[TowerTalk] How to mod a 40m 4-square for 10m use?

Mike Smith VE9AA ve9aa at nbnet.nb.ca
Sat Jan 22 17:22:41 EST 2022


I am trying to go to all 4-squares like my contesting 4-sq buddy John, N8UM
in TN.

I am nearly there, having just installed a 15m one in time for CQWW CW.

There are no new dedicated 10m 4-squares to be found commercially, if my
internet searching skills
are telling me the truth, so recently I bought a 40m 4-Square (Older Comtek,
NOS)  and am hoping to mod it for 10m, but I have no idea where to start.

I'll PRESUME the capacitors need to be a different value in the exterior
switch box, but to what?...anyone have a schematic for a Comtek 4-square?
(the outdoor portion)

Apparently Tim, K3LR (DX Engineering) was not happy with the performance
from the 10m Comtek 4-squares, so is not selling them anymore. I can
definitely respect that decision to not produce a top-notch product.  I am
not looking to squeeze every fraction of a dB out of a 10m array.  I just
want something that 'works', is directional and has some modest amount of
gain.

(I have built several K1WA/K8UR arrays and am not totally happy with them)

My SO2R contest station uses a single horizontal antenna on the 2nd radio
and a bunch of vertical 4-squares on the primary radio.

Any ideas on the Comtek Mod fellas?

Tnx

Mike VE9Antenna Antenna

Mike, Coreen & Corey
Keswick Ridge, NB




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