Problem with the Soft Start module mod for the SB220 from Harbach

[Francisco Viegener]

I bought in Ebay a SB220 Heathkit RFamplifier and after installing the Soft Start Module from Harbach I had a big ,skared,nice explotion, after I pluged it  in the 220volt normal AC pwer line here in Argentina.
Everything was good connected but one of the varistor Z 2 (200VMOV) had exploded and maked a lot dirt inside and near the Start module.
Harbach give you in the kid 1MOV for 390volts that is connected between the two end terminal of the power line were you have 220 volts,this is good for USA and for countries like mine that had 220/380volts.
But then Harbach provide 2 Mov's rated for 200volts that are connected from each of this terminal to ground,and in my case one of this terminal is neutral to ground and the other is hot with 220 volts to ground so the MOVs rated 200volts is to low and that happen to explote it.
Maybe this is not interesting for USA but it is important to all countries with 220/380volts.
(In USA the voltage when the Ampl is connected to 220 volt the voltage between each terminal of the Power line and ground is 110 volts thats way MOVs rated for 200volts are good.)
Thanks , and my intention was to help not to complain, 
Francisco LU3EEC.

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