Re: [IRCA] Cable work

[Russ Edmunds <wb2bjh@xxxxxxxxx>]

--- Rick Kunath <k9ao@xxxxxxxxxxx> wrote:

> On Sunday 26 August 2007 11:54:17 am Gil Stacy wrote:
> > A simple way to determine that would be to
> > lay the transformer on top of the box rather than inside of it. 
> Good luck.
> 
> As another interesting test, I'd like to see what happens with no box
> around 
> the transformer and a sleeve-type choke on the feedline at the
> antenna 
> connector end.
> 
> One way or another, the idea is to keep the common mode currents on
> the 
> outside of the shield from getting on the inside surface.
> 
> It would be interesting to see what the differences in effectiveness
> of the 
> box vs sleeve-type choke might be.
> 
>

FWIW, I tried several of the RS chokes on my CRT PC monitor cables (
and anywhere else I could find ) to stop monitor noise from getting
into my loop located about 6-8 feet away with a very marked lack of any
impact at all. I've therefore developed a rather healthy distrust of
them. 



Russ Edmunds
Blue Bell, PA ( 360' ASL )
[15 mi NNW of Philadelphia]
40:08:45N; 75:16:04W, Grid FN20id
<wb2bjh@xxxxxxxxx>
FM: Yamaha T-80 & Onkyo T-450RDS w/ APS9B @15'
AM: Hammarlund HQ-150 & 4' FET air core loop


       
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