I think I've answered my own question here.
I built the filter and it doesn't work with 50 ohm input/output impedance,
but it DOES work with 50k ohms.
Narrow isn't it !
I can just about hit the right frequency with a signal generator and see
some sine wave on the scope.
I haven't had a chance to put it on the spectrum analyser yet.
----- Original Message -----
From: "g6tmk" <[email protected]>
To: <[email protected]>
Sent: Friday, September 27, 2002 10:39 AM
Subject: LF: Re: RE: Narrow CW filter using 32kHz clock crstals?
In your recent posting about the 33kHz crystal filter, can you clarify
the characteristic impedance is ...
It is very unusual to specify an impedance in terms of a frequency, so I
feel there must be some mistake.