Bob, here is a link to home brew band pass filters. http://www.n1nc.org/Filters/
Travis K5HTB [http://www.n1nc.org/logo96x74]<http://www.n1nc.org/Filters/> The NVARC "Ugly" Filter Project<http://www.n1nc.org/Filters/> www.n1nc.org 1 For those that may not be into the mathematics of electric filter design, Butterworth and Chebyshev refers to the mathematician who's polynomial expressions ... ________________________________ From: BVARC <[email protected]> on behalf of Bob Hawkins via BVARC <[email protected]> Sent: Sunday, April 3, 2016 8:13 AM To: BRAZOS VALLEY AMATEUR RADIO CLUB Cc: Bob Hawkins Subject: [BVARC] build a bandpass filter I want a 20 meter bandpass filter. Should I buy off the shelf or build? Do off the shelf filter come pre-tuned to center of the band? If I build, is an oscilloscope the only way to tune a bpf? Bob H KD5AT
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