On Nov 8, 1:15*pm, "Dave" wrote:
"Art Unwin" wrote in message

...

Hate to tell you but I did tell you so, many, many times. Eat some
humble pie!

not me. *my antennas are big and high in the sky where they belong, not
packed in a shoebox. *just scanning 25 years worth of contest certificates
that prove my big straight planar antennas do work.

Nothing wrong with that David the maximum boom length I got to was 80
feet and 13 elements
but then had to back off to 60feet but they surely worked good but
now
I have got to old to handle the work required to maintain them.
I was very surprized to hear you say that you were wired like Richard
so don't ventue in Illinois!
By the way did you get your four square antenna sorted out and is it
working to your expectations?
With respect to antenna height I have a feeling that height is not a
question of wavelengths but a question of
capacitive coupling to ground. I put the top band antenna up
temporarily at a height of thirty feet and the
the impedance settled on 50 ohms. I am now winterizing it so it gets
thru the winter. It consists of just one element
and a dish reflector but it will have to wait until next year before I
feed it at the dish end, in the mean time it will just be fed at the
centre
I still hope for directionality even tho the rotor is at 30 feet but
either way it will be interesting unless I move on to another project.
I had to move away from the shoebox size of antenna, what I found out
was it worked quite well for receiving but for transmit the eddy
currents opposed each other thus preventing particle elevation so the
volume is now double what it was but still small enough for the rotor
to turn the top band form and light enough to easily put it on the
tower
Regards
Art

On Nov 8, 2:41*pm, Art Unwin wrote:

I still hope for directionality even tho the rotor is at 30 feet but
either way it will be interesting unless I move on to another project.

I'm sure it will be directive to some degree. But except for receive,
what good will that do you if you are 20db-30db down from a dipole
due to the excessive inductive losses?
I liken your setup to using a MW receiving loopstick as a transmit
antenna.. :/ Not a whole heck of a lot of difference except yours
is now a massive four shoe boxes in size. Mercy..
It's still puny considering the frequency.
My MW receiving loop in this room is bigger than that.
"A diamond 44 inches by 44 inches.
And my MW loop would almost certainly outdo your design
being as it is bigger and uses less turns of coil. "5"
It's still a dummy load on a rotating stick... :/

I had to move away from the shoebox size of antenna, what I found out
was it worked quite well for receiving but for transmit the eddy
currents opposed each other thus preventing particle elevation so the
volume is now double what it was but still small enough for the rotor
to turn the top band form and light enough to easily put it on the
tower

So we have validation that your first antenna was a dud when used
for transmitting! I'll alert the SPCA!
But I'm afraid doubling the size of your dummy load on a stick is
not going to pan out in the manner you would like.
Even four shoe boxes worth of wound wire maketh not a good 160m
antenna.
Reboot and try again.