Wonder if there is some method of resetting the CPU; maybe that would be a
good starting point.
Pat, K9JAUAt 08:18 AM 3/21/2005 -0500, you wrote:
>     Colin:
>
>You, and some of the others on the list could be very correct about the
>finals, but my son said that last week, the radio got into some weird "scan
>mode", where he couldn't even receive or transmit on 2-meters.  Now, at
>least, he has gotten it out of that mode so that it can receive on 2 meters.
>Still can't transmit, though.
>
>He has no mmanual for the rig, so it's anyone's guess as to how it got in
>that weird mode in the first place.
>
>The end result is that he can listen on both 2 meters and 440, can transmit
>on 440, but not on 2-meters, at least using the usual frequencies, tones,
>and off-sets.
>
>Will keep plugging away here.
>
>Best 73 from Tom Behler: KB8TYJ
>
>----- Original Message -----
>From: "Colin McDonald" <[log in to unmask]>
>To: <[log in to unmask]>
>Sent: Sunday, March 20, 2005 11:07 PM
>Subject: Re: help needed with Standard twin-bander VHF/UHF transceiver
>
>
> > This is a multi-part message in MIME format.
> >
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> > Content-Type: text/plain;
> >         charset="iso-8859-1"
> > Content-Transfer-Encoding: quoted-printable
> >
> > though i am unfamiliar with this radio, i can think of a few things that
> > would explain the lack of any rf output.
> > First, the finals are very likely different for VHF then for UHF and =
> > thus
> > the difference between the two bands. Someone correct me if i am wrong =
> > with
> > that, i would like to find out more about this model.
> > Second, the radio may have circuits in place that completely shutdown =
> > all rf
> > output when the finals are shorted, which is what happens when they are
> > blown.  A blown final creates a dead short and there may be some auto =
> > shut
> > down circuit inside the radio to prevent further damage to internal
> > components due to a dead short...this also leads me to believe that the
> > final transistors are different for UHF then VHF, they seem to be =
> > separate
> > sections of the radio.
> > Either that, as has already been said, there is some internal or chip
> > setting that prevents VHF output.
> > Not sure if you said already, but did it just stop transmitting all of a
> > sudden? or did it ever transmit on vhf?  I assume it receives alright on
> > VHF?
> > Regards
> > Colin