transmitting close to sdr play

General discussions
w5ytt
Posts: 2
Joined: Sun Oct 25, 2015 2:41 am

transmitting close to sdr play

Postby w5ytt » Sun Dec 20, 2015 10:46 pm

is there any easy way to protect the sdrplay when i transmit on the same property and frequency on different antenns
Last edited by w5ytt on Thu Jan 01, 1970 12:00 am, edited 0 times in total.
Reason: No reason

dsalomon
Posts: 51
Joined: Sat Oct 10, 2015 1:50 pm

Re: transmitting close to sdr play

Postby dsalomon » Wed Dec 23, 2015 3:47 pm

There are several things you can do.

Disconnect the coax before each transmit, but that's a lot of trouble.

You can home brew a switch, assuming your transceiver has an amp interface (transceiver amplifier keying line). That same interface can be used to build a circuit that will switch the receive antenna to ground. There are also lots of these types of interfaces available commercially.

Doing a google search on "front end receiver protection" will return a lot of home brew and commercial solutions. Most of the home brew solutions are easy to build and use very few, inexpensive parts. If you prefer to buy a solution, DX Engineering sells this: http://www.dxengineering.com/parts/dxe-rg-5000 or this: http://www.dxengineering.com/parts/dxe-rg5000hd. It's an RF limiter that stays inline full time and limits the signal to a safe level. Looking at their website, I can't really tell the difference between the two units, other than $10 more for the "HD" one. Note that the website says the units cover 150KHz to 150MHz. Array Solutions also sells one: https://www.arraysolutions.com/Products/as_rxfep.htm (same frequency coverage).

My suggestion - home brew a switch. It's easy and inexpensive and there are lots of places to find plans / circuits.
Last edited by dsalomon on Thu Jan 01, 1970 12:00 am, edited 0 times in total.
Reason: No reason


Return to “General”

Who is online

Users browsing this forum: Bing [Bot] and 5 guests