Philco 511 Restoration and Questions - Printable Version
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RE: Philco 511 Restoration and Questions - Philco281989 - 10-12-2015
Well I made a mistake before I ever completed the RC Couple.
There was no noise coming from the test speaker because I used enameled copper wire to connect it to the speaker post and didn't realize it was acting as an insulator instead of a conductor. The copper wire I used off the test speaker to the two speaker post is enameled dipped, no conductivity on the outside coating. What I fool I am to have just realized this!!!!!!!!!!!!!
As a result because of my mistake, could the 1st AF trans still be good? with that meg ohm reading?? Perhaps I will take away the RC-Couple and try the AF trans again.
I completed the RC Couple on the 1st A.F. Transformer. I double checked my work, everything is on properly. There is sound out of the test speaker. But it is just a cycle hum. No static, stations, or any other noise no matter how I manipulate the controls. I tested the R.F. Coils, all within just a few ohms, good. All the rest of the chokes test good. Could the set be way off on alignment to where it will not pick up any stations?
Jon
RE: Philco 511 Restoration and Questions - Radioroslyn - 10-12-2015
So do you have 90-100vdc on pin 2 of all of your #26 toobs???
Terry
RE: Philco 511 Restoration and Questions - Philco281989 - 10-12-2015
(10-12-2015, 06:21 AM)Radioroslyn Wrote: So do you have 90-100vdc on pin 2 of all of your #26 toobs???
Terry
Yes exactly between 90-100 VDC on all the plates of the 26 tubes. I am going to try and swap a few out, see if that does anything.
Jon
RE: Philco 511 Restoration and Questions - Radioroslyn - 10-12-2015
So what do you have on pin2 of the 27 tube and if you touch pin3 the set should give out with loud buzz. Check#20 for open should be about 2megs. After this you'll need to break out the signal generator.
Terry
RE: Philco 511 Restoration and Questions - Philco281989 - 10-13-2015
Just out of curiosity last night I injected the antenna into the 3rd RF stage grid. I picked up faint stations for the first time!
I injected the antenna into the 2nd RF stage grid. I picked up faint stations for the second time!
I injected the antenna into the 1st RF stage grid. NO STATIONS WERE PICKED UP.
So I was able to isolate the problem to the first stage. The antenna tuner coil tested good. I retraced my wiring around this location. ENDS UP, I HAD ONE SIDE OF A BYPASS CAP CONNECTED TO THE ANTENNA TUNER COIL, WHEN IT WAS SUPPOSE TO BE CONNECTED TO GROUND.
I disconnected and temporarily jumpered that side of the cap to ground and the set is now working just normal! What a fool I am, but I guess that is what trouble shooting is all about.
NOW, HOW TO ALIGHN THE SET? I think this set is a Neutrodyne.
Jon
RE: Philco 511 Restoration and Questions - Ron Ramirez - 10-13-2015
(10-13-2015, 02:44 PM)Philco281989 Wrote: NOW, HOW TO ALIGHN THE SET?
The procedure may be found here:
http://www.philcoradio.com/phorum/showthread.php?tid=14988
and, yes, it is a Neutrodyne. Neutrodyne-Plus, to be exact.
RE: Philco 511 Restoration and Questions - Philco281989 - 10-14-2015
Ron, thank you.
Jon
RE: Philco 511 Restoration and Questions - Philco281989 - 10-20-2015
Hello All,
Wanted to give a final update. The radio was just about right on with alignment. I decided not to neutralize the set as it has been playing great for over 10 hours within a couple of days. No oscillation, howling, or anything.
For a 1928 set, she sounds pretty good. I retraced the wiring one last time and made sure all tubes were in their correct sockets. The Heathkit T-2 is the test speaker I had on hand with a universal output transformer. It worked great. The owner has the proper speaker or has a different one to use with the set.
Thank you all for the help you provided on this restoration. It's complete!
Jon
RE: Philco 511 Restoration and Questions - philco phan - 07-13-2017
Nice work on this 511,it will help when I get to the 514 I just bought.
Phil
RE: Philco 511 Restoration and Questions - Jimmy Radionut - 07-14-2017
Did you restuff the cap block ??