Topband
[Top] [All Lists]

TopBand: VK6HD & Conditions

To: <topband@contesting.com>
Subject: TopBand: VK6HD & Conditions
From: hwardsil@wolfenet.com (Ward Silver)
Date: Tue, 7 Jan 1997 18:30:48 -0800 (PST)
Because I got a lot of request for details of the W0CM Snake antenna...


The W0CM Snake is described in detail in the August 96 issue of the
Lowband Monitor.

To summarize:

                        coax                              coax
        _____________________________________    ____________________
     - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 
    |   _____________________________________    ____________________
    |   1                                   2    3                  4
    |                   "A"                                "B"
    |
    |
    |                      125' ground radial
    o----------------------------------------------------------------
    G
    G
    G - ground rod
    G
    G
    G

The antenna is made from coax...I used RG-58C/U.

                Foam    Solid   Dielectric
Section A -     100'     88'    

Section B -      25'     37'

Total           125'    125'


At points 2, 3, and 4...solder the braid and shield together.  Yes, that
makes section B look like a big fat piece of wire...just do it :-)  Solder
sections A and B together at points 2 and 3.

The feedpoint (point 1) is tricky - connect the center conductor of the
coax to your receiver to the SHIELD of the section A coax at point 1.
Connect the shield of the coax to your receiver to the CENTER CONDUCTOR of
the section A coax at point 1.  Ground the CENTER CONDUCTOR of the section
A coax at point 1 to the ground rod.

Support the whole thing 8' or so above the ground and enjoy!

I haven't got the theory figured out yet, but it works for me.

73, Ward N0AX


--
FAQ on WWW:               http://www.contesting.com/topband.html
Submissions:              topband@contesting.com
Administrative requests:  topband-REQUEST@contesting.com
Sponsored by Akorn Access, Inc & KM9P

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