[Hallicrafters] SX28 power transformer

[k0ewu at juno.com]

SOAP BOX #2 ON!                
        Regarding this "Bring it up slow on the"variac".
This is of no good as the rectifier cannot conduct till the cathode is
hot.
then the almost full voltage is applied.
If you really want to do this, put a solid stat rectifier in place of the
tube, 
monitor the dc plate voltage and the tx input current.if all goes well
the input current will increase as the input voltage increases and should
drop down as the caps reform.The dc out will follow the input, but   if
the dc suddenly drops quite a bit
and no longer increases as the input does--there is a low resistance
short some where.  

BUT do not do this if the rig has been stored in a damp or high humidity
location
for some months.     next

 AN easy way to warm the trans former is to apply  dc current of about
700 ma to the ac input, short the rectifier socket plate to plate to
protect from surges as the dc is applied or removed.
The transformer should warm up from the current in the primary in a short
time , let it cook this way for 6 to 8 hours, remove the short on the hv
winding (at the tube socket)
after the dc is removed
then use the forming excersize as above.
I have used this method for years to dry out motors, transformers and
other ac devices after total immersion in flood waters and other fresh
water dunking.

cAN OTHERS ADD TO THIS?  comments?

JACK----------K0EWU at juno.com