[Elecraft] Background Noise with Mike Plugged in to Rear Mike Jack

[Wes]

If I wasn't the first, I was the second, person to recommend the CM-500.  I've 
used them on both my original K3 and a new K3S.  IIRC I've gone through three of 
them; buying new ones when the pads wear out.  I have never had RFI issues with 
them (or anything else for that matter).  The only ferrite in my shack is the 
stuff molded on some of the computer cables I use.  I wish my TS-890 had the 
same rear-panel capability as the K3(S) for using these.

Wes  N7WS


On 11/21/2021 6:54 PM, David Herring wrote:
> I also had RF problems with the CM-500 plugged into the rear mic jack.  The solution I’ve implemented so far was to wrap about 13 turns of the CM-500’s cord around a #31 toroid. It both shortened the cord which was way too long for my shack and eliminated the RF problem. A two-for-one solution. ;-)
>
> On rare occasions I like to use my D-104 mic in the front panel jack.  It too is adversely affected with RF issues.  As soon as I get a moment I’m going to try wrapping it’s cord around a #31 toroid and hope it works as well there as with the CM-500.
>
> I hope Elecraft is looking at the front panel mic jack as well as the rear when looking at solving the RF issue.
>
> 73,
> Dave - N5DCH
>
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