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Re: [Amps] Low Pass Filter capacitor ratings for 1.5kw level

To: tonne@comcast.net, amps@contesting.com
Subject: Re: [Amps] Low Pass Filter capacitor ratings for 1.5kw level
From: "Will Matney" <craxd1@verizon.net>
Reply-to: craxd1@verizon.net
Date: Tue, 01 Aug 2006 20:57:40 -0400
List-post: <mailto:amps@contesting.com>
Jim,

Yes, that's the one I was thinking of, I just couldn't remember where I seen it 
at!
I think the design is a good one, and it's sure well made. For everyone, the 
cutoff 
starts after 6 meters, so keep that in mind. If you want cutoff after 30 MHz, 
use the design, but change the component values. The software makes it easy.
Using a filter after the transceiver is a good idea along with the one behind 
the amp.

Best,

Will

*********** REPLY SEPARATOR  ***********

On 8/1/06 at 8:43 PM Jim Tonne wrote:

>About lowpass filters for a 1.5 kW transmitter:
>
>It might be advisable, IF you have the potential for TVI,
>to make a lowpass (or bandpass) filter for the transmitter
>and then follow it another filter which is especially designed
>to have zero lead-length in the shunt capacitors to ground.
>This will insure good stopband performance up in the 100
>MHz region and above.  A fine example of what I am
>talking about (with pictures!) is here:
>http://www.realhamradio.com/DC_54_mhz_lowpass_filter.htm
>
>- Jim WB6BLD
>
>
>
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