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


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> 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