Info on the bandpass cavities in question:

http://www.repeater-builder.com/db/db-band-pass-cavity-filter-installation-and-tuning-instructions.pdf



----- Original Message ----- 
From: "Mathew Quaife" <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Sunday, December 26, 2004 4:35 PM
Subject: Re: [Repeater-Builder] Re: 2 Meter VHF Preamp


>
> Well I did find some stuff on it, but as I mentioned, duplexers and the
> cavities are all new to me, as I have never done them myself, as the set I
> have on the 2 meter repeater was tuned for me when I bought them, and the
> 440 was done better than 15 yrs ago.  But that is what I thought, but from
> reading the information on the duplexers, as in RX kills TX and 
> vica-versa,
> thought I had better ask.  Thanks for the help.
>
> Mathew
>
> 






 
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