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

[Colin Lamb]

A friend has one of those Japanese rigs that emits white noise all over.  We fired up my spectrum analyzer and found it did produce a lot of crap.  No simple cure, and he wanted to use it for Field Day.  I built a couple of mono bandpass filters and they cleaned up the crap.

He used the rig on Field Day, in his own tent, among other operators.  No one complained about him.  But, he complained about the others.  He borrowed my spectrum analyzer and showed them how much crap they were putting out, but no one seemed to care.  As long as he did not bother them, things were good enough.  

Single band filters are great for Field Day.  They might even be good for the big amp.

Colin  K7FM

-----Original Message-----
>From: Jim Tonne <tonne at comcast.net>
>Sent: Aug 1, 2006 2:08 PM
>To: g3rzp at g3rzp.wanadoo.co.uk, Tom W8JI <w8ji at w8ji.com>, mike kendall <ke6cvh at yahoo.com>, amps at contesting.com
>Subject: Re: [Amps] Low Pass Filter capacitor ratings for 1.5kw level
>
>
>Tom said:
>> the voltage can be higher than the input and output voltage
>> depending on the exact filter design.
>
>Peter said:
>> it isn't often recognised that there can be voltage step up in the middle 
>> of the filter.
>
>Same thing, two different ways of saying it, and very true!
>
>About time someone wrote an article on the design of a lowpass
>filter for a single band capable of handling 1500 watts
>continuously, 50 ohms, to allow a transmitter to meet all of the
>various regulatory agencies' specs, cheap, easy and quick to
>build using parts commonly available, with little test equipment.
>
>- Jim, WB6BLD
>
>And it puts the cat out at night and gets me a beer out of the cooler.
>
>
>
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