Re: [Amps] What am I missing....balun

[John G3UUT <amps@grebe.plus.com>]

Hang on a minute, lets think about this.  I built a balun using one of 
these cores or similar and needed 14 turns to get sufficient loss on 1.8 
MHz.  This one has 2 turns but has 6 cores so it may not be far off.
73 John G3UUT

On 17/02/2017 14:23, Jim W7RY wrote:
> A design prototype?  Not disclosing the true amount of windings of a 
> production model?
> 73
> Jim W7RY
>
>
> -----Original Message----- From: Jim Brown
> Sent: Thursday, February 16, 2017 12:31 PM
> To: amps@contesting.com
> Subject: Re: [Amps] What am I missing....balun
>
> You're not missing a thing, Jim!  This emperor has no clothes.
>
> 73, Jim K9YC
>
> On Thu,2/16/2017 9:58 AM, Jim Thomson wrote:
> > https://www.arraysolutions.com/index.php?_route_=as-50-1din-20k
> >
> > What am I missing here ?   Appears to be 2 turns through  6 x type 31 
> > cores.
> > These are standard 2.4 inch OD cores.   Coax is just  RG-393. The mess
> > of caps on the balanced end is to tune out the xl of the threaded brass
> > material used to go through each insulator.   Rated for 20 kw cw, and 
> > 40 kw ssb,
> > from 1.8  to 30.0 mhz.   12 x 6 x 4 inch nema box.  Box appears to be 
> > aluminum.
> > I cant fathom how this would have enough Z or RS to be effective on 
> > any band, maybe
> > 10m.
> >
> > Jim  VE7RF
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