>
>Rich,
>
>Thanks for the note.
ur welcome.
>Been learning fast. If the problem is simply (I
>doubt it...) the relay, why not just swap out the old one with something
>faster?
I know of no multiple pole 1500 RF watt capable relay that switch in 2mS.
>Why all the changes to the grid-to-ground circuit?
>
The high speed switching circuit is designed to be powered by a (100v to
160v) Positive source. The SB-200's mickeymouse T/R bias switching
circuit uses a negative supply. For the high speed switching mod, the
SB-200 needs to be converted to the standard configuration using a
positive supply, like the SB-220.
- later, Tom
Rich...
R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures
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