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 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

Re: Topband: Post contest season: TX antenna vs RXantenna cros-stalk. What do you do?

Good point. On 160 there was also a relatively nearby 829KHz AM BC station. The RDX PI4YLC Field-Day-style station used an OM-Power 6 BPF in its TX path. But no additional BPF or AM BCB HP filter in the RX path. A mistake I should have recognized. Thanks for the test procedure. Will use that

Re: Topband: Post contest season: TX antenna vs RX antennacros-stalk. What do you do?

Hi Kees, That is what I successfully do at home, because my 160m vertical re-radiates to my RX antennes. But at the recent RDXC PI4YLC FD contest station both the 40 and 80m full-size deltaloops were not detuned or switched to GND or anything. The YL ops wanted to be able to listen to them

Re: Topband: Post contest season: TX antenna vs RXantenna cros-stalk. What do you do?

Hi Terry, I have no access to the K3's as they belong to someone else. But I learned there is no such thing as total isolation. Not even with the Frond end savers, unless they incorporate several relays in series. But I did check my TT ORION using the Elecraft XG3 generator; isolation is

Re: Topband: Post contest season: TX antenna vs RX antenna cros-stalk. What do you do?

>>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

Re: Topband: Post contest season: TX antenna vs RX antenna cros-stalk. What do you do?

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

Re: Topband: Post contest season: TX antenna vs RX antenna cros-stalk. What do you do?

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

Re: Topband: Post contest season: TX antenna vs RX antenna cros-stalk. What do you do?

Hi Bill, I think this is not what I meant here; I also do use BPF's and the Front End Savers. 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. I