Re: [Elecraft] OT mechanical v crystal filters OT

Off Topic but with so much expertise flying around I thought I would ask how mechanical filters compare with crystal filters. I think they were fairly low in frequency (455kHz?), so, not suitable in the present discussion, but it would be good for our education at least. David G3UNA

RE: [Elecraft] OT mechanical v crystal filters OT

John, Please describe the quadrature phasing part of your receiver. On weak signals, I often find narrower filter settings of the K2 make the signal harder to copy. Part of that might be my bad hearing and the higher pitch sidetone I like... The noise and the signal seem to blend into one

RE: [Elecraft] OT mechanical v crystal filters OT

Hi Brett. John, Please describe the quadrature phasing part of your receiver. In general terms, the design is very similar to quadrature phasing receivers used for SSB operation, except that since the bandwidth in this case is very narrow, the 90 degree audio phase shifting network becomes

[Elecraft] OT mechanical v crystal filters OT

Off Topic but with so much expertise flying around I thought I would ask how mechanical filters compare with crystal filters. I think they were fairly low in frequency (455kHz?), so, not suitable in the present discussion, but it would be good for our education at least. David G3UNA

RE: [Elecraft] OT mechanical v crystal filters OT

: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of David Cutter Sent: Monday, May 07, 2007 1:43 PM To: Elecraft Subject: [Elecraft] OT mechanical v crystal filters OT Off Topic but with so much expertise flying around I thought I would ask how mechanical filters compare with crystal