Thank you Tom & Tom for your insights on the Harbach softkey. I
contacted Harbach and was told I could either send in the older softkey
for modification, or order the newer version which should work with my
SDR-1000.
Now all I gotta figure out is how to keep RF out of my computer. 500
watts PEP on 40 meters and my computer reboots. Anything over 400 watts
on 10 meters sets my smoke alarms off. That's a real wake up call. :)
I've got snap-on ferrite beads on all my cables plus a couple of common
mode chokes. Guess I'll work on my grounds some more...
73,
Jerry Sharp, KD0GS
TOM BLACKWELL (nt) wrote:
Harbach has changed the circuit since then, to operate with a Flex 5000a.
Jerry Sharp wrote:
Hi all, I just recently picked up a nice Heathkit SB-200 amplifier to
run with my SDR-1000. The SB-200 has the Harbach softkey mod, so the
keying line has only a couple of volts and milliamps on it.
Problem is the X2 port on the SDR won't fully key the amp. I can hear
the amp relay "click", but I show no idle current. When I apply drive
the amp relay starts clicking and cycling. Power out of the amp is all
over the place.
A direct short to ground across the keying line and the amp works
fine...90ma of idle current and 600 stable watts out when I drive the
amp with the SDR. For the time being I'm using a footswitch to key
the amp. But I'd rather have the SDR directly keying the amp.
So other than adding another relay between the X2 port and the amp
keying jack, does anyone have a better idea?
BTW, I've tried pin 7 plus several other X2 keying ports with the same
results. X2 TR sequencing is turned on.
Thanks,
Jerry Sharp, KD0GS
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