--- In BITX20@..., "pgdaulton" <k5wms@a...> wrote:
... have different shapes. shunt is used for Lsb series for usb.
enjoy!
PAUL DAULTON
PS HIT WRONG KEY AND SENT BEFORE MSG FINISHED
That's was a good article however there have been more written since.
The ARRL publication Experimental Methods In RF design has a far more
complete (for one place) treatment and a complete list of citationas
and references. Worth having. Also BITx traces it's origin to the
EMRFD.
FYI it's possible by selection of values to build a series filter for
either USB or LSB or even symetrical. At 6-8 crystals and symetric
shape using constants for gausian to 6db yeilds a very nice filter.
Allison
