[ICOM] IC 735 CW Power Output

Thu Aug 12 17:20:49 EDT 2010

Jim,

As a rule you are correct. However there are several variables that will
give a false impression of power. if you overdrive in SSB modes, then the
ALC will go higher than normal in an effort to level the power output. If
the meter is in the ALC position, then it could give a false impression of
more power because the ALC will swing along with the power. High SWR will
give the same effect.

I have no idea whether that is a factor in Nate's case. But being a new
radio to him, its possible some switches are not in the normal position. The
best test is a good power meter and a dummy load. Its possible that there is
a problem around the narrow filter he installed. My suggestion was aimed at
making sure all the correct operating conditions was in place before
assuming an internal electrical problem. There is also the possibility of
low audio drive from the internal CW tone generator, and not even related to
the filter. He did not tell us that it was ok before adding the filter. The
problem could have pre-existed.

The IC-735 is not a large radio and the adjustment pots and control switches
are small and easily placed in the wrong position. This is especially true
when I operate mine in the Motorhome. I guess that is why they install a
cover over the adjustment pots and switches, which is usually the first
thing that gets removed and lost. I still have mine..."somewhere" in safe
keeping...(:->.

     73's Jim
      W5IFP

> -----Original Message-----
> From: icom-bounces at mailman.qth.net
> [mailto:icom-bounces at mailman.qth.net]On Behalf Of Jim Vohland
> Sent: Thursday, August 12, 2010 3:13 PM
> To: icom at mailman.qth.net
> Subject: Re: [ICOM] IC 735 CW Power Output
>
>
>
> Just a thought to keep me straight. I thought he said he had full
> output on ssb but not on cw. If the meter was in the wrong
> position, wouldn't it have only shown partial deflection of ssb.
>
> > Date: Thu, 12 Aug 2010 12:21:18 -0700
> > From: n4ydu at yahoo.com
> > To: icom at mailman.qth.net
> > Subject: Re: [ICOM] IC 735 CW Power Output
> >
> > Thanks Jim - I'll check it out when I get home today.
> >
> > 73,
> >
> > Nate/N4YDU
> >
> > --- On Thu, 8/12/10, Jim Hargrave <w5ifp at gvtc.com> wrote:
> >
> >
> > From: Jim Hargrave <w5ifp at gvtc.com>
> > Subject: Re: [ICOM] IC 735 CW Power Output
> > To: "ICOM Reflector" <icom at mailman.qth.net>
> > Date: Thursday, August 12, 2010, 2:01 PM
> >
> >
> > Nate,
> >
> > Check your "Meter" switch. If it is in "ALC" position it will
> show about 1/2
> > power which is at the top of the ALC scale.
> > Make sure the switch is in the "PO" position (not depressed).
> > If the switch is depressed it will be in the ALC position.
> > Also make sure the SWR switch in the back of the radio is in the "PO"
> > position.
> >
> > Enjoy the nice radio. I have had mine for 22 years and its still going
> > strong. Mine has only been opened twice. Once to change the
> battery and the
> > other time to change the CI-V baud rate to 9600.
> >
> >      73's Jim
> >       W5IFP
> >
> >
> >
> > > -----Original Message-----
> > > From: icom-bounces at mailman.qth.net
> > > [mailto:icom-bounces at mailman.qth.net]On Behalf Of Nathan Moreschi
> > > Sent: Thursday, August 12, 2010 6:13 AM
> > > To: ICOM Reflector
> > > Subject: Re: [ICOM] IC 735 CW Power Output
> > >
> > >
> > > Thanks, but I highly doubt the filter has changed the
> > > output...the output is
> > > the same with the filter on or off.
> > >
> > > 73,
> > >
> > > Nate/N4YDU
> > > ----- Original Message -----
> > > From: "GGLL" <nagato at arnet.com.ar>
> > > To: "ICOM Reflector" <icom at mailman.qth.net>
> > > Sent: Thursday, August 12, 2010 12:07 AM
> > > Subject: Re: [ICOM] IC 735 CW Power Output
> > >
> > >
> > > Maybe a carrier adjustment is in order; with the new, narrower filter,
> > > the carrier position could be slightly off the passband.
> > >
> > > Regards
> > > Guillermo - LU8EYW.
> > >
> > > El 11/08/2010 23:56, Nathan Moreschi escribió:
> > > > Guys,
> > > >
> > > > I received an IC 735 the other day and I am having fun with it. I
> > > > managed to install and INRAD #111 400hz filter tonight without any
> > > > problems.
> > > >
> > > > I detected a problem however when operating in CW. The power out is
> > > > just 50 watts rather than 100. I get more than 100 watts out on SSB
> > > > and FM. This is indeed strange to me...any thoughts???
> > > >
> > > > 73,
> > > >
> > > > Nate/N4YDU ---- 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/ To support QSL/QTH.net:
> > > > http://www.qsl.net/donate.html
> > > >
> > > >
> > > ----
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> > ----
> > Your Moderator: Dick Flanagan K7VC: icom-owner at mailman.qth.net
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>
> ----
> Your Moderator: Dick Flanagan K7VC: icom-owner at mailman.qth.net
> Icom Users Net: Sundays, 1700Z, 14.316 MHz
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> Checked by AVG - www.avg.com
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