UHF/VHF Preamp
- Thread starter KD0BML
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People do it all the time. People who know a lot about preamps generally avoid the practice.
I use a pre-amp on a dedicated reciever for a specific service. The main trouble with pre-amps is that they are broadband. I am feeding the input from the antenna through a pair of tuned cavities then to the pre-amp. Typically I have better recieve than the service dispatcher. 
Well Gary, what you have there is a preselector, not a preamp. By putting tuned circuits ahead of the active stage(s) you have mitigated the possibility of overload and intermodulation from strong unwanted signals, a feature notoriously absent in those DC to light preamps.
The bottom line here as it has been stated many times before, a broad band amplifier in an RF rich environment often creates more problems than it solves.
The bottom line here as it has been stated many times before, a broad band amplifier in an RF rich environment often creates more problems than it solves.
Last month I ordered the GRE pre-amp for scanners, from Grove Enterprises in Brasstown,N.C., and it has improved my reception tremendously on both my GRE and Uniden scanners.
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