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 > > > -----Original Message----- > From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Bill > Turner > Sent: Monday, May 12, 2014 1:07 AM > To: elecraft@mailman.qth.net > Subject: Re: [Elecraft] [K3] Roofing filters are misunderstood > > ORIGINAL MESSAGE: (may be snipped) > > On 5/11/2014 7:25 PM, Fred Jensen wrote: >> I too think roofing filters are really not well understood. > > REPLY: > > A large part of the misunderstanding is due to the name. Whoever chose > the name "roofing" did a great disservice. A better name would simply be > it's function: 1st I.F. filter. > > That's what it is and that's what it does. > > I have always thought that "roofing" was a marketing ploy to imbue it > with some kind of magical powers. > > 73, Bill W6WRT > > ______________________________________________________________ > 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 jso...@comcast.net > > ______________________________________________________________ > 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 jackbrin...@me.com ______________________________________________________________ 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
