[ICOM] IC-706MKIIG And Ambient Noise

[JerryM]

I totaly silenced (rf wise) my Kawasaki B-1 1500 by going to resistor plugs
(those ending in R usually). Before that it got right thru the discriminator
on my old IC-2AT. Check your plugs? Might be a help? Change just one and see
if there is a blank spot in the pattern?
----- Original Message ----- 
From: "Casey Raskob III" <speedlaw at verizon.net>
To: "ICOM Reflector" <icom at mailman.qth.net>
Cc: <Doug.Davies at gems3.gov.bc.ca>
Sent: Wednesday, June 16, 2004 2:49 PM
Subject: Re: [ICOM] IC-706MKIIG And Ambient Noise


> I think that it's just part of mobiling.  I have a very quiet car, with
only
> spark gap noise.  Here in NYC, Vhf and Uhf are quiet, but for occasional
> intermod, when line of sight with a tower or building with a million
> antennae.
>
> I'm a mere Tech, so can't comment.  Using an 11 meter mag mount to listen
to
> shortwave on AM, I am hammered by the ignition noise until the stations
> break s5.  On sideband, I can normally ignore what little noise there is,
> and copy weak stations. Sometimes I'll tune a SW station by SSB.  Again,
I'm
> doing this with a nonresonant antenna, and on Sideband, the radio is much
> more quiet than AM, so the BBC is noiser than W5XYZ calling CQ on 18
meters.
> I spoke to the head of electronics at BMW, and he said there's nothing
that
> can be done about the noise from the spark coils.  The car makes zero
other
> electronic noise. (he also told me that the transmitter should not cause
any
> problems with the car's electronics, despite the nasty lawyer sticker on
the
> window)
>
> I recently had some Qso's on 144.235 usb with very, very low signal
levels,
> and with the preamp on and AF gain all the way up, had no car generated
> noise, while the car was moving over the Tappan Zee Bridge. I was able to
> cover 35 miles mobile over water, and QSO from the Tappan Zee Bridge all
the
> way to Staten Island.
>
>  Powerlines sometimes toss junk, and I can often tell how far I am from an
> RF generator-car by the noise from that car or truck.
>
> The dsp could be much better.  The NB on the 706 is pointless, but the NB
on
> the 746 Pro is wonderful.  I normally run level 2 or 3 for AM SW
listening,
> and 1 or 0 for SSB, turning it off totally for FM use.  I rarely get FM
hash
> unless right under a sloppy power line, but then the cause is clear and
goes
> away quickly.
>
> I am very well grounded (at least the radio is) and have firm grounds for
> battery, auto structure ground, and antennas.  I also have a bunch of
> Toroids on all my lines.
>
> Check to see if your remote cable is SCREWED into the radio side.  It is
> also a ground, and I had mucho noize using only the plastic clip to hold
it
> in.  When the screw was installed, the noise dropped substantially,
leaving
> me with only the spark gap noize from the spark coil packs.
>
> Casey
> K2FIX
> The Icom 706.  ~Hams, cops, truckers, shortwave broadcasters, all in one
box
> !~
>
>
> ----- Original Message ----- 
> From: "Davies, Doug A FOR:EX" <Doug.Davies at gems3.gov.bc.ca>
> To: "'ICOM Reflector'" <icom at mailman.qth.net>
> Sent: Wednesday, June 16, 2004 11:44 AM
> Subject: [ICOM] IC-706MKIIG And Ambient Noise
>
>
> > This may have been discussed before but I haven't seen it.  Has anyone
> > noticed that their IC-706MKIIG is very sensitive to ambient noise?  I
have
> > been fighting a noise problem with my mobile setup for the past year and
> > have determined that the majority of the problem lies with the radio
> itself.
> > In fact, when I'm driving, the 706 even picks up line noise just about
> > everywhere, even on VHF, with a noise level in excess of S-7 most of the
> > time.  As a test, I substituted my old IC-735 in the truck and most of
the
> > noise was gone.
> >
> > I have played with the DSP settings, filters, etc all with no success.
> I'm
> > wondering if I have a crappy radio or if this is common to the 706MKIIG.
> I
> > really like mobiling and am considering dumping the MKIIG if this
problem
> > can't be corrected. Your experiences with this would be appreciated.
> >
> > Doug  VA7DD
> > ----
> > Your Moderator: Dick Flanagan K7VC, icom-owner at mailman.qth.net
> > Icom Users Net: Sundays, 1700Z, 14.316 MHz
> > Icom FAQ: http://www.qsl.net/icom/
> >
>
>
> ----
> Your Moderator: Dick Flanagan K7VC, icom-owner at mailman.qth.net
> Icom Users Net: Sundays, 1700Z, 14.316 MHz
> Icom FAQ: http://www.qsl.net/icom/
>
>