...@ieee.org] On Behalf Of Jim Hulbert
Sent: Tuesday, July 12, 2011 2:27 PM
To: emc-p...@ieee.org
Subject: RE: Puzzle: Radiation from a disconnected TV antenna?
As Jim says: "The coax can be a resonant circuit as well. Being open at one
end it will reflect the signals back to the antenna
ilto:emc-p...@ieee.org] On Behalf Of Jim Bacher
Sent: Monday, July 11, 2011 8:10 PM
To: ri...@ieee.org; emc-p...@ieee.org
Subject: Re: Puzzle: Radiation from a disconnected TV antenna?
Rich, there is at least one preamp that was recalled due to defects in
manufacturing. The preamp would not onl
Rich, there is at least one preamp that was recalled due to defects in
manufacturing. The preamp would not only function as a preamp, it would
reradiate RF at other frequencies. What happened was the input fet or
transistor would oscillate due to poor placement of the active part. Dependent
on temp
Rich,
In days of yore, the FCC had vans equipped with radio receivers and
rotatable direction finding antennas mounted on the roof. They would
prowl around and find us crazy CB'ers that had kW-sized linear power
amps connected to our 1/4 wave antennas. It was quite a fun time. I have
no doubt
In message <83D4CD254221462D887D64D44C21EA89@RichardHPdv6>, dated Sun,
10 Jul 2011, ri...@ieee.org writes:
>Thanks for any explanations, and best regards,
If you were the FAA guys and found that you had come to the wrong house,
what would you do?(;-)
The most likely source of such interference
Either a passive (re)radiator as you said, or perhaps something in the house
was leaking a weak signal that was coupling into the antenna and being
transmitted very efficiently towards Portland (I assume the TV antenna was a
Yagi).
I bet the FAA was excited to find something aside from leaky CA
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