[Amps] Johnson 229-0202 roller

[Karl-Arne Markström]

They are rated for 5 A RF, so they operate in the vicinity of their maximum ratings
at the 1500 W level, somewhat depending on loaded Q in the network.

Usually the duty cycle is low enough that heating will not be a major concern.

73/

Karl-Arne
SM0AOM



----- Original Message ----- 
From: "Joe Crawford" <crawfish at surfmore.net>
To: "John Irwin" <crazytvjohn at yahoo.com>
Cc: <amps at contesting.com>
Sent: Sunday, April 03, 2005 8:31 PM
Subject: Re: [Amps] Johnson 229-0202 roller


> I have one that has been used at that power level with no problems.
>                                               Joe W4AAB
> John Irwin writes: 
> 
> > Dudes
> >  
> > A question on the johnson 229-0202 roller inductor.  this unit ,ceramic 18 uh roller inductor.  silver plated
> >  
> >>>Is the wire size on this unit big enough for a pi network roller, at the 1.5 kw level.<<
> >  
> >   I have never even seen a roller inductor outside of photo's.   Your help is needed>
> >  
> > the link below shows a picture of  a unit similar to the one I am considering .
> >  
> >              http://www.surplussales.com/Antennas/TransVarInductor.html
> >  
> >  
> > john kb9tc 
> > 
> > 
> > 
> > ---------------------------------
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