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 Post subject: Westinghouse
PostPosted: Mar Sat 03, 2012 4:27 pm 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 2756
Location: Gainesville, Florida
found an H-902 dirt cheap not working just the way I like them. looks excellent. no sound except for teeny-tiny barely . touching electrolytic across a few no change. replace a couple anyway. now no teeny-tiny. uh-oh. start checking power, continuity. no ohm reading OT primary except for CT to one side. just flickering OL on the meter across the other sides. jumpering another OT across the original and voila. is working. the replacement is a little fat from Radio Shack that I have. maybe a re-solder job might get lucky. anyway I am hooked on pocket transistor sets. just need to find some good parts suppliers :shock:

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 Post subject: Re: Westinghouse
PostPosted: Mar Sat 03, 2012 8:19 pm 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 2756
Location: Gainesville, Florida
removed the output audio transformer to test. open primary. looking around I am not finding anything yet. it is red in color and the only thing written on it is P-58. looks to be CT primary and two wire secondary PCB mount to 8 ohm speaker.
anyone out there in transistor land know where I could find such a thing. much obliged

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 Post subject: Re: Westinghouse
PostPosted: Mar Sun 04, 2012 1:06 am 
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Joined: Jun Tue 21, 2011 8:27 pm
Posts: 2087
Location: Virginia
I *think* I've got the schematic for that guy. When I get home I'll check.
AFA the output transformer, I might be able to dig up a replacement out of an old transistor radio.
However, I'm not sure if the impedance ratio is correct, but I can send you one if you wish.

~ Mitch ~

BTW, yours is nearly the identical radio in Mal Fuller's thread: "Help Needed"
http://www.antiqueradios.com/forums/vie ... 4&t=167722


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 Post subject: Re: Westinghouse
PostPosted: Mar Sun 04, 2012 1:59 am 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 8767
Location: SoCal, 91387
The cheapest parts suppliers -except for Electrolytics, which you want brand new, are other -not especially valuable- Transistor sets.

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 Post subject: Re: Westinghouse
PostPosted: Mar Sun 04, 2012 12:29 pm 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 2756
Location: Gainesville, Florida
that would be super Mitch. I will send PM info. muchas gracias

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 Post subject: Re: Westinghouse
PostPosted: Mar Sun 04, 2012 1:27 pm 
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Joined: Jun Tue 21, 2011 8:27 pm
Posts: 2087
Location: Virginia
Got the PM. Will check my junkbox when I get home Sunday eve.

Here's the schematic, courtesy of Ed in SoDak:
http://www.whiteriverprep.com/mal/38layout.jpg
http://www.whiteriverprep.com/mal/39schem.jpg

~ Mitch ~


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 Post subject: Re: Westinghouse
PostPosted: Mar Sun 04, 2012 3:16 pm 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 2756
Location: Gainesville, Florida
fantastic. thanks to you and Ed. great print. can see CT to 8 ohm like I thought. primary should be about 1K I guess. new to transistor radio so I am guessing some stuff. the radio works fine with Radio Shack AF transformer but its way too big. no way to close the case :shock:

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 Post subject: Re: Westinghouse
PostPosted: Mar Fri 16, 2012 1:24 pm 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 2756
Location: Gainesville, Florida
got it working. found an AF output transformer at Mouser 42TL013-RC 1K/8ohm. exact same size. should have been 800ohm primary but is working fine
Image

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 Post subject: Re: Westinghouse
PostPosted: Mar Sat 17, 2012 1:46 am 
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Joined: Oct Mon 26, 2009 10:02 pm
Posts: 1721
Location: Indianapolis, IN
Great !

Always good to hear 'em playing when you're done fixin' !


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 Post subject: Re: Westinghouse
PostPosted: Mar Sat 17, 2012 3:22 am 
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Joined: Jun Tue 21, 2011 8:27 pm
Posts: 2087
Location: Virginia
Doubt you'll ever hear the difference between a 1k/8ohm to a 800/8ohm.
That's a deviation of 20%, which is about the same tolerance on most resistors.

no biggie. :)

~ Mitch ~


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