Regarding RX antennas. Rather than have separate RX antennas I went with
low noise location. Thus, TX antenna is used both RX and TX 100% of the
time.
Obviously this is not possible for many but it can be done.
73
Bob, W7RH
--
W7RH DM35os
"It has become appallingly obvious that our
Thanks, Guy for clarifying the re-radiation issue. I had thoughts of the other
way around as well, ie, the inverted L (or other tuned antenna) affecting the
rx antennas. Breaking the dual band L somewhere to negate this effect might be
more important. To that end I thought of simply switching
On 7/25/2019 11:55 AM, Brian Campbell wrote:
You can put me in that group as well. Here are just two recent examples.
I'm with you both, never rule out your vertical!
During one ARRL 160 contest a few years ago, conditions were such that I
used my inverted-L over 90% of the time *even
QTH is different so YMMV...
73,
Brian
VE3MGY
From: Topband on behalf of Mike Waters
Sent: July 25, 2019 2:16 PM
To: g...@ka1j.com
Cc: topband
Subject: Re: Topband: RFI on TB
I'm with you both, never rule out your vertical!
During one ARRL 160 contest a few
I'm with you both, never rule out your vertical!
During one ARRL 160 contest a few years ago, conditions were such that I
used my inverted-L over 90% of the time *even though I had two 580'
switchable-direction Beverages*. Signals at my central USA location were
coming in from all directions.
I agree with Ed, never rule it out. Me, I
tried beverages over my available space
(Salt marsh with phragmites everywhere)
and they were more than worthless in this
specific location. I think between the
proximity to salt water and the dry leaves
making static, the beverages were much
louder
I use beverage "almost" all the time for receive on 160M. However, there
are times, clearly a minority, when listening on my phased array of 2
verticals is better. When conditions are super quiet in the winter and
signals are weak from a very distant station. Don't rule out your Transmit
ask your other local DXers.
73
Bruce K1FZ
-From: "WW3S"
To: "FZ Bruce"
Cc: "Mark K3MSB", "Rob Atkinson", "CUTTER DAVID", "TopBand List", "Guy
Olinger K2AV"
Sent: Thursday July
.com/vhc3-12v.html [1]
>
> 73Bruce-k1fz
>
>-From: "Mark K3MSB"
> To: "CUTTER DAVID"
> Cc: "Rob Atkinson", "TopBand List", "Guy Olinger K2AV"
> Sent: Thursday July 25 2019 7:59:32AM
> Subjec
Hi Mark,
Response to David farther down.
Short answer: Just one relay, really.
Long answer:
There is a lot of misinformation about FCP's floating around out there,
essentially because most don't know anything at all about FCP's and a
certain few of those keep talking anyway. I don't have a
Mark,
Are you ready to take the red pill or the blue pill?
If you take the red, be prepared to spend endless time and money, and the
experts on this list will help guide you down the 160m rx rabbit hole.
I was where you were a few years ago... then I started with a k9ay loop, slinky
>This has got to be on a case-by case basis. I don't have any listening
>antennas, so i listen on my transmit vertical. It works fine. For me. Most
>of the time. Would I hear more stuff with listening antennas? I bet the
>answer is yes under certain conditions.
Yes under certain
dvertising error.
https://www.rfparts.com/vhc3-12v.html [1]
73Bruce-k1fz
-From: "Mark K3MSB"
To: "CUTTER DAVID"
Cc: "Rob Atkinson", "TopBand List", "Guy Olinger K2AV"
Sent: Thursday July 25 2019
I’d be interested in hear about this also. I’ve always used ground
radials for my INV-L but this year I’d like to try an FCP.
I’ve read that the INV-L as well as the FCP need to be floated during
receive, which means two relays at the INV-L.
73 Mark K3MSB
On Thu, Jul 25, 2019, 4:11 AM
Guy
Slightly OT, but how do you deal with re-radiation from your inverted L?
I'm about to erect one of your inverted L on FCP and my rx loops are about 50m
away in the other corner of the field. Is that far enough?
David G3UNA/G6CP
> On 24 July 2019 at 07:13 Guy Olinger K2AV wrote:
>
>
> I
This has got to be on a case-by case basis. I don't have any listening
antennas, so i listen on my transmit vertical. It works fine. For me.
Most of the time.
Would I hear more stuff with listening antennas? I bet the answer is
yes under certain conditions.
73 - Mark N5OT
On
I gotta agree with Rob. An inverted L aerial wire will hear ALL the noise
that is around. Mine sure does. RX antenna will help enormously if there is
a place to put one that does not get the noise second hand off the L. Not
enough room? A bit complicated, but "repeated" noise off the L can be
Rumor has it PG is facing possible bankruptcy due to being
found responsible for the big fire(s) in CA. That being the
case, I would expect they would have to re-prioritize greatly-
problems such as yours are, to them, 'lost in their noise'
(pun intended).
73, David K3KY
(You wrote:)
I want
t;
>
> Ken K6MR
>
>
>
>
> From: Topband on behalf of K4SAV <
> radi...@charter.net>
> Sent: Tuesday, July 23, 2019 8:43:56 AM
> To: topband@contesting.com
> Subject: Re: Topband: RFI on TB
>
>
> Don't know why the mail system thinks this message is spam...
:56 AM
To: topband@contesting.com
Subject: Re: Topband: RFI on TB
Don't know why the mail system thinks this message is spam... Trying again.
Lightning surge suppressor on power poles can be big noise generators
when they go bad. The worst one I found was three miles from my house
and created S9
Don't know why the mail system thinks this message is spam... Trying again.
Lightning surge suppressor on power poles can be big noise generators
when they go bad. The worst one I found was three miles from my house
and created S9 noise on my receiving array. Its characteristics fooled
me
> Over past few months, I have picked up an S5-S7 noise signature on my TB inv
> L antenna with K2AV FCP system.
I would not use an inverted L for receiving. Unusable for rx at my
QTH but FB for transmitting.
73
Rob
K5UJ
_
Searchable Archives: http://www.contesting.com/_topband
I can relate the same story here. The power company guy came by, I
showed him what direction it was coming from, he went to the nearest
pole with a lightning arrestor in that direction (a little over a
quarter mile away - not every pole has one) disconnected the lightning
arrestor, and the
Around here, lightning arrestors on these power cables are the prime
candidate. I have exactly the same issue here and every couple years
have to go track down one that has started making racket over the summer
storm season. The noise is in-band and you can't filter it generally
speaking.
On 7/22/2019 3:59 PM, 57jndenn...@comcast.net wrote:
I am uncertain this will cure problem, My TB and yagi coax shields are
showing a noise signature on his analyzer.
This was a shock as both coax cables have commercial bead type choke baluns.
Jim K7EG
I'm not shocked.
Bead type choke
Over past few months, I have picked up an S5-S7 noise signature on my TB inv
L antenna with K2AV FCP system. This configuration has been working
trouble-free for a couple years. Power company sent consultant today who
located a noisy power pole.
I am uncertain this will cure problem, My TB
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