[SixClub] RE: [50mhz] Commercial vertical antenna for 52 MHz

[CBoone]

Those GPs on Ebay are nicely built BUT they are not DC grounded...look at
one with a spectrum analyzer on a cool/cold dry day and watch the noise!
There is no place for it to drain except through the rcvr front end...OUCH!
A DC Grounded antenna will lower the noise on such days and makes a BIG
difference...especially if your rcvr does not have a Noise Blanker (and on
6/lowband commercial, that is pretty much mandatory!)
The Ebay GPs would make a good rptr xmit antenna on 6 but even then, if it
gets hit by lightning, say bye bye to the PA and likely the entire xmtr and
power supply. A halfwave vertical made out of 1/2in or smaller EMT and gamma
matched in the center would be a better choice (especially on rcv)...or make
a grounded GP and gamma match the vertical radiator..
(On 6, I like to do anything possible to keep the noise out....which is why
I use a Larsen NMO150 grounded 5/8wave 2m antenna on 6 FM mobile....works
better than the Larsen NMO47 or MNO5x NON grounded 1/4wave antenna!)

Chris
WB5ITT

> -----Original Message-----
> From: 50mhz-bounces at mailman.qth.net 
> [mailto:50mhz-bounces at mailman.qth.net] On Behalf Of Ron 
> Lawrence KC4YOY
> Sent: Sunday, March 06, 2005 2:33 PM
> To: Mike (KA5CVH) Urich; 050 Mhz; Six Club
> Subject: Re: [50mhz] Commercial vertical antenna for 52 MHz
> 
> Mike, I see 6 meter ground planes listed on ebay
> all the time for about $39.
> I run a home brew 6 GP in the attic for FM & AM, it works great.
> 
> Ron
> 
> 
> Ron Lawrence, kc4yoy
> (Curmudgeon in training)