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attic antenna and aluminum HVAC tubing

Jun 26th 2012, 22:34

k9ljq

Joined: Feb 26th 2011, 21:32
Total Topics: 0
Total Posts: 0
Planning on an antenna (or two) in the attic. The house is new and the heating and cooling are fed via flexible ALUMINUM COVERED tubing. Has anyone had any problems with high RFI/SWR etc. with this type of tubing? Or am I worrying about nothing.

tnx all

k9ljq
Jun 27th 2012, 15:36

AA6E

Joined: Apr 4th 1998, 00:00
Total Topics: 0
Total Posts: 0
Nearby conductors (AC wiring, ducting, etc.) can have a big impact on antennas, especially if they run parallel to the antenna and especially if they have anywhere near resonant length (multiple of 1/2 wavelength at operating frequency).

Nearby parallel conductors will affect your antenna performance in ways that are hard to predict. But you really don't want to put RF energy into your power, cable TV, or phone wiring! You may need to limit your transmit power for this reason.

73 Martin AA6E

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