EEVblog Electronics Community Forum

Electronics => RF, Microwave, Ham Radio => Topic started by: Charlie86 on August 05, 2018, 03:08:01 pm

Title: 2x RTL SDR one antenna
Post by: Charlie86 on August 05, 2018, 03:08:01 pm

Hi,

I want to listen trunked signals (DMR) with two SDR USB keys. Can I use one antenna for both of them?

If yes, what splitter should I buy?

I found this one at home and have no idea from where it is an if it capable of splitting antenna signal to two SDR key?

https://ibb.co/fxvake

Title: Re: 2x RTL SDR one antenna
Post by: wolferl1210 on August 07, 2018, 11:50:33 am

The device you show in the picture is a TV attenuator. Has one in and and one out with -0.8db and one out with -12.5db (!)
it is using F-connectors and who knows, for what frequency range it will work.

http://www.dxing.info/equipment/rolling_your_own_bryant.dx (http://www.dxing.info/equipment/rolling_your_own_bryant.dx)
http://www.hdtvprimer.com/antennas/merging.html (http://www.hdtvprimer.com/antennas/merging.html) are examples - how to.

I am using a Mini-Circuits PSC-2-1 for my secondary antenna input on a Kenwood transceiver.
Any splitter will degrade your signals by -3db. Sometimes simply connecting both SDR on one
antenna with an Y-BNC connector will do it without any problems (and loss). Just try it!

73's