> This is not encouraging news for those of us with towers already ground
> and are either shunt fed or cage fed.
Shunt fed towers can be detuned, or taken out of the picture by phasing a
small sample of signals into the RX antenna.
> I could try a motor driven inductor or capacitor (small) jus
Great idea Pete but I also may run head long into false positive
results with so many Beverages (12) and each with a different possible
indications. Here with the masking over of any subtle changes by
strong ever present boiling tropical QRN yielding a possible infinite
number of variables,
If one's tower does not have radials, is set in concrete, with minimal
direct contact with earth (say less than a linear foot, with nothing more
than the usual lightning treatment attached to the base, then the base
connection is likely rather resistive RF, and strictly by itself the tower
is a fai
Doesn't this suggest that there is a role here for cut and try? Take a
set of clip leads to the base of the tower and experiment?
73, Pete N4ZR
The World Contest Station Database, at www.conteststations.com
The Reverse Beacon Network at http://reversebeacon.net, blog at
reversebeacon.blogspot.c
Tom,
This is not encouraging news for those of us with towers already ground
and are either shunt fed or cage fed. Even though they are not
resonate, although top loaded and approaching resonance, it seems that
even with some elaborate decoupling arrangements, and I hope I am wrong,
not to m
get too much
> signal into the front end of the rig (K3).
>
> Just let the DX know you are in NM and they will come calling :) I grew
> up in Hobbs, NM and it worked.
>
> 73, Mike
>
> From: Jim Koshmider
> Sent: Monday, June 18, 2012 12:09 PM
> To: mikefur...@a
are in NM and they will come calling :) I grew up in
Hobbs, NM and it worked.
73, Mike
From: Jim Koshmider
Sent: Monday, June 18, 2012 12:09 PM
To: mikefur...@att.net
Subject: Re: Topband: TX ANT TO RX ANT COUPLING
Outstanding job, Mike...!
It's encouraging to hear about
WA5POK
-Original Message-
From: W2PM
Sent: Monday, June 18, 2012 5:50 AM
To: Bill and Liz
Cc:
Subject: Re: Topband: TX ANT TO RX ANT COUPLING
Do you have much noise in the first place to reradiate? Line noise also is
very spotty along a power line - along the same line of wires any nasty
a
Do you have much noise in the first place to reradiate? Line noise also is very
spotty along a power line - along the same line of wires any nasty arcing noise
can be very strong or very weak at certain spots so the noise level - if you
have noise - may not be strong enough to reradiate with any
Hi Bill
The resonance element reradiate noise and also the signal. If you think
about why a yagi works, all elements reradiate the signal from the driven
elements, but what about on reception, . It is the same. All resonate
elements reradiate. Any resonant structure does the same.
Here detuning t
Sounds like a 1/4 wave vertical to me if its toploaded enough to resonate.
Do the radials pass over or under the Beverage?
Carl
KM1H
Carl
KM1H
- Original Message -
From: "W2XJ"
To:
Sent: Sunday, June 17, 2012 5:53 PM
Subject: Re: Topband: TX ANT TO RX ANT COUPLING
>
Probably part has to do with the fact that your vertical is 1/8
wavelength and rule of thumb is 1/8 wavelength or less do no have a
significant influence unless extremely close.
On 6/17/12 5:34 PM, Bill and Liz wrote:
> I have been following the thread with interest. I have a K9AY and a DO loop
I have been following the thread with interest. I have a K9AY and a DO loop
located within 60 to 75 ft of the TX vertical at our summer home.
Interestingly, I find both these antennas very quiet with no sign of noise
being coupled to them via the TX antenna. I work a lot of DX from this
locat
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