"Kev" <kevcat@[EMAIL PROTECTED]
> wrote in message
news:481d895d$0$13948$afc38c87@[EMAIL PROTECTED]
> atec77 wrote:
> > Michael C wrote:
> >> "atec77" <atec77NOSPAM@[EMAIL PROTECTED]
> wrote in message
> >> news:fvjlit$mt5$2@[EMAIL PROTECTED]
> >>> you get what you pay for , they work
> >>
> >> Thanks for the reply. What would a more expensive model do that this
> >> one doesn't?
> >>
> >> Michael
> >>
> > Better transmitted clarity but most im****tantly if your in a close
> > situation have better selectivity , ask kev as I think he uses them
more
> > than me ( both have ham tickets though)
>
>
> Uniden don't think selectivity should be a feature of their new small
> radios so they leave it out
> in any high RF area(such as any city or mountain top) you will hear
> every signal in the UHF band, that includes all the data signals used by
> trunking systems and taxis etc.
> and you WON'T be able to squelch it out
In very high RF fields, even a cavity resonator does not keep at
sufficient
low-level, frequencies from sites such as TV and BCast transmitters
getting
thru your RX frontend and creating a myriad of crap in the first
osc/mixer.
Then you have the passive mixers where interfering frequencies are
generated
in a local tower, or someone's unfiltered TX PA stage for example, are
spewed into the atmosphere right within your operating band/s.
If I was operating on UHF CB in my car, I would install a cavity resonator
between the aerial and TXRX with sufficient Q or bandpass, to handle the
channels. They aren't cheap, but they work very well. Insertion loss is
usually less than 2db. That'swhat we used at workforfrew multiplexing into
one AE all our Txs, and similarly, the RXs. Quality double ****elded co-ax
is
also a worthwhile addition if RFInterference is a major prob.
Jason
> their transmitted audio is also awful, usually very muffled and too
harsh
>
> GME radios are Australian made and have much better selectivity(though
> if you drive close enough to Optus TV Cables you can hear the audio of
> one of the channels on CB CH14)
>
> get a GME first
> then one of those crappy Icom 400PRO(but do not bump it up to 25 watts
> as it will only last a few months)
> and as a very last resort get a Uniden
> the larger Uniden radios(UH088, UH100 and the newer I think UH095) are
> not so bad with selectivity
> but their audio is still crap
>
>
> Kev
>
>
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