Ed Engelken pointed me to a great article in the February 2005 issue (#189)
of "Electric Radio." It is written by Bill Feldmann and includes a very
sensible explanation of how to align the SX-28 (esp. the crystal filter). In
discussing the SX-28's design, he also mentions a number of differences and
production changes.

Must-read material for any SX-28 owner!

Regards,

Phil Nelson
Phil's Old Radios
http://antiqueradio.org/index.html