Thursday, 9 February 2017

RX antenna isolator

I homebrewed and tested the G3BJ RX antenna isolator  last weekend. Implemented as M0VKY


G3BJ RX antenna isolator 

The half size K9AY RX antenna is close to my TX doublet [about 5m]. There does not seem to be much power coupled into the RX antenna when I transmit with 100W on 40m. I measured the DC rectified voltage on a dummy load connected to the RX line at approx 300mV.

Testing RX antenna isolator with 817 and a dummy load connected to TX.

The Aluminium boxes by Bitbox are inexpensive and easy to work with. I might box in them some of my other kits [BBGen,...]

Many thanks to Don G3BJ and Simon M0VKY for sharing this.


73 Angel
M0HDF

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