[Elecraft] HI CUR warning on K3

[Pete Smith N4ZR]

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,john at 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
>>
>> ______________________________________________________________
>> Elecraft mailing list
>> Home:http://mailman.qth.net/mailman/listinfo/elecraft
>> Help:http://mailman.qth.net/mmfaq.htm
>> Post:mailto:Elecraft at mailman.qth.net
>>
>> This list hosted by:http://www.qsl.net
>> Please help support this email list:http://www.qsl.net/donate.html
>> Message delivered tow4kx at mac.com
> ______________________________________________________________
> Elecraft mailing list
> Home:http://mailman.qth.net/mailman/listinfo/elecraft
> Help:http://mailman.qth.net/mmfaq.htm
> Post:mailto:Elecraft at mailman.qth.net
>
> This list hosted by:http://www.qsl.net
> Please help support this email list:http://www.qsl.net/donate.html
> Message delivered topete.n4zr at gmail.com