[Premium-Rx] Wellbrook excellence !

[machine.age at comcast.net]

I have wanted a Wellbrook for years, but no one seems to carry their products in the USA. No surprize; although I am sure Universal could do. Fred Osterman, can you opine here?  Fred, while you are at it, please advise re 4th edition of your tome before HF totally dies.  
I also thought about bringing one back from my annual trips to the UK, but its a sizeable brute---which makes international shipping a big problem as well.

John England


 -------------- Original message ----------------------
From: Al Klase <al at ar88.net>
> Alberto and the Group,
> 
> I too am an antenna experimenter, and one time manufacturer.  I don't at 
> all blame Well brook for protecting their intellectual property, I 
> potted the magic bits of the antenna I sold years ago.  Anyway, to make 
> a loop work without tuning it to a specific incoming signal, you 
> probably need a "tranimpedance" amplifier that converts the current in 
> the loop to voltage on the output.  Such a device will have a very low 
> input impedance, like for instance, the summing junction (- input) of an 
> op amp.  See:  http://www.vlf.it/lowfloop/lowfloop.htm  Problem is, it's 
> difficult to get this working above MF.  I don't think the Dallas 
> Langford circuit is applicable here.  If anybody has any ideas, let's 
> hear them.  Loop antennas have a lot to offer, especially if we don't 
> have to retune when we change frequency.
> 
> Regards,
> Al
> 
> Ken chattenton wrote:
> 
> >HI Alberto, all from Ken in the UK,
> >
> >The number of times I have heard similar comments to yours Alberto regards 
> >duplicating the amp.
> >I know it would be nice to do, but I'm afraid there's no chance really.
> >Guy protects this little unit by 'potting' it in compound ( plastic conduit 
> >box ) and he will not release the circuit dia to anyone, and why should he 
> >after all the research and work he has expanded in it's design.
> >I have never heard anyone complain about the products and support offered by 
> >Guy. A truly professional in every way.
> >
> >
> >  
> >
> >> I know that I am asking almost the impossible. 
> >>    
> >>
> >
> >
> >_______________________________________________
> >
> >
> >
> >
> >  
> >
> 
> -- 
> Al Klase - N3FRQ
> Flemington, NJ
> http://www.skywaves.ar88.net/
> 
> 
> 
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