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Author Topic: using an ic-751a as second receiver  (Read 588 times)
W3SML
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Posts: 23




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« on: June 30, 2008, 11:23:08 AM »

Greetings.  I am adding an old ic-751a to my shack.  I would like to use it as a second receiver to my ft-920, but with full transmit capabilities when I get the whim.  I would like ideas on how to mute the 751a reciever when I transmit with the ft-920 and vice-versa.  Thanks, Shannon.
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WB2WIK
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Posts: 20542




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« Reply #1 on: June 30, 2008, 01:05:11 PM »

Are you going to use completely independent antenna systems on the two rigs, so you can just transmit on either one any time you wish?

If so, then "muting" probably really is all you need to accomplish.

If not, then you need a lot more than muting!  
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WW5AA
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Posts: 2088




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« Reply #2 on: June 30, 2008, 02:11:48 PM »

In most cases you will need a relay to isolate one radio RX while the other radio is TXing. Muting will not work. Without isolation you stand a chance of losing the front end of the RX radio. What you want to do is very complicated (at least for me). It took a bit of effort to get it right on my Pro-III and 751A because I use RX antennas at the RX antenna connecters of both radios. Be careful! Good luck.

73 de Lindy
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N9DG
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Posts: 308




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« Reply #3 on: June 30, 2008, 05:03:52 PM »

One possible starting point is to get one of the SO2R controller boxes that many HF contesters use.
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KI4FZY
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Posts: 28




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« Reply #4 on: August 25, 2008, 01:20:09 PM »

Hi Shannon,

Look forward to hearing you on the Mennonite Net again soon!

73s,
James NN4JM
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