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Vintage Amateur and Military Radio Amateur/military receivers and transmitters, morse, and any other related vintage comms equipment.

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Old 15th Nov 2021, 6:51 am   #1
nemo1956
Triode
 
Join Date: May 2016
Location: Phimai, Thailand.
Posts: 40
Default Hallicrafters SX122A

I've had this radio for a long time now but not used it.
Now it seems very deaf.
I've re-caped it and replaced many of the resistors as they had gone just out of spec and tested all the valves/tubes
but it's still very deaf.
Even the xtal calibrator is very low signal.
Has anyone worked on this radios that can give me a clue?
many thanks.
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Old 1st Dec 2021, 9:34 pm   #2
nemo1956
Triode
 
Join Date: May 2016
Location: Phimai, Thailand.
Posts: 40
Default Re: Hallicrafters SX122A

Hi all. Update on this radio.
I found the problem. The two first If transformers had the internal capacitor problem so I very carefully removed them and took them to bits.
The capacitors had lost of white whiskers all over them and had broken. I cut them out and replaced all four (two in each).
Did a realignment and all is well now.
It's working like new again.
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