As I mentioned to Tom privately, W8JI has some notes on his website
regarding this topic. The idea of "shielded conductors" having better
noise performance is a myth, and is typical of those that (as W8JI has
often stated) are impossible to expunge from public consciousness once
they appear in print.
73,
Dave AB7E
On 11/8/2011 2:24 AM, Steve Hunt wrote:
> Tom,
>
> Wanted signals are EM waves; noise signals are also EM waves. I wonder
> what characteristic of a Double Bazooka might allow it to distinguish
> wanted EM waves from unwanted ones in a way that a conventional dipole
> can't. As you might gather, I'm sceptical :)
>
> Measurements and modelling confirm that it DOES have a slightly wider
> VSWR bandwidth than a wire dipole - partly because of the loss in the
> stubs, and partly because it's constructed from "fatter" conductors. You
> could probably achieve the same bandwidth enhancement, without the
> mechanical complexity, by putting a resistor in parallel with the
> feedpoint of a conventional dipole.
>
> 73,
> Steve G3TXQ
>
> On 08/11/2011 05:54, Tom Osborne wrote:
>> Hi All
>>
>> I've been looking at some info on the Double Bazooka antenna. I know the
>> 'wide band' aspect has been debunked, but in looking at the design, would it
>> be a quieter antenna?
>>
>> I see that low band loops are shielded on the outside and have an opening at
>> the top. Wouldn't the bazooka kinda do the same thing, beings the outside
>> of the antenna is actually shielded? 73
>>
>> Tom W7WHY
>>
>>
>>
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