[ICOM] Re: ICOM 706MKIIG CW Note and Hearing two signals..

[David J. Ring, Jr.]

I don't know what filters you have in your radio, but if you're using less 
than aproximately 1.2 kHz filter, then you will hear the CW station at 1 kHz 
above "zero beat" and as you continue to tune lower, you will hear it again 
at 1 kHz below "zero beat".  In other words, the filter is wide enough to 
pass the passband of r.f. above and below the signal.  With 500 Hz 
filtering, this won't happen.

If you're using SSB say 2.8 kHz wide you can receive a CW signal and tune 
the VFO through it (zero tone) and go out the other side and the tone will 
start rising on the other side and you can produce the same audio note at 
two different VFO settings.  With narrower filtering this can't happen.

73

David N1EA

----- Original Message ----- 
From: "Bert Morton" <hamradioguy at vermontel.net>
To: "icom-all" <icom-all at yahoogroups.com>; <ICOM706 at yahoogroups.com>; 
<icom at mailman.qth.net>; <IC-706MKIIG at yahoogroups.com>; 
<IC-706Mk2G at yahoogroups.com>; <ic706 at yahoogroups.com>
Sent: Wednesday, January 04, 2006 9:51 AM
Subject: [ICOM] Re: ICOM 706MKIIG CW Note and Hearing two signals..


Added info ****

I am also noticing that I am hearing the same CW station about 1 kHz.
apart..

This morning I answered a CQ on 7038 and the station didn't answer. I then
heard him calling CQ on 7039 and I called him and he responded. Further
investigation revealed all CW signals were duplicated 1 KHz. apart.

Sounds like my rig is will probably be headed out to Scott Malcolm soon(-:

Any thoughts anyone?



----- Original Message ----- 
From: "Bert Morton" <hamradioguy at vermontel.net>
To: "icom-all" <icom-all at yahoogroups.com>; <ICOM706 at yahoogroups.com>;
<icom at mailman.qth.net>; <IC-706MKIIG at yahoogroups.com>;
<IC-706Mk2G at yahoogroups.com>; <ic706 at yahoogroups.com>
Sent: Tuesday, January 03, 2006 9:35 PM
Subject: ICOM 706MKIIG CW Note


>I am suddenly getting reports that my ICOM 706MKIIG is producing a "mushy"
>CW  note almost to the point of a chirp.
>
> Anyone have any experience with this, I have eliminated the power supply
> as the culprit by swapping out another 706MKIIG.
>
> Thanks and 73,
>
> Bert W1DFU

----
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