On 5/6/2019 10:12 AM, Ken Winterling wrote:
are used in services that use
transmitters such as police, fire, ambulance, taxi, etc.

Because of the wavelengths involved, RFI coupling into circuitry at HF is VERY different from VHF/UHF, which is used by these services. Also, I don't know current practice, but when I was doing installs of VHF rigs nearly 60 years ago, 25-50 watts was what we were installing. Likewise, FM is much more difficult to detect (rectify) than SSB or CW.

73, Jim K9YC


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