Brian,
The Keying line should not need buffering. It is either an open circuit
or a closed circuit.
Yes, you may be asking for trouble if you attempt to use the AUX cable
with a long length.
So connect it for the basic mode connections only. KeyOut from the
transceiver to the KAT500 and then from the KAT500 to the amplifier KeyIn.
73,
Don W3FPR
On 11/3/2018 1:23 PM, Brian Hunt wrote:
I've been looking at this very issue as part of a project to QRO on the
lower bands. I currently have an MFJ autotuner at the end of a 130 ft
coax run out to the garden. My low band doublet is fed with a balun and
ladder line from there. It's really impractical to run the AUX cabling
out and back as indicated in the KAT500 manual. But it may be practical
to run a keying line out and back and a serial line as Wayne indicated.
Would the key line need buffering with that long a run? A total of 5
wires required. A CAT-5 cable could provide a twisted pair for each
signal line to avoid RFI. Power for the KAT500 could be provided using
a bias-T arrangement as I do now. Any other thoughts/considerations?
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