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Model 640 code 121 : all cathode to ground on my radio
fabignoli
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Posts: 12
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Joined: Nov 2006
#4

06-23-2007, 12:45 PM
Thank you for all your answer.

I think the last owner haven't done a good job. There's lot of bad thing in this radio. The push pull is not here (it's an single ended). I will have to find a driver transformer and a push pull transformer and the original speaker.

I don't no for the cathode but I will add resistor and condenser to make it original.

I think the RF trans former is out of order? I will have to rewind it because there's a wire beetween the antenna and the 6A7 grid to bypass the RF amplifier. Not a good news.

I'm happy to own my second philco. The first one was a model 20 with lot of work (the main transformer was totally burned and I have rewinded it !)

If you want to see what I've done to my philco 20 everuthing is explained here :
http://cfp.radio.free.fr/restaurations/p...lco20.html

have a nice day and than'ks for your answers.

Frederic ABIGNOLI
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Messages In This Thread
640 grounded cathodes - by AI2V - 06-22-2007, 10:09 AM
[No subject] - by Ron Ramirez - 06-22-2007, 11:07 PM
[No subject] - by fabignoli - 06-23-2007, 12:45 PM
[No subject] - by fabignoli - 07-06-2007, 09:47 AM
[No subject] - by Ron Ramirez - 07-07-2007, 06:13 PM
[No subject] - by fabignoli - 07-09-2007, 05:01 AM
[No subject] - by fabignoli - 07-15-2007, 06:23 PM
[No subject] - by fabignoli - 08-11-2007, 02:16 PM



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