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Northern Electric 1121 no voltage on 6V6

Tube Radio Forum - The friendliest radio forum on the net! :: Electrical restoration

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Northern Electric 1121 no voltage on 6V6 Empty Northern Electric 1121 no voltage on 6V6

Post by Dan Walker on Mon Aug 06, 2018 7:52 pm

I have changed the electrolytic caps in this radio , and when I turn it on I can hear a bit of a hum in the speaker.
I have no voltage on the output tubes [6V6]
Maybe someone could point me in the right direction.
I have another one of these and it works good.

http://pacifictv.ca/schematics/ne1121data.pdf
Thanks
Dan in Calgary

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Northern Electric 1121 no voltage on 6V6 Empty Re: Northern Electric 1121 no voltage on 6V6

Post by Dan Walker on Mon Aug 06, 2018 11:34 pm

Well I went through the schematic and I found that someone had taken out a resistor that was critical , and after replacing it, I have the radio playing .
So all I have to do now is change the other 15 caps
Dan in Calgary

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Northern Electric 1121 no voltage on 6V6 Empty Re: Northern Electric 1121 no voltage on 6V6

Post by Bill Cahill on Mon Aug 06, 2018 11:52 pm

Congradulations. I bet it was one of the negative bias resistors.

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Northern Electric 1121 no voltage on 6V6 Empty Re: Northern Electric 1121 no voltage on 6V6

Post by Tony V on Mon Aug 06, 2018 11:57 pm

Good for you Dan! I'm glad you found the problem! It's always good to check over old repairs before getting too deep into a restoration as those "bugs" will drive you crazy Smile
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Tube Radio Forum - The friendliest radio forum on the net! :: Electrical restoration

 
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