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Author Topic: Long-time IC-745 owners...step inside, please  (Read 1249 times)
N8YX
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Posts: 989




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« on: August 15, 2017, 06:05:44 AM »

Reviews and comments I've read about the rig state "somewhat noisy synthesizer".

If you've owned or operated one for any length of time: What effects have you observed which would indicate this?

Are there specific modes or bands which exacerbate the condition?

Any other operational quirks you've observed with the radio?
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W0XX
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Posts: 1437




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« Reply #1 on: August 15, 2017, 06:08:15 AM »

Only thing I noted in the 740 and not sure if it carried forward into the 745 was the processor or compression control, since tied in thru the IF path, can obstruct and affect receive.  I can't talk to the 745 but the 740 was known for a goofy processor switch/control affecting receive as well, sometimes muting the receive signals.
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KC9NVP
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Posts: 209




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« Reply #2 on: August 15, 2017, 05:15:19 PM »

I have not notice this issue with my IC-745.
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N8YX
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« Reply #3 on: November 21, 2017, 12:09:07 PM »

Bumping this thread up a bit:

Dragged out my '745, an R-70 and an AT-100 tuner then tied everything together with an IC-EX1 expansion interface. The receiver is fed from the transceiver's ANT Out port via a 50-ohm Mini-Circuits splitter. Sadly, one cannot slave the transceiver to the receiver for purposes of frequency control as is possible with the later 751(A)/R-71 pair.

The thing hears just as good on our local 10M frequency as does any of my pure analog gear. Maybe it's a different story roaming the low bands on contest weekend?
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KA4DPO
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« Reply #4 on: November 24, 2017, 09:16:18 AM »

Only thing I noted in the 740 and not sure if it carried forward into the 745 was the processor or compression control, since tied in thru the IF path, can obstruct and affect receive.  I can't talk to the 745 but the 740 was known for a goofy processor switch/control affecting receive as well, sometimes muting the receive signals.

That's interesting because I own an IC-740, I bought it new from Juns in 1984.  I have never ever noticed the issue that you mentioned with the processor.  Additionally, the IC-740 is a superb CW rig with the Inrad filters installed in both IFs.  Anyway I worked a thousand phone stations on the old IC-740 with the processor on and never had any problems at all.  That might have been an issue if you turned the processor all the way up, but only a dumb a$$ CBer would do that.
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