At 4/5/2004 10:43 AM, you wrote:
>Yes, about a year ago I designed and built a
>clipper/LPF board that works great. Then I bought 4
>new (to me) companies and have been busy with that. I
>have about a dozen of the boards ready to stuff, but I
>don't have the time to do it (probably takes 30 min
>per board).
>
>I have the first one I built running on the local 2M
>machine here, sounds great. These use adjustable
>"brick wall" type filters that are tunable with a pot
>from about 2500 Hz to 5000Hz cutoff freq. When set to
>3300 Hz or higher, they seem to sound "transparent". I
>suppose for links you might want them set at 4 to 5
>Khz. The filter is very flat from about 50 Hz to .9
>Fc. At Fc it is 3 dB down, and above that it drops
>really fast.
>
>Joe
Joe, 2 questions:
-How many poles is the LPF, & of what design (Butterworth, Chebyshev,
elliptical?)
-Would you be interested in selling the bare boards/parts as kits? If not,
could you share the schematic with us? A friend of mine has an exciter
that needs brick-wall LP filtering due to adjacent-channel issues & would
like to get his exciter up & running soon. Thanks.
Bob NO6B
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