Hello,
I would like to use an SDR at a remote location while transmitting using my shack HF radio. I have figured out most things but the one difficulty I have is how to mute the RX noise in the shack when I TX.
The SDR will be miles away from my home location so no risk of damaging the SDR but I don't want the speaker noise when I TX and I don't want to have to manually mute it every time I transmit.
Can you help at all?
Thanks.
James.
GM0GMN
SDR Mute
Re: SDR Mute
Not reliably without some additional hardware. How is the SDR supposed to know you are transmitting? If your transmitter is louder than anything else received you might get sort of adequate performance with the automute optiion. It mutes the receiver if a signal is too strong.
{^_^}
{^_^}
Re: SDR Mute
Place the SDR at your QTH with a RXR front end protector on a RXR antenna. Then the auto-mute function of SDRC will perform as it should. Or, if you have the property, place your RXR antenna as far away as possible from the TX antenna and skip the protector. RG-6 cable is cheap and makes great RX only antenna feedlines. Even better is RG11. Both are at give-a-way prices on Facebook Marketplace or Craigslist. One of my servers is on a 350' run of RG11, in order to get some distance between my 75m remote base and my condo neighbor's OCF 80-10m FT8 station antenna.
I use the following (now discontinued) at my SDRC Server sites that are co-located with my remote TXR's:
https://www.arraysolutions.com/pdfs/AS- ... asheet.pdf
Having it at your shack spares you of having a remote PC and all the headaches that you get when Windows gives you when updating, CPU or memory usage runaway, or power outage issues.
I use the following (now discontinued) at my SDRC Server sites that are co-located with my remote TXR's:
https://www.arraysolutions.com/pdfs/AS- ... asheet.pdf
Having it at your shack spares you of having a remote PC and all the headaches that you get when Windows gives you when updating, CPU or memory usage runaway, or power outage issues.
73 Kriss KA1GJU Home of the KA1GJU Super Station SDRC Servers in NH, USA (FN42mw, FN43na, and FN42lt)
Re: SDR Mute
Simon, this is something that seems to come up quite a few times. Is it worth adding an option for a hardware mute, most likely via a serial port?GM0GMN wrote: Sat Nov 15, 2025 11:26 am I would like to use an SDR at a remote location while transmitting using my shack HF radio. I have figured out most things but the one difficulty I have is how to mute the RX noise in the shack when I TX.
Max