A simple setup I've used for chasing impulse noise consists of both a
mobile rig and a talkie programmed for AM at around 160 MHz, 200, 300,
500, and the highest frequency at which they work (the Kenwood TH-F6A
talkie goes to about 560 MHz). I drive around with the mobile rig and
mag-mount vertical set to 160MHz until the signal is loud, then move
higher in frequency as I get closer. When I get close enough, I switch
to the talkie at it's highest limit, or around 440-450 MHz where my
small Yagi is tuned.
Without the Yagi, I'll use a duck on the talkie, holding it against my
body to form a half-space antenna.
73, Jim K9YC
On 9/11/2021 11:04 AM, Don Kirk wrote:
I also have 430 MHz portable DF gear including a portable 430 MHz Yagi, and
what I have found is that 136 MHz DF gear is more than adequate in 95 or
greater percent of the time as long as appropriate attenuation is used.
It’s easy for folks to acquire cheap 134 or 136 MHz portable AM receivers
(their 2 meter HT might have that capability and if not then a cheap
portable analog police scanners work great because they typically have
coverage down in the aviation band where AM is used).
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