Topband: Short Bogs

[Ashton Lee]

My BOG was a breakthrough after previously using just my inverted L on receive. Its 300 feet fed through a 300 Ohm transformer. The transformer is grounded, but not the far end.

In the last week I added a Wellbrook loop which earned its place as my primary receive antenna in the Stew Perry after a bunch of side by side comparisons. The loop is much higher gain. It can be rotated but I wasn't set up to do so. The loop has slightly more noise than the BOG but way less than the transmit antenna. I've used one before in a different location, and find these to be an under appreciated option.


On Dec 30, 2012, at 10:40 PM, "Bruce" <k1fz at myfairpoint.net> wrote:

> 
> BOG antenna, BOG wire.
> 
> 
> Yes right on. Not only are there many variables with the earth, but different wire dielectrics are a big factor. 
> 
> I have sold many BOG transformers, and received a lot of feedback.  There are many different results, all but one was able to get a positive out come. That one insisted on using a TV antenna pre-amplifier.  I gained a lot of insight. 
> 
> One un-named customer was running his BOG across a highway late many nights. One night a car came, out of nowhere, at high speed just before he got the wire secured. It ripped the transformer wire out of his hand. He found it about 200 yards down the road. He never found the termination, thought to be attached to the car. Someone must have found it and wondered, What is this?  
> Now that is real determination to work 160 meter DX.
> 
> Anyway,  I do not disagree with anyone with different BOG results. There are way too many variables.
> 
> 73
> Bruce-K1FZ
>  ----- Original Message ----- 
>  From: Guy Olinger K2AV 
>  To: Charlie Cunningham 
>  Cc: Bruce ; topband at contesting.com 
>  Sent: Sunday, December 30, 2012 5:53 PM
>  Subject: Re: Topband: Fw: Short Bogs
> 
> 
>  The characteristics of #12 THHN and such vary all over the map.  It is not being made for use at RF.  The insulation not only changes the velocity factor, but it also adds loss.  This too varies all over the map.  
> 
> 
>  Wireman has various wires with UV resistant black PE insulation.  That stuff seems to be predictable and stable.  I personally don't know of any THHN with PE insulation.  YMMV, of course.  Neither of the guys at Home Depot and Lowes have any idea what I'm talking about if I mention PE insulation.  Apparently plastic is plastic  :>).
> 
> 
>  73, Guy
> 
> _______________________________________________
> Stew Perry Topband Distance Challenge coming on December 29th.
>