[Elecraft] RF feedback problems with P3 and external keyboard

[Brendon Whateley]

I might suggest that folks do not neglect that the RF may be getting into
the keyboard, causing its microcontroller to crash. Remember that we live
in an "Everything is a computer" world.

- Brendon
KK6AYI

On Sun, Nov 26, 2017 at 10:22 AM, Jim Brown <jim at audiosystemsgroup.com>
wrote:

> Good advice, Kevin, especially winding as many turns as practical.  I
> wouldn't add the extension unless a choke without it didn't solve the
> problem.
>
> 73, Jim K9YC
>
> On 11/26/2017 8:52 AM, Kevin Stover, AC0H wrote:
>
>> The mix of the toroid's used does matter. Mix 31 is best.
>>
>> Here is what I did with a USB mouse.
>> I bought four mix 31 snapon's and installed two 18 inches back from the
>> mouse and another pair 18 inches back from the connector, winding as many
>> turns as would fit. I bought a USB extension cable and wound most all of it
>> on a mix 31 2.4 inch toroid. This choke was installed on the computer end
>> and the choked mouse cable was plugged into that.
>>
>> All of this assumes you have things properly bonded, especially the
>> computer case/chassis.
>>
>
>
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