[Hallicrafters] SX 42 ac humm

[Edward B Richards]

Hi Steve;

Most likely is a heater-cathode short in a RF or IF tube and it takes a
signal to bring it down to the detector.

73, Ed Richards, K6UUZ
Simi Valley, California, 93065
Home of Air Force 1 Pavilion

On Mon, 7 Nov 2005 22:39:47 EST chandlerh2 at aol.com writes:
>  i have just finished recapping my SX42  all paper caps and 
> electrolytics.
>  i noticed before i replaced the electrolytics everytime i tuned 
> into a very 
> strong signal i would hear an AC hum . so i replaced all 5 
> eletrolytics with 
> brand new ones from 
> Just Radios   . i turned radio back on  and now when i tune into a 
> strong 
> signal i hear a nice  hum  the stronger the signal the louder the 
> humm it 
> definetly sounds like an AC hum .when i am not on a strong signal 
> radio has no hint 
> of any hum clear and quiet . could this be caused from a bad ground 
> because i 
> still have radio on bench using a piece of wire for an anntenna .or 
> could it be 
> the filter choke ??????.
> 
> i have not had radio aligned yet either . any info would be greatly 
> 
> appeciated  and thanks for your help .
> 
> steve
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