I have done the heliax duplexer as well...  info is here
<http://65.173.252.47/Six_Meter_Heliax_and_Helical_Duplexer_info/6m_du
plexer_page.htm>

mike

--- In [email protected], "John Transue" 
<[EMAIL PROTECTED]> wrote:
>
> Alexandre,
> 
>   I made some cavities for a six-meter duplexer. The cavities are 
notch
> filters. There is a web site on the subject. Just do a Google 
search on
> "six meter duplexer".
> 
> John
> 
>  
> 
> -----Original Message-----
> From: [email protected]
> [mailto:[EMAIL PROTECTED] On Behalf Of Alexandre 
Souza
> Sent: Thursday, May 15, 2008 10:11 AM
> To: [email protected]
> Subject: [Repeater-Builder] Home-made ressonant cavities?
> 
>  
> 
> 
> Anyone into homemade ressonant cavities? These are hellish 
expensive in 
> Brazil, I'd like to give a try on building one. Anyone experienced? 
Tips
> you 
> want to share?
> 
> Thanks
> Alexandre Souza
> PU1BZZ 
> 
>  
> 
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