[Elecraft] K4 Experience

[Jim Brown]

On 7/5/2021 3:33 PM, bruce whitney via Elecraft wrote:
> Here is a bit of information that may be of interest to those thinking about the K4HD.We were operating the K4, CW (BTW - fabulous QSK!) on a 40M ground plane antenna about 150 ft from a station on  40M SSB using an inverted vee antenna..

For CQP expeditions, we've run CW and SSB K3/KPA500 stations on the same 
band with that sort of separation. Antennas are carefully located and 
oriented so that antennas for each band are colinear. Resonant dipoles 
on 80 and 40, yagis on the higher bands. Here in California, we don't 
need to rotate antennas during domestic contests -- we aim to PA (about 
70 degrees) and antenna directivity lets us work everyone who's in the 
contest.

An important part of the antenna system is a serious common mode choke 
at the feedpoint if each antenna, so that current coupled from the 
feedline doesn't fill in the antenna's nulls.

73, Jim K9YC