Tony, N2TK wrote:
Wayne,
To carry this one step more, what about when I am running multiple
K3's on
different bands at the same time? Do you recommend to use external
receive
bandpass filters on the receive lines if I am using receive antennas
on the
Receive Antenna and/or Aux input?
And also use transmit bandpass filters on the transmit antenna input
when I
am using the transmit antenna for both receive and transmit?
Hi Tony,
Every multi-transmitter installation is different. In general, TX and
RX antennas should be well-isolated.
If you hear the COR (carrier operated relay) on any K3 activate --
either the one on its RX ANT jack or the sub receiver's AUX input --
you should try to improve isolation. You'll know it when you hear it,
because T-R normally involves only PIN diodes on a K3. There will be
extreme cases where a band-pass filter or external shorting may be
required, depending on the situation.
There are many multi-K3 installations, some permanent, some for
DXpeditions. We've had many reports about the ability of the K3 to
function well in such cases -- often much better than older rigs. I'm
sure you can get further help in specific situations from some of those
monitoring this list.
I'm not the right guy to ask, at least at present. My entire massive HF
antenna farm is a 50' random wire, 20' up, fed with 300-ohm twin lead.
I have to sign some sort of XYL-related legal papers or buy more
acreage if I want to expand :)
73,
Wayne
N6KR
---
http://www.elecraft.com
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