[Amps] corona on a quad

[Máximo EA1DDO_HK1H]

Sorry, the link for the datasheet;

http://www.rfparts.com/pdf_docs/AndrewHeliax/LDF7-50a.pdf

http://www.rfparts.com/pdf_docs/AndrewHeliax/LDF7-50a.pdf



                                               


> From: df3kv at t-online.de
> To: amps at contesting.com
> Date: Fri, 13 Jul 2012 11:16:02 +0200
> Subject: Re: [Amps] corona on a quad
> 
> Fibreglass is a very poor isolator, especially when wet.
> It turned into flames at the 1KW level already when I used it at a high
> impedance point.
> 1 5/8" cable is rated for 32KW at 30MHz permanent power and a 40°C environment
> temperature.
> If you need special care there is something else wrong.
> 
> 73
> Peter, DJ7WW
> 
> 
> 
> -----Original Message-----
> From: amps-bounces at contesting.com [mailto:amps-bounces at contesting.com] On
> Behalf Of Máximo EA1DDO_HK1H
> 
> The power issue is always happening in the quad´s corners, on driver and
> directors, burned!! 
> Now is not burnng any more, after use Teflon corners over ceramic insulators
> (yes, with +40 Kw fibreglass is not isolating anymore).
> 
> Coax cable is Heliax 1 5/8, but needs special care as well. since it is not
> rated to that power.
> nfo/amps
> 
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