A couple of us in the radio club were discussing the possibility of
installing a full wave horizontal loop antenna (for Rx and Tx) on top of a
building we have access to. The loop would be about 20ft above the building
roof, making it about 100ft above ground. The loop could be a rectangle
approx.
Hi Tim
I also agree with the previous comments on this thread about detuning the
transmit antenna (or any other wires/cables that are resonant on 160M) and
isolating the coax feed line from the RX loop.
It is also important to identify the direction of the main source of the
noise and orientat
My 160 inverted-L support rope broke, Bill. And there are other issues.
(Long story.)
When I am able to put it back up, it will absolutely have Guy's FCP instead
of the two elevated radials like I had before.
All I have right now is a 97' dipole (yes, it does not work on 160) and
580' bi-dir Beve
On Sat, 2012-06-16 at 16:09 -0500, Mike Waters wrote:
> Well, I plan on trying to enjoy the contest a little, even though all I can
> do today is listen. :-)
>
> 73, Mike
> www.w0btu.com
Hi Mike,
Listening is a large part of ham radio. I do a lot more receiving than
transmitting. I am left to
Well, I plan on trying to enjoy the contest a little, even though all I can
do today is listen. :-)
73, Mike
www.w0btu.com
On Sat, Jun 16, 2012 at 3:42 PM, Bill Cromwell wrote:
> ... The votes are in. Wait until dark. ... I will give QRP a try but I
> expect to crank in all 35 watts output. Un
On Sat, 2012-06-16 at 14:49 -0500, Mike Waters wrote:
> All I hear is distant lightning QRN. But good things come to all who
> patiently wait for sunset and the ensuing darkness. :-)
>
> 73, Mike
> www.w0btu.com
>
> On Sat, Jun 16, 2012 at 11:39 AM, Bill Cromwell wrote:
>
> > So far all I am rec
All I hear is distant lightning QRN. But good things come to all who
patiently wait for sunset and the ensuing darkness. :-)
73, Mike
www.w0btu.com
On Sat, Jun 16, 2012 at 11:39 AM, Bill Cromwell wrote:
> So far all I am receiving is noise.
>
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UR RS
Tim
"Trying to figure out what "detune" is"
Excellent question. The ground is the most important part of the T antenna,
without the ground the antenna became a 1/4 element isolated from ground
and wont irradiate. In order to accomplish that you need two fast vacuum
relay to open the ladder line
OK, several folks came back and recommended detuning my transmit antenna in
receive.
Certainly any receive antenna I have is going to be in the shadow of my
transmit antenna, a 130-foot flat-top about 85 feet up, fed against ground.
(Really it's an 80 meter doublet fed with ladder line. I tie t
Hi,
So far all I am receiving is noise. Not overwhelming, overpowering
noise. Noise to let me know my antenna is connected. I'll look at the
band again later. Maybe I'll have to wait for that grey line thing and
darkness.
73,
Bill KU8H
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UR RST IS
oops, did I forget to mention my S-9 24/7 noise floor, my bad
--
GB & 73
K5OAI
Sam Morgan
On 6/16/2012 9:46 AM, Sam Morgan wrote:
> you want to talk alligators
> try a 7' tall vertical @ 20' as your only TX/RX antenna
> and a bottom floor apartment, where I might try a 6' loop
> if I can build it
you want to talk alligators
try a 7' tall vertical @ 20' as your only TX/RX antenna
and a bottom floor apartment, where I might try a 6' loop
if I can build it in the next few hours, hi hi
gud luck Tim
GB & 73
K5OAI
Sam Morgan
On 6/16/2012 8:28 AM, Shoppa, Tim wrote:
> I want to try a new receivi
when I am looking at the whole US on the http://www.strikestarus.com/ site
all I look at is the different colored + signs
those are the actual strikes
and their color codes are in the upper right hand corner of the map
closer to white you get, the worse it gets
just for this question: 'where are t
Tim -- If the suggestions from others don't entirely do the trick, here's
another thing to consider: The outer conductor on your coax might be picking
up local noise and/or destroying the pattern of your receiving antenna. I DX
the AM broadcast band with whatever antennas I can fit into my su
Most people do not have room for beverages... I have tried all of the
compromise antennas for 160 including Ewe's, K9AY, short beverages, low
dipoles, etc. To me it was an exercise in futility...
Go with the Hi-Z antennas. They are stellar... Triangle, 4-square or
8-circle..You cannot lose! The
I will second Bruce's comments. Re-radiated noise is almost exactly what you
are describing.
I started using terminated loops around 2000 and even though everyone said that
the transmit antennas needed to be detuned when receiving, I was stubborn and
didn't follow the advice immediately. The
Tim: I laid down a Dipole On Ground (DOG antenna) - it ended up at just right
at 150' (two 75' sections) as indicated by an MFJ-259 analyzer I used that says
it's spot on at 1.2:1! Compared to my 43' vertical, noise levels are down at
least 2 S units - something to consider, when space is limit
Tim,
Your receiving antennas may be picking up re-radiation, of noise and
signals, from the transmitting antenna. Try detuning the TX antenna while
receiving. (If best receiving on the loop is with the null toward the TX
antenna, it is a indication.)
73
Bruce-K1FZ
I have tried pennants and
Why don't you try a 150' BOG? I know a guy in Maryland who has one only
140' long, and he hears DX on it on 160 that he doesn't on his inverted-L.
Probably better than a BOG is a Slinky Beverage.
73, Mike
http://www.w0btu.com/Beverage_antennas.html
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That site looks interesting, but all the little colored hollow squares
scattered all over the map confused me. I thought they were lightning
strikes, but from what I can tell, they are simply the locations of
different types of sensors. I wish there was a way to disable their display
and show only
I want to try a new receiving antenna for the summer Stew Perry. Last winter
was my first foray onto 160M and I really felt like an alligator. I could work
everyone I could hear, with just 100W. I think that means I need a better
receive antenna. If you look at my score in the winter Stew Perry
Thank you to all those that responded to my query. I am very glad that it is
as it means another country!!
73" Allan W2TN
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UR RST IS ... ... ..9 QSB QSB - hw? BK
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