Thread: A/B Switching
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Old July 19th 06, 04:54 PM posted to rec.radio.amateur.antenna
Tam/WB2TT Tam/WB2TT is offline
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First recorded activity by RadioBanter: Jul 2006
Posts: 125
Default A/B Switching


"Win" wrote in message
...
I recently put an A/B switch between my FT-1000 MPV and my IC-746 to
make comparisons between receivers. I would now like to leave this
A/B switch in line, as I would like to use one radio for CW, and the
other for SSB. The IC-746 is known for having a sensitive front end
(easy to damage). I am running 200 watts from the FT-1K. The A/B
switch grounds the unused port. My fear is that the FT-1K will damage
the front end of the IC-746, even as the IC-746 port is grounded.

I have to assume, no matter how diligent I think I will be, at some
point in time, both receivers will be on the same band, near the same
frequency.

Is it probable that the grounded loop to the 746, being 1/8 inch from
200 watts, will survive without damage?

Has anyone operated an IC-746 under these conditions?

Win, W0LZ


I have an IC756 and FT847 going to the same (HF) A/B switch. No problems.
You will want to do this on the input side of any amplifier.

Tam/WB2TT