"Jason James" <at@[EMAIL PROTECTED]
> wrote in message
news:481f6e60$0$28352$c30e37c6@[EMAIL PROTECTED]
> 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.
Exactly what I was going to say ;-)))) It all seems so simple when you put
it like that ;-))
Michael
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