[Elecraft] Arc Fault Detector Woes
Tom Doligalski
w4kx at mac.com
Mon Jan 4 17:25:36 EST 2021
Windom is 20’ outside, pretty perpendicular to the house . No problem at 500W.
Sent from my iPad
> On Jan 4, 2021, at 5:22 PM, Jon Poland <jonpoland at gmail.com> wrote:
>
>
> Is the Windom in your attic or outside? My guess is that your antenna is parallel to the house wiring, and is inducing a current on the ground or neutral wire. A replacement AFCI breaker might fix the problem. Or a heavy choke on the AC.
>
> This may or may not be your situation. Most newer houses run all electric wires from the breaker box up into the attic and back down to wherever they need to be. At least in single-story homes. That puts the attic antenna close to the unshielded house wiring.
>
> In my house, it wasn't the AFCI that would go nuts, but the doorbell would ring when I went over 35 Watts on 20m. I had to install a choke on the doorbell wire to stop that. Now, every time I transmit, I imagine the doorbell or smoke detector going off in my neighbor's 2-story next to me.
>
> jon N0WL
>
>> On Mon, Jan 4, 2021 at 2:32 PM Tom Doligalski via Elecraft <elecraft at mailman.qth.net> wrote:
>> Should have mentioned that there up is no trouble at 25 watts.
>>
>> Certainly no trouble at 100 watts back at Field Day.
>>
>> Sent from my iPad
>>
>> > On Jan 4, 2021, at 12:57 PM, Tom Doligalski <w4kx at mac.com> wrote:
>> >
>> > Over the last several weeks I’ve been having problems with the arc fault detector (AFCI) in my fusebox.This does not control the power to the shack, but to our garage door operners.
>> >
>> > It seemed random at first, but I think I’ve tracked it down a bit.
>> >
>> > Running an Elecraft K3/KPA500/KAT500 combo. The AFCI ONLY trips when on 80 CW, running 100 watts (the KPA500 in standby bode). If the KPA500 is ON (running 500 watts) there is no problem.
>> >
>> > Seems fine on other bands….
>> >
>> > 80M antenna is a Carolina Windom. The usual baluns/line isolator/grounding stuff.
>> >
>> > Any ides?
>> >
>> > Kinda worried that there is an issue with the 100 W amp in the K3.
>> >
>> > 73.
>> >
>> > Tom W4KX
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