Topband
[Top] [All Lists]

Re: Topband: 160M Helical Vertical

To: "GERRY" <telwest@telusplanet.net>, <topband@contesting.com>
Subject: Re: Topband: 160M Helical Vertical
From: "Bill Wichers" <billw@waveform.net>
Date: Fri, 1 Apr 2011 11:51:33 -0400
List-post: <topband@contesting.com">mailto:topband@contesting.com>
To add to what Gerry mentioned about the legal limit voltages, I would
suspect the tape may be more prone to arcing than a round wire due to
the concentrated charges at the "sharp" edges being more prone to corona
discharge. Personally, I'd just use a wire as I doubt there would be
much difference using a tape and the tape is likely to be both more
expensive and more difficult to work with.

  -Bill

> Another thing to keep in mind is that at legal limits the voltage at
the
> base of a short loaded vertical can be very significant and might
short
> between windings. Also the tape clearly has to handle the high current
and
> not negatively impact radiation efficiency by adding significant
element
> resistance.
> 
> 73, Gerry VE6LB/VA6XDX
> VE6 QSL Bureau Team
> DXCC Field Checker
> ve6lb@telus.net
> 403-251-0384
> http://www.qsl.net/ve6lb
[snip]
_______________________________________________
UR RST IS ... ... ..9 QSB QSB - hw? BK

<Prev in Thread] Current Thread [Next in Thread>