[ICOM] IC-7000 AM Modulation Problem

[Larry Harrison]

Hi Chris,

Thanks for the info.

>I guess that my call sign was spread amongst the AMers as whenever I 
>answered a
> CQ on that frequency I never made a contact.

Chris, there are a lot of hams using rice boxes on AM.  Don't know why you 
would have any problem with AM contacts.
All of my home QTH AM is with home brew or vintage equipment
However, I use a rice box when mobile.  I have a IC-706 MIIG in my car and I 
did have a Kenwood TS-480 HX in my truck.  I sold the TS-480 and bought the 
IC-7000.

The 706 works just fine on AM.  The 480 transmitter was OK, however the 
receiver was rather poor on AM.  I played around with the IC-7000 at the 
local HRO Store and was so impressed with the receiver I bought one on the 
spot.  Of course, HRO does not have the rigs set up to operate their 
transmitters (at least by customers).  As a result I found out about the AM 
Mod problem after I had installed the rig.

So, looks like I traded one problem for another. Hi Hi

At least with a transmitter mod problem, if ICOM does nothing, I can always 
home brew an AM transmitter (a final and a modulator) using the 7000 to 
drive it.  I am better off with the 7000 vs. the 480.

73,
Larry K3JRR




----- Original Message ----- 
From: "Chris BONDE" <ve7hcb at rac.ca>
To: "'ICOM Reflector'" <icom at mailman.qth.net>
Sent: Thursday, April 06, 2006 01:08
Subject: RE: [ICOM] IC-7000 AM Modulation Problem


>
>
>> Hi Larry,
>>
>> There could be a problem in the way the 7000's DSP algorithm generates
>> AM. In the IC-756Pro series, AM works really well.
>>
> SNIP
>> Cheers for now, 73,
>> Adam VA7OJ/AB4OJ
>>
>
> May I add to Adam's observation of the IC-756P series?
>
> I have an old one, an IC-756Pro S/N 1002 plus Heil HC-4 head set.  As far 
> as I am
> concerned it works great!
>
> One night on 75, I was tuning around, watching the spectrum looking for a 
> signal.
> There was this odd looking (at least to me) big bump on the scope.  I 
> tuned there,
> could not understand, then pushed the AM button.  Wow, great sound!  He 
> was
> calling CQ.  I responded.  He returned with a long discourse on what he 
> was
> operating, plus accolades on my signal.  I gave him a signal report along 
> with my
> QTH.  He then responded with more info on AM quality etc and stating that 
> I had a
> very good signal.  What was I operating?  I told him, IC 756P with a Heil 
> head set
> (not gold, just standard).  The next transmission he had to go to do 
> something.
>
> I guess that my call sign was spread amongst the AMers as whenever I 
> answered a
> CQ on that frequency I never made a contact.
>
> So from that experience, I think that the AM on the 756P is good.
>
> Chris opr VE7HCB
>
>
> ----
> Your Moderator: Dick Flanagan K7VC, icom-owner at mailman.qth.net
> Icom Users Net: Sundays, 1700Z, 14.316 MHz
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>