I was just quoting the sales flyer.  I agree that the bandpass curve has 
the typical "knee" shaped bandpass curve instead of the bell shaped 
curve for what I would call a bandpass duplexer.  The only real 
application that I can see for these duplexers would be a mobile 
installation that is operating in the full-duplex mode.  It's 
interesting that they picked 52 and 53MHz on the plot, maybe they were 
targeting the ham market?

73, Joe, K1ike

On 7/5/2010 8:02 PM, Eric Lemmon wrote:
> I see what the sales flyer says, but the response plots show no real
> bandpass action.
>    

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