[Elecraft] K4 recommendation - wait for HD or no?

[Dave (NK7Z)]

Hello Joe,

I am in somewhat the same situation as you are, just not as bad...  I 
have a KW level Amateur living about 700 feet from me.  I had a K3, and 
as long as we were not within 50 KHz of each other, he really did not 
bother me, save when he was hammering his ALC-- but that is a different 
story...

I also have several other Amateurs all living maybe 1 to 2 mile from me. 
  All running 500 to 100 watts.

I was very worried that the K4D would have issues with any of them when 
they were transmitting.

So far the K4D had behaved as the K3 did, some interference, (not much), 
when the KW level fellow comes on line, and only on the same band.  I 
have tested other bands while the KW level ham is transmitting, and if I 
am on a different band, I can not hear him...  With regards to the 
Amateur running 500 watts a mile from me, the K4D behaves marginally 
BETTER than the K3 did.

That is not the same as having another ham a one wavelength away, as you 
describe, so your mileage WILL vary...  I will NOT be purchasing the HD 
module, as it appears I do not need it...

My guess is you will see worse performance than I do, due to your very 
close proximity to the other Amateur, but I can't predict how much 
worse...  The K4D is remarkably tolerant of strong signals.

73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources

On 1/18/23 11:53, Joseph M. Durnal wrote:
> I share a property line with another ham.  Some of his low band wires are
> within a wavelength  of my vertical.  When he's  transmitting, I rarely
> notice with K3 unless I'm really close.  The IC-7300, he can wipe out my
> receive if we are trying to work on the same portion of the band.
> 
> I have my sights set on a K4D, but wondering if I should be considering the
> HD version.
> 
> Thanks & 73 de Joe NE3R
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