[ICOM] 756Pro Alinement

Tue May 25 09:46:52 EDT 2004

All,

On page 11 of the 756 Pro II manual, there is a procedure for adjusting the master oscillator - doesn't the 756 Pro have the same capability?

73, Charles, K4ZRJ

-----Original Message-----
From: "Frank A. Ellis" <w3uhf at yahoo.com>
Sent: May 25, 2004 9:24 AM
To: ICOM Reflector <icom at mailman.qth.net>
Subject: Re: [ICOM] 756Pro Alinement, Shade Tree Mechanics

Ken,

IF Shift And PBT will not affect the tone of the zero
beat note, which you mentioned was different between
sidebands. If WWV does not zero beat the same on USB
and LSB when the radio is tuned to 10.000 MHz, and the
SSB mode switched, then the ref oscillator is a little
off frequency. This will also cause the received
signal to be incorrectly placed on the bandscope.

73 Frank W3UHF

--- "Ron Lowrance, K4SX" <k4sx at akorn.net> wrote:
> Ken,
> 
> This may be an IF filter problem.  The IF shift via
> the LSB or USB filter
> may be your problem and alignment may fix it but
> possibly not.  I would
> contact ICOM and send it back to them for repair.  I
> would not take advice
> from "shad-tree-mechanics".  My opinion.  These
> radios are very complex and
> what may work typically on one radio may not work on
> the Pro,
> 
> Ron Lowrance
> Cumming, GA
> 
> http://www.k4sx.com
> 
> 
> 
> ----- Original Message ----- 
> From: "Ken" <k9fv at highstream.net>
> To: "ICOM Reflector" <icom at mailman.qth.net>
> Sent: Tuesday, May 25, 2004 9:02 AM
> Subject: Re: [ICOM] 756Pro Alinement
> 
> 
> > Good morning Ron, and thank you for your response.
> >
> > You are correct, the signal will shift when
> switching from AM to LSB and
> to
> > USB, but it should shift the same amount - it
> doesn't.  It's only a small
> > amount, but you can actually tell it from the
> bandscope, but hearing it is
> > more telling.  For normal CW (or SSB) it's not
> enough to cause a problem,
> > but when working the digital modes, it is more
> telling.
> >
> > Any ideas?
> >
> > Ken
> > ----- Original Message ----- 
> > From: "Ron Lowrance, K4SX" <k4sx at akorn.net>
> > To: "ICOM Reflector" <icom at mailman.qth.net>
> > Sent: Tuesday, May 25, 2004 7:52 AM
> > Subject: Re: [ICOM] 756Pro Alinement
> >
> >
> > > When tuning the WWV signals on 5, 10, and 15MHZ
> the typical mode is AM.
> > You
> > > will notice that the AM signal is centered on
> the center line of your
> > > display.  When you change to LSB the signal will
> shift one direction and
> > the
> > > opposite for USB.  If I understand your question
> correctly and your
> radio
> > is
> > > behaving in the manner just described, so your
> radio is operating
> > properly.
> > > If I missed your point please send me an email.
> > >
> > > K4SX
> > > Ron Lowrance
> > > Cumming, GA
> > >
> > >
> > >
> > >
> > >
> > > ----- Original Message ----- 
> > > From: "Ken" <k9fv at highstream.net>
> > > To: <icom at mailman.qth.net>
> > > Sent: Tuesday, May 25, 2004 8:42 AM
> > > Subject: [ICOM] 756Pro Alinement
> > >
> > >
> > > Hi all,
> > >
> > > I have a 756Pro that seems to be out of
> alignment.  If I tune in
> 10.000mhz
> > > on AM, then switch to USB then LSB, shouldn't
> the sound be the same on
> > both
> > > LSB and USB?  It is not.  I've checked at 10,
> 15, and 20mhz on the WWV
> > freqs
> > > and USB/LSB tone is off on all bands, but amount
> of tone off varies per
> > > band.
> > >
> > > I looked at the ICOM alignment procedure in the
> manual, but was told by
> a
> > > couple of folks that would not do the alignment
> I needed.  Is this true?
> > OR
> > > would this  procedure work?
> > >
> > > I would like to find a repair should within a
> couple of hundred miles of
> > > Mobile, AL so I could perhaps take the rig in
> one morning, and pick it
> up
> > > that afternoon if at all possible.
> > >
> > > Thanks for any info/help anyone can provide.
> > > Ken H>
> > > K9FV
> > > ----
> > > 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/
> > >
> >
> > ----
> > 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/

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----
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/