----- Original Message ----- From: "n3hkn" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Monday, January 07, 2008 10:00 PM Subject: [soft_radio] Re: hybrid?
> > I would be interested in how bad the spurs are from using the DDS VFO. > Typically the simplistic digital VFOs produce significant spurs which > show up on the PC display making it difficult to see signals that are > equal to, or lower in strength, than the spurious signals. > > I have onr of Tony's Lite receivers as an IF on my old Kenwood > TS-520S. There is no noticeable change in normal performance with the > Softrock Lite permanently in place. I tapped off just before the > 2.5khz xtal filter and fed directly to the normal Softrock antenna > input. On receive I now have performance similar to the very expensive > radios as well as a roofing filter (pre-selector) same as the big boys. A preselector isn't the same as a roofing filter. The latter is a first IF filter (usually at VHF) in an up-converting Rx. Leon -- Leon Heller Amateur radio call-sign G1HSM Yaesu FT-817ND and FT-857D transceivers Suzuki SV1000S motorcycle [EMAIL PROTECTED] http://www.geocities.com/leon_heller
