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Philco PT-69 Question
Eric
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#1

10-03-2015, 10:59 AM
Hello all
Just recapped this and now have to trouble shoot here is the link http://www.nostalgiaair.org/pagesbymodel...014170.pdf

 Is there any print that shows what socket voltages are?

Eric
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Radioroslyn
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#2

10-03-2015, 05:56 PM
Doesn't look like it. But since your a nice guy I'll give you the Terry's voltage chart:
35Z3 Pin 7 +100dc
35A5 pin 2&3 +90vdc  Pin 5 -8vdc.
7C6 pin 2 +80vdc
7B7 pin2&3 +80vdc
7A8 pin 2&3 +80vdc
Measure with the - meter lead connected to the - lead of the filter condersers
That's a good start, report back.
Is it raining down there yet???

GL
Terry
(This post was last modified: 10-07-2015, 04:15 PM by Radioroslyn.)
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Eric
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#3

10-05-2015, 01:26 PM
(10-03-2015, 05:56 PM)Radioroslyn Wrote:  Doesn't look like it. But since your a nice guy I'll give you the Terry's voltage chart:
35Z3 Pin 7 +100dc
35A5 pin 2&3 +90vdc  Pin 5 -8vdc.
7C6 pin 80vdc
7B7 pin2&3 +80vdc
7A8 pin 2&3 +80vdc
Measure with the - meter lead connected to the - lead of the filter condersers
That's a good start, report back.
Is it raining down there yet???

GL
Terry
Terry 
been away from it for a few days otherwise known as honey do list. We had about 6 days of rain here about 6" or so over those days, nice today!
My other issue is I have a 50A5 in place of the 35A5 I think it should work if every thing else is ok? I have a 35A5 on the way also have the dreaded rubber wire insulation issue.

Thanks
Eric
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Radioroslyn
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#4

10-05-2015, 04:48 PM
No Problem.
We got some rain but nothing spectacular.
Yes the 35A5 will help unless you a 140vac line.

GL
Terry
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Eric
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#5

10-05-2015, 05:14 PM
Did the checks with the 50A5

7C6 is it Pin 2? I get 78vdc

On the 50A5 (35) Pin 5 is 0 
7B7 Pin 3 is 43vdc
Everything else looks good. Did find this on the 50A5 a short pin (pin 2)


Was supposed to go to Charleston Sc on Thursday for a Navy reunion I'm pretty sure it will be cancelled.


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Radioroslyn
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#6

10-07-2015, 04:14 PM
Yep you got the right pin 2 on the 7C6 it's the triode plate (1st audio stage)
The short pin on the 50A5 is unused so it doesn't matter.
Check #21 (120 ohm i/2w) maybe be bad.
Got a son down there in N Charleston, he is doing ok.


Terry
(This post was last modified: 10-07-2015, 04:26 PM by Radioroslyn.)
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OldRestorer
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#7

10-09-2015, 05:53 PM
PT-69 is a lovely chassis isnt it, lol


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Times I have been electrocuted in 2021
As of 1/01/2021
AC: 4 DC: 1
Last year: 6
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Radioroslyn
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#8

10-09-2015, 10:28 PM
I've seen nicer!!!
Terry
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Eric
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#9

10-22-2015, 06:06 PM
Finally got back to it, also got the 35A5 but I had a problem to sort out mainly putting a cap end to the wrong place that's where your voltages helped me fined it and I replace some brittle wiring. The radio plays great so I decided to do a experiment. I put back in the 50A5 and the radio works pretty good almost no difference on the strong stations but the weaker ones were pretty much gone. 
Thanks for all the help when I get it together I will post a picture.

Eric
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Radioroslyn
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#10

10-22-2015, 06:10 PM
My pleasure!

Terry
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