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Michael Coslo wrote:

What is the antenna length?


Now as for Al foil as an antenna construction material:

It works electrically, but isn't very strong. Your cardboard tubes
aren't terribly weatherproof either. You might be able to shellac them

heavily. But still it isn't a very good choice.

Making contact with the aluminum could be an issue. Tubular aluminum
is
used on antennas, but the connection is usually helped by corrosion
inhibitors, and nuts/bolts with washers to help "dig in" to the AL.
Your
thin foil will deform at best, and more likely rip with that sort of
treatment.

The antenna is abt 34 ft (1/4 wave for 40 meters).

The cardboard tubing was for weight - this ant. was to be a portable
ant. and would be deployed only in good wx.

"Treatment" - that's why I wrapped the tubes/foil in clear plastic
wrapping tape. Barring me accidentally smashing them or some
discombobulated squirrel "having at 'em" I'd expect them to last for abt
a year or 2.

Regards & 73s,
--
MGFoster:::mgf00 at earthlink decimal-point net
Oakland, CA (USA)
KI6OFN

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