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VHF Aviation FBO Antenna
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Phil
Jan 22, 2012, 11:43:13 PM1/22/12
to
Hello , am looking for advise on a VHF Omni directional antenna for a small
fixed base operation , looked at a commercial ant. and the price is a little
high for a 1/4 wave vertical , am sure the quality is there but am wondering
if I could modify a Ringo or something else to work just as good , would
have it resonate on 123.000 as this is our Unicom freq., a little gain would
be OK .
Thanks
Phil L.
W8KLK
fixed base operation , looked at a commercial ant. and the price is a little
high for a 1/4 wave vertical , am sure the quality is there but am wondering
if I could modify a Ringo or something else to work just as good , would
have it resonate on 123.000 as this is our Unicom freq., a little gain would
be OK .
Thanks
Phil L.
W8KLK
Bob
Jan 23, 2012, 12:10:05 AM1/23/12
to
Regards,
Bob KA7HLB
Wayne Paul
Jan 23, 2012, 1:31:02 AM1/23/12
to
> "Phil" wrote in message news:jfioh...@enews6.newsguy.com...
Why don't you build a J-Bar?
http://www.soaridaho.com/Antenna/J-Bar_Antenna.htm
Or even simpler, sting the following antenna in side a vertical piece of PVC
pipe.
http://www.soaridaho.com/Antenna/
Wayne
W7ADK
Scott
Jan 23, 2012, 6:35:45 AM1/23/12
to
SO-239 chassis mount antenna connector. 1/16" brass rod from
Menards/Home Depot, etc. works great for the elements.
At 123 MHz, the vertical element for the center pin should be just shy
of 23" total from tip to bottom of the solder cup on the connector
(22.83" to be exact, but not extremely critical) and the radial elements
should be about 24" and bent so they droop at a 45 degree angle.
A standard PL259 connector fits nicely inside a piece of 3/4" copper
water pipe. You can cut some slots about 3/4" long in the end of the
pipe with a hacksaw , slide the PL259 in until the SO239 bottoms out
against the pipe and secure with a hose clamp. I would use a short
piece of copper pipe as a long 10' piece might be apt to bend over in
high winds.
http://www.hamuniverse.com/2metergp.html
RST Engineering
Jan 25, 2012, 1:07:42 PM1/25/12
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I just designed and made one for the son of one of my students. It
cost us about $5 in bits and pieces. I've posted it to my public
folder on Dropbox (jwe...@gmail.com) It will appear in Kitplanes
this May if you want to wait that long.
Use it with my compliments.
Jim
cost us about $5 in bits and pieces. I've posted it to my public
folder on Dropbox (jwe...@gmail.com) It will appear in Kitplanes
this May if you want to wait that long.
Use it with my compliments.
Jim
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