Topband: BOG Antenna Measurements

[W2PM]

I agree the BOGs are great for local crud reduction and in a suburban area while the DX performance isn't great, the S/N impact just from ducking the noisy switched power supplies, chargers, garbage low voltage lighting switching matchbox transformers, PCs etc is significant. Even 100 ft wires on ground with a small tuner can be a big boom to receiving. 

73 and HNY to all. Pete W2PM

Sent from my iPad

On Dec 23, 2012, at 20:51, "Carl" <km1h at jeremy.mv.com> wrote:

> 
> My own experience with 3 500' unidirectional BOGs over very poor ground is that a 220 Ohm resistor appears to be close to ideal for  me. YMMV depending upon the ground and how close to the ground the BOG actually is. Mine mostly ride 3-6" above ground on low plants, twigs, etc. and thru the woods. These were installed to reduce crud pickup from neighbors in the belief that they are not as susceptible as the regular Beverages. Operation has shown them usually more beneficial crud reducers but not as good on real long haul DX.
> 
> The 73-202 cores are wound transformer style and not unun autotransformer versions; the reason is to minimize common mode using the normal suggested seperation of antenna and feedline grounds
> 
> I hope others share their observations.
> 
> Carl
> KM1H 
> _______________________________________________
> Stew Perry Topband Distance Challenge coming on December 29th.