Topband: Low Dipoles

[Fred Moeves]

Billy,

I was a little off on my guesstimate the K9AY loop center is 138' from 
the center of my inverted L.
It is however about 40' from my north Beverage.
When testing my K9AY I can see many instances where I can tune in one 
station switch directions and tune in a completely different MW station.
I don't see this much when talking about amateur stations.

I mostly see about 3 to 6 s-units switching away from a station.
But sometimes it is much greater...I'm sure this has something to do 
with the angle of the signal received.
It is almost never better then my north 300' Beverage.

I used the loop in one of the RTTY contests this year on 40m and it made 
a world of difference in receive from Eu stations...this day anyway..
This morning on 40m it was not very good on the Australian stations and 
the West short Beverage was better.
Beverage output is stronger then the loop output so maybe a preamp would 
level the field??

As has been said it's good to have several antennas to switch between.

I did one north Beverage 580' this summer but it was bent.
I just started to use/test it and something chewed up the RG-6 I 
replaced it twice then gave up.(photos below)
There's some sort of coax eating monster that lives in the woods behind 
my house.

I didn't have much time using this bent Beverage but it didn't look to 
good ...to much of a bend I think.
https://www.riverbendphotos.com/UnlistedGalleries/Web-Photos/n-mMvp3/i-8CDRqq7/A
https://www.riverbendphotos.com/UnlistedGalleries/Web-Photos/n-mMvp3/i-bvKTBWQ/A

I'm not that surprised that Rodger's Dipole does so well.
I'm more surprised when I hear that some stations are receiving on the 
inverted L.
Here in my location it's very noisy listening on my inv L is a waste of 
time.

I can tell when one neighbor is on his treadmill and when the other is 
doing the laundry...Crazy..
My XYL will poke her head in the radio room and say "I'm going out to 
see the kids I'll be back later" then heads to the laundry room and 
turns on the our Washer...

To me any rx antenna is worth a try...maybe any antenna is worth a try??

73
Fred KB4QZH
On 12/18/2020 10:40 PM, Billy Cox wrote:
> Thank You Fred!
>
> Do you still "see" the expected pattern and
> any F/S-F/B there when switching directions?
>
> MC es HNY!
>
> Billy, AA4NU
>
>> On 12/18/2020 3:30 PM fmoeves <fmoeves at twc.com> wrote:
>>
>>   
>> BillyI would guess it's about 50' - 60'.I will measure it when I get a chance. Most of my antennas are to close to each other on a on a slope. You work with what you have. 73 Fred KB4QZH
>> -------- Original message --------From: Billy Cox <aa4nu at comcast.net> Date: 12/18/20  2:46 PM  (GMT-05:00) To: Fred Moeves <fmoeves at twc.com> Subject: Re: Topband: Low Dipoles Good Afternoon Fred,Might I ask how close your K9AY loop is to your Inverted L please?Pondering if it is worth doing here, as the spacing will be close.TU!Merry Christmas and Happy New Year,Billy, AA4NU> On 12/18/2020 12:57 PM Fred Moeves <fmoeves at twc.com> wrote:> I really didn't see a big improvement until I went to a inverted L > over a good number of radials.> And the addition of receive antennas.> K9AY loop and Beverages even short Beverages work.
>> _________________
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