> Tim Sawyer <tisaw...@...> wrote:
> I need to notch 145.16 out of my receiver. Do you think
> it would tune down that low?
It should... but I can't promise frequency coverage that low.
Consider this duplexer two very nice notches you can put in
the standard VHF High Band range, each just not within a MHz or
two of each other without more serious performance degradation.
I've got more than one similar unit (I use these duplexers all
the time) so maybe it's time to "crank one down" to see how
low the resonators will go without physical modification.
You could to all the notch networks in one "path" side to
a specific frequency and separate the two sides of the
duplexer or use them both for different tasks.
There are many possible applications for these type of
notch-pass duplexers. It's just that everyone wants narrow
600KHz offset packages for conventional ham repeater
operation. But if you need to notch something out, it's hard
to beat the deal or use it for a 152/159 commercial ham
box.
Another cute idea... separate the two paths within the duplexer
for use on a separate tx/rx (dual) antenna repeater. The notch in
the rx side (antenna lead/path) is tuned to the tx frequency
and the converse for the other path.
There are six very useful notch resonator networks in the box
and they can be used in various combination for many things.
s.
> > skipp025 <skipp...@...> wrote:
> > Re: VHF Decibel Duplexer
> >
> > I should probably buy this... or at least bid on it. But I'm
> > making a serious effort to revive my 12 Step Junk Ender's Program
> > participation. So I'll pass this on to one of you to hopefully
> > take advantage of. It's a great Deal for what this is...
> >
> > Ebay Item Number: 150413877464
> > Decibel Products VHF TR Duplexer
> >
> > You're not restricted to using this unit as a duplexer... The
> > circuit is two paths of notch cavities (tuned circuits) so you
> > can get quite creative.
> >
> > You could also use it as a commercial vhf repeater duplexer and
> > or a non-standard offset ham repeater duplexer.
> >
> > good luck,
> > s.
> >
> >
> >
>
>
>
> --
> :wq
> Tim
>
