[Elecraft] Strong Rd feedback in mh3

[Don Wilhelm]

Ed,

Yes, that can be common with long wire antennas - that can happen with 
any transceiver, it is not unique to the K3 or KX3.

Change the length of your long wire by 1/8 wavelength at the frequency 
you are having trouble with.

The situation is that you have a high RF voltage on that antenna near 
the shack end.
Even though the tuner can match it, it can produce a strong RF Field in 
the shack.

73,
Don W3FPR

On 5/28/2016 11:17 PM, Edouard Lafargue wrote:
> I was operating portable today, with a long wire in a tree  and
> counterpoise on the ground, and no matter what I did, every time I pushed
> the mic button, I got super strong RF feedback in audio monitoring,
> apparently picked up by the MH3 cable - things got slightly better if I
> tried to bunch/coil the MH3 cable. Is this common?
>
> I only managed to work one station in Indiana in the time I tried, most of
> the time what I heard in my headphones while transmitting was
> unintelligible garble, so it is no surprise others didn't hear me, I
> guess...
>
> My KX3 has got an internal ATU and it managed to match the long wire
> perfectly at each frequency I tried to operate...
>
>