actually loading coils were to reduce overall loss by helping to cancel the line capacity before amplifiers 1000 cycles was the frequency passed with best loss Characteristics,,,, the phones were designed to emphasise that frequency "whats that you say " making phone calls werent for sissies
Bob K3DJC On Mon, 31 Mar 2014 10:52:13 -0400 "George Danner" <gdan...@windstream.net> writes: > One of the things that Bell Labs found in adding loading coils to > phone > lines (to reduce the high frequencies) was that in an audio system > if you > reduce the high frequencies then you needed to also reduce the low > frequencies to keep the intelligibility constant. ______________________________________________________________ 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
