Greetings: I have heard that unless a receiver has 455 kHz I.F.s, getting mechanical filters are pretty much out, as they do not make them for other I.F. frequencies. I guess Crystal filters are more available for different frequencies. In checking the specs on the SPR4, I find the 1st IF is a Crystal filter (2.4 khz)at 5645 khz and the second IF is 50 khz (L/C), much like the R8 that has the L/C filters. My old Hammarlund SP-600 had crystal filters, but also had crystal phasing, which I wish the SPR4 had. The Notch works well, but with Crystal phasing it would be nicer. Could crystal phasing be added to the SPR4? Would it be easy to add? Anyone know?
73, Patrick Patrick Martin KAVT Reception Manager _______________________________________________ IRCA mailing list [email protected] http://montreal.kotalampi.com/mailman/listinfo/irca Opinions expressed in messages on this mailing list are those of the original contributors and do not necessarily reflect the opinion of the IRCA, its editors, publishing staff, or officers For more information: http://www.ircaonline.org To Post a message: [email protected]
