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Old November 9th 08, 06:02 AM posted to rec.radio.amateur.antenna
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First recorded activity by RadioBanter: Jul 2006
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Default "Unwashed" hams and "washed" hams

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.







 
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