Topband: How Good is Good Enough?

[Petr Ourednik]

Mike,

I am confirming Carl's experiences. Just in my case the BOG is 600' long
and terminated at 330 ohms. When I tried to use my W7IUV preamp giving
20dB
it was too much and noisy. So finaly I am using this preamp with W2PM
rotary
loop and BOG is used alone w/o preamp and works very well on my
property.
(50 ohms feed line system is used)

73 - Petr, OK1RP




On Mon, 12 Mar 2012 07:29:50 -0400, "Dan Kovatch"
<w8car at buckeye-express.com> said:
> I'm in Carl's camp. Both my Bogs are shorter at about 350 feet but one
> was 
> once over 500 and worked fine (had to shorten due to 'development of real 
> estate'. I terminate at 270 ohms and wind xfrms for the same impedance.
> No 
> preamp needed and they are very quiet so signals just pop out of the
> noise 
> floor.
> 
> Dan W8CAR
> 
> -----Original Message----- 
> From: ZR
> Sent: Sunday, March 11, 2012 8:58 PM
> To: Mike Waters ; topband
> Subject: Re: Topband: How Good is Good Enough?
> 
> Ive said several times that my 500' BOG's dont need a preamp. The signal
> level may be 5-6dB lower than the elevated ones in the same direction but
> thats more likely due to signal angle.
> 
> One or two on here keep claiming 500' wont work and I say it all depends
> upon the ground.....mine is about as poor as you can get.
> 
> For best performance you need to know your RF ground resistance and wind
> the
> transformer accordingly. I used 250 Ohms for the ground.
> 
> Carl
> KM1H
> 
> 
> ----- Original Message ----- 
> From: "Mike Waters" <mikewate at gmail.com>
> To: "topband" <topband at contesting.com>
> Sent: Sunday, March 11, 2012 6:12 PM
> Subject: Re: Topband: How Good is Good Enough?
> 
> 
> > How does the signal level from a BOG compare to the signal level from an
> > elevated Beverage? I'm sure the output from a BOG is less. But how much
> > less? Enough to require a remote preamp? I've always wondered.
> >
> > I --and many others-- have found a remote preamp on an *elevated* Beverage
> > to be totally unnecessary, even with the lossy matching transformers that
> > I
> > used in the past. The only DC I ever run down my ~600' of  RG-6 feeding a
> > Beverage is to reverse directions.
> >
> > 73, Mike
> > www.w0btu.com
> >
> > On Sun, Mar 11, 2012 at 8:50 AM, Pete Smith N4ZR
> > <n4zr at contesting.com>wrote:
> >
> >> I have about 350 feet of quad-shield RG-6 ... it has only one BOG on it
> >>
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