I have an endfed wire antenna for the low bands so there is RF in the
shack which needs to be managed. In such a case a field strength meter
is handy in figuring out how to arrange equipment, cables, keyboards,
etc and placing ferrite toroids and snap-ons for best results. I use an
old Simpson 374 microameter with a germanium diode across the terminals
(cathode to plus terminal); it makes a good RF sniffer...
73,
Drew
AF2Z
On 07/16/16 08:28, Kevin - K4VD wrote:
Hi Howard and thanks for your explanations and patience. I need to do some
more testing a little later on with the KX3 on the RS-50. If I remember
right, I could hear the hum and hiss from the RS-50 only when the antenna
was attached. I think that goes along with what you are saying and I just
need to wrap my mind around that. I am prepared to deal with RF issues
while transmitting but not so prepared to think the problem could show up
during receive also.
So far I've added the NI4L HF Choke/Line Isolator just under the BALUN at
the feedpoint and another just at the rig. I've also added a few snap-ons
to the DC cord between the RS-50 and the radio at the RS-50 side. I want to
add more as soon as I can find the rest of them or possibly replace them
with the 2.4" ferrites at your site.
After doing the above I've noticed my tuning points have shifted a bit. I
need to get the analyzer on it to see by how much. I also *maybe* noticed a
reduction in noise on the Flex but to tell you the truth, I never really
noticed it on the Flex, only the KX3 made it obvious being able to switch
from battery to external power supply.
I need to do a little more testing if I can find the time this weekend. I
see the 2.4" ferrite core on your website and will probably place an order
for a couple/few. Does something like this go on each end of a line or do I
pick an end?
Thanks again,
Kevin
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