Jim,
If you remember, there was another ham on the net who did build one like this,
and used your
software to design it. It was a low pass filter for 160 to 6 meters. At the
bottom of the webpage,
he gave you credit for helping him. I can't remember though who it was, and I
didn't save the URL.
If it were me though, I'd rather have a filter with a cut off frequency just
above 10 meters. That will
save any RFI on the low TV channels. That's generally the way most are designed
now. With the
software, it doesn't take very long to design a filter, or it didn't for me. I
think it's really good and
you did a helluva job in writing it!
Best,
Will
*********** REPLY SEPARATOR ***********
On 8/1/06 at 5:08 PM Jim Tonne wrote:
>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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