[Elecraft] Field Day

[Jim Brown]

Thanks for the input, Gerry. The 18-turn choke described below would be 
a good starting point for RFI on the AM broadcast band.

73, Jim K9YC

On Tue,6/7/2016 2:46 PM, Gerry leary wrote:
> I found an off a lot of interference on the a.m. band from other radios. So for example my roommate who lives downstairs, couldn't use much of his a.m. radio receiving abilities when I use that charger..
>
> Sent from my iPhone this time
>
>> >On Jun 6, 2016, at 6:27 AM, thelastdb<thelastdb at gmail.com>  wrote:
>> >
>> >I have not experienced any RFI from my 4A Genasun MPPT controller.
>> >Myron WVØHPrinted on Recycled Data -------- Original message --------From: Jim Brown<jim at audiosystemsgroup.com>  Date: 6/6/2016  4:20 AM  (GMT-07:00) To:elecraft at mailman.qth.net  Subject: Re: [Elecraft] Field Day
>>> >>On Sun,6/5/2016 7:50 PM, Howard Hoyt wrote:
>>> >>Has anyone on this list used one of the Bioenno MPPT chargers, and are
>>> >>they RF quiet?
>> >
>> >Pretty quiet, but not totally so. The answer depends on proximity of
>> >antennas and operating frequency. I just tested the 4A charger they
>> >supplied for my 20Ah battery and heard a very low level buzz on the 160M
>> >antenna 25 ft from my shack. A choke with 18 turns on a single #31
>> >2.4-in diameter toroid killed it.