[Central-Electronics] Re: [Amps] Central Electronics 600L

[WYsixK]

Thanks Ken!

--- "Kenneth D. Grimm, K4XL" <kgrimm@adelphia.net> wrote:
> >Does anyone here know how the 600L broadband amp worked?  I don't
> mean
> >"pretty good" or something like that.  I mean what was the theory of
> >operation?  How did they get it to be broadband?
> 
> I've been reluctant to answer your question, hoping that someone who
> really knew how to produce the broadband couplers that are used in
> the
> 600L would speak up.  Since no one has, I'll just say that the
> couplers
> are the secret to the broadbanding of the 100V, 200V and 600L.  As I
> understand it, the coils were wound in a "special" way and a patent
> was
> issued covering the technique.  It was apparently more "art" than
> "science," however, as I've heard that during production there was
> only
> about a 50% success rate in getting the couplers to work to specs.
> Katashi Nose, KH6IJ (SK), attempted to wind coils for the 100V
> exciter
> and was unable to replicate the broadband characteristic of Joe
> Batchelors "broadband couplers."
> 
> Central Electronics took their secret very seriously.  When the 100V
> first came out,  there was considerable curiosity about the nature of
> the coils.   They were potted and, it was said at the time, that if
> you
> tried to disassemble and "reverse engineer" the coil you were certain
> to
> destroy the coil.  You were then up the proverbial creek as it was
> also
> said that CE would not sell you a new one!   The cost of a
> replacement
> coupler was the cost of a new 100V!
> 
> In his article about the 100V and 200V transmitters published in
> Electric Radio some time back, Charlie Talbott, K3ICH, indicated that
> he
> had copies of the original patents and instructions on how to
> construct
> the couplers and would make them available for $5.  If all else
> fails,
> you can probably still get a copy from him.
> 
> If anyone else has anything to contribute, please speak up!
> 
> 73,
> Ken K4XL
> k4xl@arrl.net
> *** BoatAnchor Manual Archive ***
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> 
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