Hi Jim,
I just use a simple SPST open frame relay to ground the vertical section of the
antenna and no I do not use QSK ... yet ... (need to add it to the old amp)
The vertical section is about 60’ and the rest is horizontal at about 80’ up.
Yes, I have been very pleased with this for this lot. I have thought about the
flag antennas (Waller) and the Hi-Z antennas for rx and will experiment with
that in the future. Oh yes, I have a relay that grounds the feed on the K9AY
loop during transmit as to not 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: mikefurrey@att.net
Subject: Re: Topband: TX ANT TO RX ANT COUPLING
Outstanding job, Mike...!
It's encouraging to hear about your successes. Your results are amazing.
I have a similar situation here, in Albuquerque, and am in the process of
setting up my Inverted L - essentially the same way as yours. I tried a
different configuration, using a shorter vertical component of the "L" (only
about 33 feet tall), but I am convinced that having a taller vertical component
(about 44 feet tall) will give me a better low-angle signal. Since I don't
have the benefit of having tall pines in my yard, the horizontal part of my "L"
will droop down to about 25 feet at the end. Still that's not too much of a
handicap.
About your relay for grounding your transmit antenna... do you use a
vacuum relay? { If you don't use QSK, I suppose a typical latching relay would
work just as well. }
I'm sure glad you commented on this issue. I was beginning to wonder if
I would ever be able to work outside the continental US on 160! (Ha!)
73, and best DX,
Jim, K8OZ
--- On Mon, 6/18/12, mikefurrey@att.net <mikefurrey@att.net> wrote:
From: mikefurrey@att.net <mikefurrey@att.net>
Subject: Re: Topband: TX ANT TO RX ANT COUPLING
To: topband@contesting.com
Date: Monday, June 18, 2012, 8:34 AM
I perhaps have maybe a worst case scenario ... I live on a 60' by 90'
lot in
Houston. Fortunately I have some very nice tall pine trees that support
my
inverted L. It has one elevated radial in the shape of an L about 20'
above
the ground and the antenna is fed through a current balun. One leg of
my
K9AY loop is within 6' of the elevated radial and 40' from the antenna.
Yes,
I get significant noise transferred from the transmit antenna to the
K9AY
loop on receive. As per ON4UN's book, he suggests to ground the TX
antenna
during receive and I set up a relay to do such and as a result, there
is a
significant decrease in the received noise from the loop. The power
line in
my area is underground, underneath and parallel for some distance with
that
radial.
Just what I have managed to do here and have worked 155 countries with
600
W.
73, Mike WA5POK
-----Original Message-----
From: W2PM
Sent: Monday, June 18, 2012 5:50 AM
To: Bill and Liz
Cc: <wlmailhtml:/mc/compose?to=topband@contesting.com>
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
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
affect.
Sent from my iPad
On Jun 17, 2012, at 17:34, "Bill and Liz"
<wlmailhtml:/mc/compose?to=magoo@isp.ca> wrote:
> 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
> location on topband using these loops as well as a pair of Beverages,
both
> of which also pass fairly close to my TX vertical and both of which
are
> very
> quiet.
>
> So, why am I not hearing this noise many are experiencing? The TX
> vertical
> is a 60 ft toploaded affair and I do not de-tune it on receive. All
I
> have
> done is to run all the feedlines for both RX antennas and the TX
vertical
> underground in different conduits to a remote switching location.
Someone
> please tell me why I am missing out on all the fun of having noise on
my
> RX
> antennas.
>
> Bill, VE3CSK
>
>
>
> -----
> No virus found in this message.
> Checked by AVG - www.avg.com
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06/17/12
>
> _______________________________________________
> UR RST IS ... ... ..9 QSB QSB - hw? BK
_______________________________________________
UR RST IS ... ... ..9 QSB QSB - hw? BK
_______________________________________________
UR RST IS ... ... ..9 QSB QSB - hw? BK
_______________________________________________
UR RST IS ... ... ..9 QSB QSB - hw? BK
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