Thanks Gary. I checked the INRAD site and the
crystal filter plots posted there for filters available for the K3 are similar
to, but slightly different, than the plots posted on Elecraft's site. They
apparently use a program called YADDS Sweeper v3.27. Does anyone know how this
program is utilized in measuring crystal filters? Is the filter measured in the
radio or in a test jig?
Mike, ks7d
Sent: Saturday, January 10, 2009 11:44 AM
Subject: RE: [Elecraft] Origin of 8-pole Filter
Plots
Mike,
Im not an expert on this subject, but I do recall finding the identical plots
on the INRAD website back before the K3 had even gone into production.
Thus, I would ask them this question.
73,
Gary
KI4GGX
Mike
Downs
Sat Jan 10
10:47:20 EST 2009
Does anyone know how the 8-pole filter plots on Elecraft's web site were generated? Are they from a test jig in a laboratory setting, or are they from crystals filters that were installed in a K3 when they were tested? If they were tested in a K3 what test setup/protocol was used to generate the plots? Thanks in advance for any insight that can be offered.
Mike, ks7d
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