pix came out fine.? There must be a 2nd relay for the bias cut off.? ?Only other method if a DPDT relay is used, is to use rf chokes on the input side of the DPDT relay, so do the cut off bias.?
U will have to delve into this more....and see exactly what they have done.? Once that is sorted out.....replacing with vac relays is straightforward.?
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