I am new to radio restoration. I picked up a beautiful 39-7 recently. This set has 6 preset channels. I have replaced all of the caps and the tubes are good. This set does not have an antenna loop. It has two wires for an external antenna. I have bought a very long wire and hooked it up to one of the leads but I don't get any reception whatsoever. I just hear static throughout the dial I live in a major metro area and here are many strong AM signals. What am I doing wrong? All radios I have restored so far have had antenna loops so I have never had a reception problem.
I have been playing with tuning the antenna coil and 6 button capacitors for days and I get nothing. Can someone help me?
#2

Hi and welcome to the Phorum,
On the 39-7 it has two wires coming out of the rear edge of the chassis one being the ant connection and the other being the gnd connection. There is no loop antenna. Requires an external antenna.  It also has a row of pushbutton for presetting stations. I had one of these sets back in the 80's in a chairside cabinet. Think the pushbutton all the way to the right engages the manual tuning, if any of the others are depressed it's set to receive on that preset frequency.

So things to check, end pushbutton is engaged, pushbutton contacts are nice and clean, check for rotted rubber wire that maybe shorting and that you have a piece of wire hooked up for the ant.

Do you have a signal generator??

My recollection of the set is it was a good player with good sensitivity. Wish I still had mine. http://www.philcoradio.com/gallery/1939a.htm#f
Here is the service info for it:   http://www.nostalgiaair.org/pagesbymodel...013301.pdf

When my pals were reading comic books
I was down in the basement in my dad's
workshop. Perusing his Sam's Photofoacts
Vol 1-50 admiring the old set and trying to
figure out what all those squiggly meant.
Circa 1966
Now I think I've got!

Terry
#3

Hi Terry thanks for your reply. When the pushbutton for manual is engaged it seems to be worse, meaning that I don't even hear static. If all push buttons are out at least I can get fairly loud static.I have played with each push button cap (there are capacitors with screws and little pieces of mica in between), all intact. I have a 1938 Grunow sitting right next to it, also with just a couple of external wires for an antenna (no loop) and that gets stations just fine with my external antenna wire. I wish I had a signal generator. Yes there are many rotted rubber wires. I don't think there are any shorts I've gone over this set carefully, but I could be wrong.
#4

I cleaned the contacts for the pushbuttons by spraying some WD40 and the set works loud and clear!! Thank you so much!
#5

EEEEEECK!!!!!
You may want to reclean your pb assembly with contact clean rather than wd-40. WD-40 leaves an oily film that may not be so good for the phanalic sp parts. Never use it any part that has HV on it. Have set blaze a few band switches over the years. It's pretty spectacular but a real pita to fix!!
If you are a type A personality you'll be removing the power transformer and replacing the rubber coated wire on it and with quick spray of black paint on the shells.. If you are you are like just put a 300ma fuse in the line cord and call it done.

Glad to hear it's up and running!

ps Is the Big Broadcast still on down there on 88.5FM Sat and Sun nights?

When my pals were reading comic books
I was down in the basement in my dad's
workshop. Perusing his Sam's Photofoacts
Vol 1-50 admiring the old set and trying to
figure out what all those squiggly meant.
Circa 1966
Now I think I've got!

Terry
#6

Hmmm ok I see what you are saying. I will try to get the WD40 out of there and pick up some contact cleaner. I'm not familiar with that radio program. I'll look for it tonight.




Users browsing this thread: 2 Guest(s)
[-]
Recent Posts
Philco 60 Squealing
I have taken out the 2nd IF and found a problem or not. I believe the coils are litz wire. There is a very small strand ...dconant — 02:13 PM
1930s Stromberg-Carlson Tombstone Radio need help identifying model number
Hi Cap'n Clock, Unfortunately, I do not have this radio.  This is a shame because this should be a good performer.  2A5...MrFixr55 — 06:48 AM
American Bosch Model 802 auto radio
I think it would come under either American Bosch or United American Bosch. American Bosch made sets for the American We...Arran — 05:53 AM
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

[-]
Who's Online
There are currently 7634 online users. [Complete List]
» 2 Member(s) | 7632 Guest(s)
AvatarAvatar

>