Topband: How Good is Good Enough?

[Dan Kovatch]

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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