Happy holidays everyone.
Please check out the rules page for the upcoming CQ160 Contest in 2020.
There have been some changes, mostly for the better I hope.
These include:
Low Power is now limited to 100W only.
Assistance is allowed in QRP category.
Single Op Low Power now has both Assisted and
Plaques???
Did someone say PLAQUES?
While the CQ 160 is indeed a fine contest - we should note that the
upcoming Stew Perry Topband Distance challenge also has plaques. Has
N2NT's wife sponsored a plaque? I think not!!
Here is the current list:
SponsorPlaquePaid
AA4XX Top Score, Multi-Op
Hi Frank!
Thank you for sharing this experience. This is interesting, because (as you
are probably aware of) no less a guru than N6LF published results showing
that with a single antenna, four λ/4 elevated radials were nearly identical
in performance to 120 on the ground. This is true *only* if RF
Mike,
I think the problem with elevated radials in 4 squares is the mutual
coupling and the necessity that the radial current and impedance be
equal. Otherwise the pattern is distorted.
Having measured my 8 125' elevated radials there is a significant (>2:1)
current imbalance in them due to
Coil 3.77 is now available replaces coil 3.72
http://ham-radio.com/k6sti/coil.zip
Jim VE7RF
_
Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
Mike,
I think the performance of a 4-square array may relate to the reason
why switching to 30,000 feet of radials made a dramatic improvement.
The currents in the elevated radial currents might be badly mismatched
by proximity to currents in nearby radials. I never tried to measure
them.
