Re: Codan Crystal Filter info?

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#2551

From: dougfgd
Date: Sat, 22 Jul 2006 10:44

28 lines
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I  suggest IF filter as a band pass or upper and lower sideband,
termaination will affect the loss and final filter shape slightly at
this frequency try 1.2k with 10pF trimmer. in parallel. Include an
isolating pad .
Jeff wrote:
> Yes.
> "Tam/WB2TT" <t-tammaru@c0mca$t.net> wrote in message
> news:r82dnf87Z5W141zZnZ2dnUVZ_sWdnZ2d@comcast.com...
> >
> > "Jeff" <jeff_164@NOSPAMhotmail.com> wrote in message
> > news:44c12371@clear.net.nz...
> > > Hi,
> > > Ive been trying to locate some basic info on 2 crystal filters...
> > > QF1A65 and QF1B65 made by Hi Q.
> > > They are in a Codan transceiver, so all I know is they are 1650kHz freq,
> > > The Hi Q site doesnt mention them in their support docs.
> > > I really want to know if one of them is an AM filter as this is what Im
> > > after for another Codan set.
> > > Any more info would be appreciated.
> > > JEFF
> > > ZL3JK
> > >
> > >
> > Does the Codan that the filter is in have an AM mode?
> >
> > Tam
> >
> >

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From: "dougfgd@gmail.com" <dougfgd@gmail.com>
Newsgroups: sci.electronics.design,aus.radio.amateur.misc
Subject: Re: Codan Crystal Filter info?
Date: 22 Jul 2006 03:44:28 -0700
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