Re: [Amps] 5 kw amps -- why?

["Peter Frenning, OZ1PIF" <oz1pif@privat.dk>]

----- Original Message ----- 
From: "R. Measures" <r@somis.org>
To: "Peter Frenning, OZ1PIF" <oz1pif@privat.dk>
Cc: "'Barry Kirkwood'" <bjk@ihug.co.nz>; <amps@contesting.com>; "hermans" 
<on4kj@skynet.be>; "'Rob Atkinson, K5UJ'" <k5uj@hotmail.com>
Sent: Wednesday, October 20, 2004 7:33 PM
Subject: Re: [Amps] 5 kw amps -- why?



On Oct 20, 2004, at 8:08 AM, Peter Frenning, OZ1PIF wrote:

> Unlike beautiful women you CAN make a both beautiful AND usable Balun 
> yourself - take a 35mm or bigger 4C65 core and a length of RG400 Coax; 
> wind as many windings on the core as will fit (8 will do nicely from 160m 
> to above 10m) and fit the whole thing into a Marine Quality junction box 
> equipped with a PL socket, and three stainless steel eyebolts, and you'll 
> have a pleasing wetherproof 1:1 balun that'll last a lifetime and carry 
> legal limit almost indefinitely...

Peter --  The drawback is only being able to carry 1500W-pep.  Ugly
baluns can easily do 10db more.

Rich -- No problem, then you just use the next larger size PFTE Coax (can't 
remember the RG designator)
and a larger core + of cause a box to fit  :-))
> This is what carry my HB W3DZZ into the air.....
>
> Vy 73 de OZ1PIF, Peter
>
> **********  OZ1PIF **************
> email: oz1pif(no-spam-filler)@privat.dk
> http://home24.inet.tele.dk/oz1pif/
> Ph. +45 4619 3239
> Snailmail:
> Peter Frenning
> Ternevej 23
> DK-4130 Viby Sj.
> Denmark
> ***********************************
> ----- Original Message ----- From: "hermans" <on4kj@skynet.be>
> To: "'R.Measures'" <r@somis.org>; "'Barry Kirkwood'" <bjk@ihug.co.nz>
> Cc: "'Rob Atkinson, K5UJ'" <k5uj@hotmail.com>; <amps@contesting.com>
> Sent: Wednesday, October 20, 2004 4:51 PM
> Subject: RE : [Amps] 5 kw amps -- why?
>
>
>
>
> -----Message d'origine-----
> De : amps-bounces@contesting.com [mailto:amps-bounces@contesting.com] De
> la part de R.Measures
> Envoyé : mercredi 20 octobre 2004 16:34
> À : Barry Kirkwood
> Cc : Rob Atkinson, K5UJ; amps@contesting.com
> Objet : Re: [Amps] 5 kw amps -- why?
>
>
> On Oct 19, 2004, at 11:44 AM, Barry Kirkwood wrote:
>
> > Well, I manged to fry a "1500W "  commercially made ferrite balun with
>
> > significantly less than 1500kW out, let alone 3kW plus.
>
> The ferrite used in commercial HF baluns typically has a mfg.'s max
> freq rating of 500KHz to 1MHz.  However, since balun mfg.'s usually
> test their products at <5w, they have no idea that there could be a
> problem.    My disillusionment with ferrite baluns began when I
> discovered that my 7MHz signal had harmonics above 500MHz that were
> strong enough to wipe out UHF line-of sight TV stations.
>
> > Since then have lived in peace with my homebrew coax solenoid baluns.
>
> Amen, Barry.  Beautiful baluns are like unto beautiful women.
> *******************************************
> Bad tongue ON
>
>
> THEY ARE VERY EXPENSIVE AND RUN AWAY VERY QUICKLY.......
>
> Bad tongue OFF
>
> Jos on4kj
> *******************************************
> Richard L. Measures, AG6K, 805.386.3734.  www.somis.org
>
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Richard L. Measures, AG6K, 805.386.3734.  www.somis.org



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