Thanks for suggesitons.
and
Thanks BAMA!
It sure helps to have a schematic.
SB200 has grids at RF ground and
cuts tubes off with a neg bias to grids.
I'm going to nip the wire, lock the relays down
and try keying via the neg 90V keyed line
from the HW-16.
If this doesn't work, will look at either MOSFET or
using the neg bias from the amp for keying the
HW-16 rather than the other way around.
Will post pix and results to www early next week.
-bob
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