You Can't imagine how many UHF repeaters have Pre Amps most of them 
come from http://www.advancedreceiver.com/index1.html.
That's advancedreceiver dot com Great product.
You should be able to get enough isolation from your duplexer with a 
5 Meg split to use one at UHF.
73
Coy


--- In [email protected], "stanleyradio" 
<[EMAIL PROTECTED]> wrote:
> 
> Does anyone ever consider using a preamp (ARR GaAsFET) on 440 with 
> only a 6-cavity notch duplexer (Cellwave)?  I know that this makes 
> the receiver susceptable to desense from other interference, but 
my 
> site is so extremely remote that my only concern is just keeping 
my 
> own Tx out.  I was just wondering if for an extremely quiet site, 
a 
> bandpass filter between the notches and the preamp is worth the 
added 
> insertion loss.
> 
> Thanks,
> Dayne Olmstead
> KD7JAH







 
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