--- In [email protected], "Eric Lemmon" <[EMAIL PROTECTED]>
wrote:
>
> The names are somewhat misleading, because the bandpass effect is
relatively
> modest, although the notch is quite sharp. It is a good idea to
have a pure
> bandpass cavity or two between the duplexer and the receiver,
especially if
> you have a preamplifier.
Eric, I agree with that. Since the bandpass effect is so modest, and
since an additional bandpass cavity or two will probably be needed
anyway, why are BpBr duplexers considered to be so important at a busy
site, compared to say- a notch duplexer??? It seems notch duplexers
are automatically considered to be almost a useless item when the
subject of duplexers is discussed here, and should (almost) never be
used. The additional loss of that pass cavity is nil. Comments Eric
or anyone?
Laryn K8TVZ
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