Order Tray | Contact Us | Home | SIG Lists

[aprssig] Helix Groundplane?

Andrew Rich vk4tec at people.net.au
Thu Dec 13 08:34:55 UTC 2007


Today I put my helix on the sitemaster and found it either needs a matching
plate on the first 1/2 turn or the 74 ohm matching section.

I was surprised. The VSWR has bad, but the signal improvement is brilliant.

Can't wait to make it properley


----------------------------------------------------------------------------
Andrew Rich VK4TEC
vk4tec at people.net.au <mailto:vk4tec at people.net.au>
http://www.tech-software.net




-----Original Message-----
From: aprssig-bounces at lists.tapr.org
[mailto:aprssig-bounces at lists.tapr.org]On Behalf Of Ev Tupis
Sent: Thursday, 13 December 2007 1:16 PM
To: TAPR APRS Mailing List
Subject: Re: [aprssig] Helix Groundplane?


The "groundplane" on a helix serves two major functions: impedence matching
and F/B ratio (as a shield to RF from behind).

Ev, W2EV




      ______________________________________________________________________
______________
Looking for last minute shopping deals?
Find them fast with Yahoo! Search.
http://tools.search.yahoo.com/newsearch/category.php?category=shopping

_______________________________________________
aprssig mailing list
aprssig at lists.tapr.org
https://lists.tapr.org/cgi-bin/mailman/listinfo/aprssig





More information about the aprssig mailing list