I'm new to the club. What are MSWE and TARS? JP KG5MBG https://www.qrz.com/lookup
_____ From: BVARC [mailto:[email protected]] On Behalf Of Michael Monsour via BVARC Sent: Sunday, April 03, 2016 12:25 PM To: BRAZOS VALLEY AMATEUR RADIO CLUB Cc: Michael Monsour Subject: Re: [BVARC] build a bandpass filter You buy the thing! I have almost a complete set of Bandpass filters [ minus 30 and 60 meters] most of them are the most expensive kind. I have one which I think is 15 meters which is the cheaper type but it is suitable in the environment for MSWE and Field Day Curves are available from the vendor that shows how effective that they are and if any other bands may leak through As i recall there was one Bandpass filter of the cheaper type that was not suitable as it let one other band through With a good bandpass filter [ the more expensive one] the whole band is usable I have the following filters 160, 80, 40 20 15, 17, 12[?] 10 I may not have 12 meters as MSWE does not operate there They are ONLY available for my MSWE and TARS Field Day But I can bring two examples and take the covers off and see the difference Michael Monsour On Sun, Apr 3, 2016 at 8:40 AM, Travis Burgess via BVARC <[email protected]> wrote: Bob, here is a link to home brew band pass filters. http://www.n1nc.org/Filters/ Travis K5HTB <http://www.n1nc.org/Filters/> The NVARC <http://www.n1nc.org/Filters/> "Ugly" Filter Project 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 _______________________________________________ BVARC mailing list [email protected] http://mail.bvarc.org/mailman/listinfo/bvarc_bvarc.org
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