Philco 38-3

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Re: Philco 38-3

Post by Dr. Radio on Sat Apr 26, 2014 9:25 pm

Too far for me to drive. Is this it? Maybe you can sweet-talk the seller into shipping....?

http://www.ebay.com/itm/1938-PHILCO-38-3-CHASSIS-TUBE-RADIO-WORKING-GREAT-GRANDFATHER-CLOCK-6F6-TUBES-/281318909632?pt=LH_DefaultDomain_0&hash=item417fe9e6c0
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Re: Philco 38-3

Post by jerryhawthorne on Sat Apr 26, 2014 9:38 pm

My Dr. Radio, that is a nice find. Now if it was only in AZ. the CAT would be in fat city. pale 

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Re: Philco 38-3

Post by Wildcat445 on Sun Apr 27, 2014 12:38 am

Thanks, Doc. That would fix me up. I will keep that in mind. I'm not sure if the guy who owns this thing wants to fix it with all that is wrong with it. I've got half a coffee can full of junk parts that I have removed, and I'm not done yet. Thanks, Doc and Jerry for your interest and input here.

Regards

WC

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Re: Philco 38-3

Post by Bill Cahill on Mon Apr 28, 2014 10:46 am

You're welcome.

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Re: Philco 38-3

Post by Wildcat445 on Mon Jun 16, 2014 1:02 pm

Bill pretty much had this one nailed. After I got all the bakelite blocks restuffed, all the other caps replaced, several resistors replaced, especially in the area of one of the output tubes, I checked the resistance on B+ with the speaker plugged in and I still had a fairly heavy short to chassis. With the speaker unplugged, this cleared the short. I decided, just for grins, and for a few seconds only, to apply power with my dim bulb in the circuit. to see what was actually going on. The short was heavy enough to light the bulb fairly brightly. There was B+ on one output tube as well as screen voltage. For reference, I only went to about 60 volts max at any time. There was no voltage on the plate one one of the output tubes. Appparently, one half of the primary of the output transformer actually shorted, and all hell broke loose. Whatever happened took out the power transformer, output transformer, one 6F6G, several resistors and at least the cathode bypass cap. Bill mentioned his experience with a shorted output transformer. I had never ran across one. Again, for grins, I cut the leg of the transformer loose that checked shorted, and this cleared the short. I still don't have any voltage on one 6F6, naturally, but the dim bulb is now dim. I learned something on this one. All the filter caps in this radio were original.

WC

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Re: Philco 38-3

Post by 75X11 on Mon Jun 16, 2014 1:09 pm

Sorry to see that happen. It seems like this sort of thing happens too often on one done for someone else.
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Re: Philco 38-3

Post by Bill Cahill on Mon Jun 16, 2014 7:29 pm

Thank you. I've seen that happen more than you can believe. Philcos are widely known for it....
RCA had problems with open, and, partly open. My 16" round Admiral had a wide open transformer, and, of course, it wrecked the output tube. No surprise here.

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Re: Philco 38-3

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