A contest station probably already has high Q coax filters.
David
G3UNA
>
> From: "Jim Tonne" <tonne@comcast.net>
> Date: 2007/09/05 Wed PM 02:05:53 BST
> To: "Nils Petter Pedersen" <la7sl@online.no>, <amps@contesting.com>
> Subject: Re: [Amps] crossmodulation in PA ?
>
>
> Peter:
>
> As I was reading your note about intermodulation (or
> crossmodulation, the term you used) I thought to myself
> that a simple highpass filter would be needed. Then I
> saw this:
>
> > put high power bandpass filters on all feedlines, but
> > that would be a very expensive project.
>
> So I see you have considered that. But it might not
> require very much filtering; perhaps 10 to 20 dB of
> rejection of the broadcast station would be enough.
> While passing your own signals with no particular
> attenuation, of course. The filter might be as simple
> as a simple highpass Tee or Pi, three elements.
> I can help in the "paper" design.
>
> In lieu of "fixing" the amplifier(s) highpass filtering
> would be the cure.
>
> - JimT WB6BLD
>
>
>
> _______________________________________________
> Amps mailing list
> Amps@contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
>
-----------------------------------------
Email sent from www.virginmedia.com/email
Virus-checked using McAfee(R) Software and scanned for spam
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|