Welcome Guest! Be sure you know and follow the Phorum Rules before posting. Thank you and Enjoy! (January 12) x

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

Philco 38-3 Not Working
#1

Dear Friends
I have had this radio for around 5 years and have not hear it yet working. Five people have worked on it with no success. The last one was closed to get it working but, he got sick and was not able to continue working with electronic apparatuses for safety reasons
The last status he gave me was:
"The last known condition I witnessed on the bench, I could inject an audio signal at the volume control and had great audio through the last pre-amp and push pull amplifier circuit.
The original speaker sounded very good. I was able to inject RF signals at the front end(antenna connection) as could trace it up to and basically through the the oscillator circuit but the signal was not being coupled to the audio circuit
I suspect that the oscillator tube or something else in the oscillator circuit has now failed and will not allow proper signal get through"
This guy worked with
The caps
The bad resistors
Potted Bakelite components that house capacitors
A bad tube socket
Bad wiring
And replace all of the tubes

Now my radio is in the hands of another technician.

Question

What should I ask this Guy to check on? Which is the oscillator tube?

Do you think as I do that it should be very close to have this radio working?

Im attaching a pic of the cabinnet

Thanks for all your help


Attached Files Image(s)
   
#2

<What should I ask this Guy to check on?
If he's worth his weight in salt he should be able to troubleshoot it without any advise on what someone else thinks may or may not be the issues.

<Which is the oscillator tube?
The 6A8G. There is a 6N7 that influences the oscillator via the afc circuit.

<Do you think as I do that it should be very close to have this radio working?
Lots of variables involved. Might be proprietary parts that aren't commonly available. Depends on how sharp and motivated your tech is. Could have an open coil or two in the rf deck (not all that common on the post '35 set).

GL

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

Thanks a lot




Users browsing this thread:
[-]
Recent Posts
Electrolytic restuffing/internals
Thanks. I think I try to cut this as suggested. I don’t have a lathe, but I do have a tap and die set. I am going to see...bridkarl — 04:46 PM
Another amp build - here I go again!
Hey all! Well, I guess that with what I learned from my last build, it's time to move up the ladder another rung and tak...TV MAN — 04:38 PM
Electrolytic restuffing/internals
There are various ways to handle this, one is to cut near just above that rolled in area is near the bottom, using the r...Arran — 04:36 PM
philco predicta
If you have a television signal generator (a must-have for TV repair) and an oscilloscope (the same), then this problem ...RadioSvit — 04:23 PM
HiFi (Chifi) tube amp build - but my own design.
Thanks Rod for the offer but I don't think those would work. There's some differences in the sizing and mounting holes b...TV MAN — 03:13 PM
philco predicta
Bob Anderson (Bandersontv) on Youtube would be the go-to guy on these. Lots of good videos. I don't know what model you ...TV MAN — 03:02 PM
Electrolytic restuffing/internals
I have an issue on a non-Philco radio which I expect to run into on a whole set of Philcos and others. I have an 8mf ...bridkarl — 01:17 PM
Philco model 38 code 121 not receiving signal.
Thank you sir. I thought about it and decided to put it up in the arch support. I was looking at the chassis and didn't ...Stormlord5500 — 06:24 AM
Philco model 38 code 121 not receiving signal.
Congrats on your success Stormlord. My rough guess is that since both the 15 and the 1A6 are supposed to be shielded, I...MrFixr55 — 10:04 PM
The list of my radio & TV collection!
A little light Saturday positive about our hobby in our feed... My new every Saturday video about antique radio equipme...RadioSvit — 02:12 PM

[-]
Who's Online
There are currently 743 online users. [Complete List]
» 2 Member(s) | 741 Guest(s)
AvatarAvatar

>