Obscure radios

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Re: Obscure radios

Post by Bill Cahill on Wed May 06, 2015 6:35 pm

Nice walnut case.

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Re: Obscure radios

Post by jerryhawthorne on Wed May 06, 2015 6:58 pm

Bill, start a thread when your ready to work on your radio. Add pictures please! We will all be here to totally confuse you with our ideas. Laughing Laughing
I'm getting excited, we have people working on radios!
Jerry

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Re: Obscure radios

Post by Bill Cahill on Wed May 06, 2015 8:08 pm

Now, if they'd only post more on them. It will be sometime before I can work on it, even with as much as I'd love to get my grubbies on it.
I have at least five projects to catch up on,, including the family tv, and, two lamps to rebuild, again. Lousy Chines sockets keep going bad.....
And, yes, I will post pictures. This will be quite a complicated project, on parr with the family tv, and, my yet unfinished, though at one time playing RCA 8TR29 tv radio. Yes, I'll get it playing again...

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Re: Obscure radios

Post by Wildcat445 on Thu May 07, 2015 12:31 am

That is the radio, Jerry! Very Happy

Thank you! Now I need a schematic. I could probably guess. It is an AC-DC set, so it should not be rocket science. The original filter cap is in a can on top. There have been three electrolytic caps added. They are wired in with electrical tape, but that matches the WHITE power cord. I believe the filter caps are a 40uf and a 30 uf. Thanks, again, Jerry.

Jerry, have you been following my working on the radios I got at the auction? On the "I'm not a hoarder" thread.

WC

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Re: Obscure radios

Post by jerryhawthorne on Thu May 07, 2015 1:38 am

WC, have you run the tube line up through some site that I don't remember the name of to see if you can get a match?  Sorry I may need to look for your "I'm not a hoarder" thread.  Must have missed that.  Certain I can confuse you as well with miss direction on repair!
If the only problem on your nice Silvertone is the cap replacement it should be easy to clean that up and of course stuff the can.  
Best, Jerry

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Re: Obscure radios

Post by Wildcat445 on Thu May 07, 2015 8:35 am

I did not even think to look on the ARF archives for the model number. My concern at this point is if this radio has a curtain burner cord or something kinky like that. The original can filter cap appears to have had three wires coming out of it. There have been three electrolytic caps taped into the chassis to replace it. At least one of these has one element in the capacitor taped off and not used. It appears that whoever did this used what was on hand, rather than the correct component. They did not use electrical tape, but rather used friction tape. Miles and miles of friction tape. The original brown power cord had been cut off and a huge white cord friction taped to the ends. Totally sloppy and extremely dangerous. My thinking is that a 47 and a 33 uf electrolytic may be about right. Or two 47's. I'll do some more looking and make some resistance measurements and make a better evaluation at that time. Thanks, Jerry.

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Re: Obscure radios

Post by Wildcat445 on Sun May 10, 2015 9:23 am

I need a schematic for the Silvertone radio. If anybody has an idea where, I'd be much obliged.

WC

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Re: Obscure radios

Post by mr_ed01 on Sun May 10, 2015 9:52 am

Try Rider _ Sears 12-13

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Re: Obscure radios

Post by Wildcat445 on Sun May 10, 2015 11:37 am

Thank you! That will provide the information I need. Either the diagram is drawn differently or this is a strange setup. It also shows a 35Z6 rectifier. The radio currently has a 25Z6. Looks like some sort of voltage doubler setup. Interesting.

WC

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Re: Obscure radios

Post by jerryhawthorne on Mon May 11, 2015 3:37 pm

WC, on your 1671 Silvertone I received a message from "Steve" on ARF who had completed one of those radios.  He indicated the 1571 schematic was the one he used.
Best,  Jerry

http://www.nostalgiaair.org/PagesByModel/688/M0016688.pdf

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Re: Obscure radios

Post by Wildcat445 on Mon May 11, 2015 4:31 pm

Thanks, Jerry. I'm sure glad to have a schematic. The one I have is wired wrong. I don't see anything fried that is obvious. It has a 25Z6 rectifier. I don't have a 35Z6. I appreciate everyone's help on this.

WC

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Re: Obscure radios

Post by jerryhawthorne on Mon May 11, 2015 5:26 pm

Us AZ dudes have to stick together but I'm in CA now and I suspect your in the midwest?
At any rate the 25Z6 will put a heck of a strain on the tube filaments. The 35Z6 better, if your line voltages are in the 125V range, a 50Z6 will keep your tubes very happy!
Jerry

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Re: Obscure radios

Post by Wildcat445 on Mon May 11, 2015 6:09 pm

I'll look and see if I have a 50Z6. I appreciate that information, Jerry. I can't imagine them being very expensive if I need to buy one. I'm in the midwest.

WC

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Re: Obscure radios

Post by Wildcat445 on Tue May 12, 2015 11:06 am

Somebody posted on this thread about a Monarch radio. Some of those were made by Detrola. Listing the tube complement and checking Detrola schematics on Riders or Beitmans of the approximate age may yield some results.

WC

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