[amsat-bb] Duplexer for Sats

Hello everyone. I've worked AO-51 a few times so I'm not a total newbie. Just joined the list here to ask about building my own duplexer for working the sats. Awhile ago I found a page that described how to build one using a pencil to wind the inductors. It was a really small duplexer using RG-174 and SMC connectors. Does anyone know where I might find this web page? Or have instructions for building a duplexer?

Thanks