Walter, that same chip could easily be built up on a small circuit board to give a 2175 notch, with a very sharp response. Could probably build one up for $20 or so.
Joe --- On Thu, 9/18/08, ka1jfy <[EMAIL PROTECTED]> wrote: From: ka1jfy <[EMAIL PROTECTED]> Subject: [Repeater-Builder] Re: CTCSS highpass filter paper To: Repeater-Builder@yahoogroups.com Date: Thursday, September 18, 2008, 3:17 PM Not real interested in a PL filter, but my agency [hello Joe M] would be REAL interested in a commercial version of the notch filter. We currently put either a Vega passive [$150] or Midian active [$60] 2175 notch in every repeater we build up. Walter KD7BJJ Phoenix, AZ --- In Repeater-Builder@ yahoogroups. com, Kevin Custer <[EMAIL PROTECTED]> wrote: > > All, > > Reference : http://www.mix- sig.com/Msi5data 12.pdf > > Repeater Builder (the company) may be interested in building this up and > making it available as a add on unit. We had looked at this some time > ago, but felt the concept was not understood by our community to the > degree that the product would be very successful. We have found that > education of the folks interested in the AP-50 has been a challenge at > best. Sure, better sounding repeaters has resulted since the release of > this little device, but I doubt we'll ever sell enough to make it worth > the effort of getting it all together and making it available to the > general builder. > > How many of you would really buy a PL filter like this?