Yeah, I had to replace both the line isolator and the 4:1 balun at the
feedpoint after about 2 years.
73, Pete N4ZR
On 11/8/2023 11:02 AM, Tom Doligalski via Elecraft wrote:
I have used one for years. That said, I have had to replace the line isolator
several times!
Also have one in the shack.
Tom W4KX
Sent from my iPad
On Nov 8, 2023, at 10:49 AM,j...@kk9a.com wrote:
I am not very familiar with a Carolina Windom but I believe it is just a
horizonal wire fed off center. These types of antennas can have significant
common mode current on the feedline. Perhaps there is more current on 40m
than on 80m so it works on 80m.
A resonant dipole with a choke may solve this HI CUR issue.
John KK9a
Pete Smith N4ZR wrote:
I send a few characters of CW into my Carolina Windom on 40M and after a
delay (1-5 seconds after I stop sending) the K3 flashes a HI CUR
warning, and the audio gain is reduced significantly. Touch the AF gain
control and it instantly returns the gain to normal, but frequently the
HI CURR warning returns over and over, without any additional
transmissions. This sequence does not happen, even with 1500 watts,
into my dummy load, nor does it happen on the same antenna on 80M, or on
20 meters on my tribander.
I've read the HI CUR warning discussion on page 65 of the manual, but it
doesn't seem relevant, because I don't have external speakers. The fact
that it only happens when feeding an actual antenna on one band
suggests RFI, but the fact that the HI CUR warning and gain reduction
recur again and again long after any RF has me puzzled. Any suggestions
gratefully accepted!
--
73, Pete N4ZR
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