On 4/14/2014 5:28 PM, Jorge Diez - CX6VM wrote:
I tested today from home, less than 1 kmts from the broadcasting antenna and
didn´t notice it.
Jorge,
I suggest that you try to find a portable (or mobile) RX that tunes 80M,
then walk or drive around to try to hear it. Such products are often the
result of rectification by some non-linear junction, and are
re-radiated. The Tecsun PL-660 is an excellent consumer all-band RX that
sells for about $130 in the US. It can detect AM, SSB, and CW on the HF
bands, and covers from long wave (~ 250 kHz) up to 30 MHz, plus FM
broadcast and the AM Aircraft band (~ 118 MHz to 132 MHz). Sensitivity
is pretty good.
Many ham FM talkies have the additional RX capability from the AM
broadcast band up to 800 MHz. I use my Kenwood TH-F6A for that fairly
often. Sensitivity falls off a LOT outside the VHF/UHF ham bands, but it
will hear stuff if you're really close. There are also ICOM and Yaesu
talkies with this capability.
73, Jim K9YC
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