SDR PLAY 2 Front End Protection?

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Joined: Sun Nov 15, 2015 2:07 am

SDR PLAY 2 Front End Protection?

Postby dosformat » Mon Oct 02, 2017 9:41 pm

Hi all

I have recently purchased a SDRPLAY Pro 2 a few weeks ago and would like some advice if that is OK.

I am a radio ham and transmit quite a bit on HF & VHF.

Now I have always disconnected the antenna from my sdrplay 1 and currently sdr play 2 when I transmit but it is getting a bit of a pain.

Now I know a high amount of RF will kill the device but I am wondering is that only when it is receiving (so for example I am listening to a signal on the waterfall)

Will it still be damaged if the coax is connected to the sdr play, usb connected to the computer but no program running decoding anything?

Is it safe to transmit like that or is it best to either just unplug the aerial or unplug the USB lead from the device?

Any way of having to save me unplugging my westflex 103 coax which is a pain to do at the best of time will save me a lot of time and trouble as westflex is a brittle cable and easy to snap.



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Posts: 11
Joined: Sat Jul 01, 2017 11:43 pm

Re: SDR PLAY 2 Front End Protection?

Postby vk3alb » Thu Oct 05, 2017 9:43 am

There have been a number of discussions about RX isolation such as viewtopic.php?t=1158

Bottom line, you need to keep the signal to 0dBm or less at the RSP input and the best way to do that is with an isolating relay or as you are already doing, disconnecting the cable.

Hook up with a local ham that has the gear to do the measurement with you. It's an interesting experiment.

Personally, I would not worry about the software running or not. A relay connected to your PTT that isolates your RSP is cheap insurance.

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