Topband: : how to check a BOG

[K1FZ-Bruce]

Yes, wide sweep from 1000KHZ to about  7000KHZ  Had to drive the 
ground rod a few times.  My last estimate of removal wire resulted in 
the wire "too short'
Had to add wire. Had enough  of driving, and removing ground rods.  
Was one that wedged in the ledge rocks and is still there. 

73
Bruce-k1fz

On Sun, 23 Oct 2016 15:33:44 -0400, "N2TK, Tony"  wrote:

       Bruce,
Did you sweep from say the AM band up to 40M to find the null? Was the 
null pronounced? I assume as you shortened the wire you hooked up to a 
terminating resistor and repositioned the ground rod?

Tnx
N2TK, Tony

-----Original Message-----
From: Topband [mailto:topband-bounces at contesting.com] On Behalf Of K1FZ-Bruce
Sent: Sunday, October 23, 2016 3:02 PM
To: Art Snapper ; Topband
Subject: Topband: : how to check a BOG

I purchased a MFJ 5014 noise generator for $ 39.95 (it took awhile to 
get here, think they build to order.)

At Mid-day time to reduce interference, set it way out, with about 20 
feet of wire sitting on the ground in the direction of the BOG null. 

Tuned frequencies on the receiver to find minimum signal, trimmed the 
BOG wire to bring the null into 160 meters. 

"Worked like a charm"

73'
Bruce-k1fz
http://www.qsl.net/k1fz/bogantennanotes/

On Sun, 23 Oct 2016 13:57:41 -0400, Art Snapper wrote:

I took a hint from Luis HC1PF. A small 1.8+/- clock oscillator and a 
wire attached to a pole is what he used. 
I found said oscillator on eBay. 

It worked, but I am not sure the near field results should be taken for 
granted. 

73
Art NK8X
p.s. Still trying to figure out the computer problem that plagued me 
during the SP, and is gone now!

On Sun, Oct 23, 2016 at 12:53 PM, Bob K6UJ wrote:

> How do you plot the directivity of your BOG ?
> I am toying with the idea of either transmitting from my car HF rig 
> (milliwatt sig) and plotting the pattern from diff directions or is 
> it possible to transmit with the BOG with a real low milliwatt sig ? 
> I was thinking then I could drive around with my HF rig in the car in 
> about a half mile radius and see if I could plot the pattern. This 
> might not be doable, but thought I would throw it out there. 
> How do you test your BOG ?
>
> Bob
> K6UJ
>
>
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