[Amps] 5 kw amps -- why?

[R.Measures]

On Oct 20, 2004, at 3:12 PM, Peter Frenning, OZ1PIF wrote:

>
> ----- Original Message ----- From: "R. Measures" <r at somis.org>
> To: "Peter Frenning, OZ1PIF" <oz1pif at privat.dk>
> Cc: "'Barry Kirkwood'" <bjk at ihug.co.nz>; <amps at contesting.com>; 
> "hermans" <on4kj at skynet.be>; "'Rob Atkinson, K5UJ'" <k5uj at 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  :-))

It's cheaper to wind coax on ABS pipe and the air core won't saturate.
>>
>> 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 at skynet.be>
>> To: "'R.Measures'" <r at somis.org>; "'Barry Kirkwood'" <bjk at ihug.co.nz>
>> Cc: "'Rob Atkinson, K5UJ'" <k5uj at hotmail.com>; <amps at contesting.com>
>> Sent: Wednesday, October 20, 2004 4:51 PM
>> Subject: RE : [Amps] 5 kw amps -- why?
>>
>>
>>
>>
>> -----Message d'origine-----
>> De : amps-bounces at contesting.com [mailto:amps-bounces at contesting.com] 
>> De
>> la part de R.Measures
>> Envoyé : mercredi 20 octobre 2004 16:34
>> À : Barry Kirkwood
>> Cc : Rob Atkinson, K5UJ; amps at 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
>
>
>
>
>

Richard L. Measures, AG6K, 805.386.3734.  www.somis.org