[Hallicrafters] SX-42 transformer problem - help!

[Julian Bunn]

Sorry, I should have been more clear: the fizzing continues with the 
octal plug removed and the 5U4G removed :-(

(And the Send/Receive switch in "Send".)

Julian

Thierry Stora (Cegetel.net) wrote:

> Hi readers,
>
> You do not tell if there is still noise from the transformer with the 
> rectifier tube removed...
>
> If there is no more noise in this condition (i.e. 5U4 being out of its 
> socket), a common cause for this kind of problem is a worn filter 
> capacitor. These can show a permanent resistance of a quite low value, 
> partially shorthing the output of the rectifier and cause the death of 
> the transformer. Very common failure on all vintage electronic equipment.
>
> So I would check this electrolytic cap first!!
>
> Regards,
>