ASTRON.1
 
TO: ALL - -ASTRON RF MOD
FROM: KB9FWF
 
I HAVE IT FROM ICOM THAT SOME OR ALL ASTRON POWER
SUPPLIES CAN COOK YOUR RADIO.  APPARENTLY RF
FEEDBACK FROM THE RIG CAN FOOL THE RADIO INTO
THINKING THAT THE RADIO NEEDS MORE POWER AND
THE POWER SUPPLY WILL SHOOT 20 VOLTS OR MORE
INTO THE RIG AND FRY IT.  NOW, I HAVE AN EARLY
ICOM 751 WITH AN ASTRON RS20M.  ICOM DIDN'T SAY
IF IT WAS JUST THIS COMBINATION OR NOT SO UNTIL
I HEAR FROM ASTRON, BE CAREFUL.  THE FOLLOWING
MOD WILL CORRECT THE PROBLEM...
 
+ ----------------------------------------- +
 POWER    :                 B :             OUTPUT
 SUPPLY   :A                  :-------G       TO
 TERMINAL :                 C :              RADIO
          :                   :
- ----------------------------------------- -
 
A = 1000uf 25VDC
B & C = .01uf 500VDC
G = CHASSIS GROUND
 
                        73, Al  - KB9FWF @ W9ZMR.IL.USA.NOAM -