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Old 02-12-2010, 08:51 AM
k9yli k9yli is offline
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I think, if i remember from when i looked at a year or so ago it is just a 6.3 volt filiment transformer wired backward off the 6.3 volt filament line.

120 ac out. simple rectifier/ cap circuit.
very little current drawn..
no real load on the filament transformer.

i havent finished yet but the heath has plenty of room to mount two dow key relays i accuired, under the chasis...

bias supply is also mounted under the chassis..

for the relay power i have a 12 volt 1 amp wall wart to wire in..

only modification to the heath is replacing the two rg8 cables under the chasis to the SO239s with new cable running to the relays.

nothing external or holes in the cabinet.
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