"Barry" wrote in message
...
It's possible that the same display is used for other radios
that use FM. FM is not intended for use on the CB band,

Its used in the UK on their 11m band.

http://www.fact-index.com/c/cb/cb_radio_uk.html

but some folks do use it there. They do not use a regular CB
for this. You can't get FM on your AM/SSB radio because the guts of the
radio

Depending on the radio you may be able to use the steep side skirts of the
AM filter as a form of slope detector for FM. I've done it using an Icom
IC-706 ham rig. The problem is you have to be able to tune significantly off
the channel center frequency to put the signal center frequency on the skirt
of the AM filter. Normal unmodified CBs don't allow such frequency sliding.

http://www.tpub.com/content/neets/14.../14184_163.htm

http://www.somerset.net/arm/fm_only_lowtech.html

is a very different beast indeed.
Although it might have been a good idea for the FCC to
to make use of FM on 27MHz. It would have prevented
"skip" and that would have made them happy.

No it would not have done so. I've heard enough 10m FM DX to know. Try
monitoring 29.600 MHz which is the Ham FM national calling frequency on FM.

http://www.qsl.net/g3xbm/10m.htm (look under 10m FM)

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KC8LDO

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Depending on the radio you may be able to use the steep side skirts of the
AM filter as a form of slope detector for FM. I've done it using an Icom
IC-706 ham rig. The problem is you have to be able to tune significantly off
the channel center frequency to put the signal center frequency on the skirt
of the AM filter. Normal unmodified CBs don't allow such frequency sliding.

I've done it with a regular CB. I just turn the clarifier to either edge. It isn't
perfect, but quite understandable. My radio has a narrow receive bandwidth
compared to some radios. I'm still using my TRC-451 (Cobra 146). Other
radios I've done this with include a PC-122 (TRC-465). All stock. The last
thing I want is my transmit frequency to change after spending good money
on a PROPER tune-up to factory specs. No ruined clarifiers here. If I want
to go off-frequency, I have a 2950. It's clarifier is also locked. It shifts in
100Hz increments. Why chop it up for a clarifier mod?