CW and high potential of RF on the RX port

AK1MD
Posts: 13
Joined: Sat Apr 08, 2023 6:44 am

CW and high potential of RF on the RX port

Postby AK1MD » Sat Nov 11, 2023 5:09 am

Just read the warning about CW and different antenna ports
configurations for RX and TX and high potential for RF on the RX port.
In Thetis settings I am using the same antennas for RX and TX. However I have RX
antennas coming in on the ADC2 port on the Anan, which is RX2. On that
coax that feeds my RX antennas into ADC2 I have a Rx band pass filter, however that protects the Anan only from RF coming from outside. The BPF goes to ground when transmiting with the Anan but RF out of the RX2 antenna would damage the BPF.
I would like clarification if somebody could please answer, is it really possible and under specifially what conditions, could one have RF coming from the RX2=ADC2 when transmitting. I have a SAL on the RX2 port and it would be damaged with any transmit RF entering the relay and preamplifier box at the antenna.
In addition could anybody please clarify, is the RX2 port protected when transmitting/going to ground, while transmitting witht the Anan?
Thank you for your clarification.
73, Alex AK1MD
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w-u-2-o
Posts: 5579
Joined: Fri Mar 10, 2017 1:47 pm

Re: CW and high potential of RF on the RX port

Postby w-u-2-o » Sat Nov 11, 2023 11:46 am

This problem does not affect the ADC2/RX2 or EXT ports. Only the three ANT ports.
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pa1hr
Posts: 46
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Location: Pixendorf, Austria
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Re: CW and high potential of RF on the RX port

Postby pa1hr » Sat Nov 11, 2023 3:21 pm

Hello Alex,

RX2 port is not involved. You don't have to worry about that.

I have two active RX loop antennas; one on ANT2 and one on ANT3, however I don't use the CWX Form and/or Serial CW/PTT. All my sensitive RX antennas survived...

On 6m XVTR I use a transverter for QO-100.

73, Hans PA0Q.


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73,
Hans Remeeus (PA0Q/OE3JRC)
https://pa0q.nl
"Communication is about people, the rest is technology"

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