No problem Jerry. Didn't seem to make much sense hashing out something that was already clarified by the designers. :)
73 Greg On Mon, May 12, 2014 at 9:59 AM, Jerome Sodus <jso...@comcast.net> wrote: > 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
