Re: [IRCA] BOG Antenna Questions

[Russ Edmunds <wb2bjh@xxxxxxxxx>]

--- Vernon Matheson <vmath@xxxxxxxxxxx> wrote:

> 
> 
> Hi all,
> 
> I am wondering if there is anyone on the list that has considerable
> experience using various length BOG antennas and could comment on
> their
> directivity.
> 
> Here is Nova Scotia I am running a 2000' E/W and a 1000' N/S. I use
> these
> antennas for NDB's and BCB reception. I use a 75/j - 11:33 turns to
> couple
> to them and feed with 75ohm coax
> 
> What I would like to know is how directive they are as compared to a
> beverage 10' in the air.
> 
> I seem to have a null spot from approximately 30-60 degrees. I would
> have
> thought that by setting them up the way that I did they would have
> enough
> spread off each end to cover the middle.
> 
> Also....does adding length cause a BOG to me more directive?
> 
> All comments appreciated and thanks in advance.
> 


*** My understanding is that a BOG of length 'x' roughly equates in
performance to an elevated Beverage of '3x'. IN practics at the L;ong
Beach Island DXpeditions, we've had best results with BOG's in the
range of 500-800', which generally tend to yield a fairly good
directivity. I believe there are some illustrations on our group's
website, www.radiodxing.com.



Russ Edmunds
Blue Bell, PA ( 360' ASL )
[15 mi NNW of Philadelphia]
40:08:45N; 75:16:04W, Grid FN20id
<wb2bjh@xxxxxxxxx>
FM: Yamaha T-80 & Onkyo T-450RDS w/ APS9B @15'
AM: Hammarlund HQ-150 & 4' FET air core loop

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