Thank-you, Greg. Excellent.
Jerry KM3K _____ From: Greg [mailto:a...@cablespeed.com] Sent: Monday, May 12, 2014 12:52 PM To: Jack Brindle Cc: Jerome Sodus; elecraft@mailman.qth.net Subject: Re: [Elecraft] [K3] Roofing filters are misunderstood http://www.elecraft.com/K3/Roofing_Filters.htm On Mon, May 12, 2014 at 9:45 AM, Jack Brindle <jackbrin...@me.com> wrote: Jerry, Why do you say it has been corrupted? This is exactly the purpose for the Roofing Filters in the K3. Jack B, W6FB On May 12, 2014, at 9:33 AM, Jerome Sodus <jso...@comcast.net> wrote: > Hello Bill, > The term "roofing-filter" made sense back in the 1980's when I designed > roofing-filters at 70 MHz. > Bandwidths would be in tens of KHz. > The purpose then was to protect downstream circuitry by rejecting very > strong out-of-band signals that could cause overload; selectivity was not > the purpose. > Selectivity was done further downstream. > So the term has become corrupted over the years. > 73 Jerry KM3K ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
