On Sun, 22 Apr 2012 10:34:23 +0200, Helmut Wabnig [email protected] ---
-.dotat wrote:

On Sat, 21 Apr 2012 20:23:04 -0700, Jeff Liebermann
wrote:

gain. However, I'm not in the mood for building yet another
mechanical marvel, and will probably use the discone.

discones are fine, but like to pick up static.
w.

Static electricity or radio static noise? Static electricity should
not be a problem as the PCR1000 probably has a 100K resistor across
the antenna connector. This is standard on most radios. If not, I
can easily add one to bleed off any excess charge.

At VHF frequencies, any generated radio static should not be a
problem. The building is high enough that it might end up inside a
thunder cloud, where precipitation static might cause trouble.
Besides, there's not enough dielectric material on the discone to
build up much of a charge. If the humidity is low enough and the wind
speed high enough to create arcing, I'll have much bigger problems
than to deal with than a little static noise.

However, there may be another problem. We try to use grounded and low
impedance antennas on mountaintop sites in order to reduce induced
currents from nearby lightning hits. Both my proposed antennas are
ungrounded and/or fairly high impedance. Oh-oh.


--
Jeff Liebermann
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558