On Sat,3/26/2016 3:49 AM, Mark van Wijk, PA5MW wrote:
Our fixed setups usually had harmonic coax stub filters per
individual antenna.
You may find my applications note on optimizing the location of harmonic
stubs useful. It's on my website. k9yc.com/publish.htm Using the
technique I've desc
e tips
73 Mark, PA5MW
-Original Message-
From: Jim Brown
Sent: Thursday, March 24, 2016 6:11 PM
To: topband@contesting.com
Subject: Re: Topband: Post contest season: TX antenna vs RX antenna
cros-stalk. What do you do?
On Wed,3/23/2016 11:38 PM, Mark van Wijk, PA5MW wrote:
The proble
On Wed,3/23/2016 11:38 PM, Mark van Wijk, PA5MW wrote:
The problem is that while listening to your receiving antennas, there
is also some signal from the transmit antenna getting through thanks
to the internal cross-talk of your rig's TX/RX relay.
There are many heads to this snake, but also
>>I was wondering what people do besides the obvious 'kill the TX antenna
input during RX mode' ?<<
There are several reasons why it is necessary to detune the TX antenna
during RX, however disconnecting the center of the TX coax during RX on 160m
is a MUST.
If you don't understand the problem y
I am using 2xTS590 and never had any issues either.
73s Filipe
CT1ILT CR6K
Sent from my Huawei Mate 8
Em 24/03/2016 12:05 p.m., "Terry Posey" escreveu:
> Hi Mark -
>
> I have not experienced K3 TX/RX antenna isolation problems with my station
> configuration. I expect that if there is an isola
Hi Mark -
I have not experienced K3 TX/RX antenna isolation problems with my station
configuration. I expect that if there is an isolation problem with your
rig's TX and external RX antenna routing/switching, that problem would be
nearly impossible to quantify using your station's TX and RX anten
relay.
I was wondering what people do besides the obvious 'kill the TX antenna
input during RX mode' ?
73 Mark, PA5MW
-Original Message-
From: william radice
Sent: Tuesday, March 22, 2016 2:05 PM
To: topband@contesting.com
Subject: Re: Topband: Post contest season: TX a
Serious multi-op contest stations face this issue all the time.
Most use individual band filters and they almost completely eliminate
the issue.
At our station we used the Dunestar filters for operating positions on
different bands. As for 160 I personally use the KD9SV "front end saver"
a
Now that we are 'sort of in post contest season mode' and sharing some good
ideas, there is another question:
During recent Field-day setups I noticed severe cross-talk issues between TX
antennas and the separate RX antenna circuits.
For sure any TX/R relay circuitry offers roughly 50-65 dB dampe