I can't change any of the cables on the harness without cutting or un crimping the n connectors. I do not know the age of the duplexers unless there is a date stamp on them that i don't know about. I sent a email to Sinclair. I got a response from them, they also sent me a different manual on the tuning and installation. In that email I was told to try and tune them down. That they may work, but just not to specs. In this manual it talks about course tuning the notch filter by rotatable loops, then fine tune with the capacitor. My conclusion is to change the harness before I start tuning. Now to find a way to make the harness. Time to start getting good at putting on N's. :)
--- On Sun, 11/23/08, Jim Brown <[EMAIL PROTECTED]> wrote: From: Jim Brown <[EMAIL PROTECTED]> Subject: Re: [Repeater-Builder] Sinclair q202gc duplexers To: Repeater-Builder@yahoogroups.com Date: Sunday, November 23, 2008, 12:29 PM Jason, if your duplexer is one of the older units using a dielectric rod to tune the notch, here is the manual: http://www.repeater -builder. com/sinclair/ q202-208- 218-tuning. pdf I have moved four of these duplexers down into the ham band by changing out the cable that goes from the cavity to the Tee from the old 10.5 inch dimension to new cables measuring 12.5 inches. The cavity tuned down from 170 mHz to the ham band just fine, but the notch would not work until I changed the cable dimensions. My duplexers were all cabled with RG-213 from the factory and I used RG-214 to replace the cables. I did not replace any of the other RG-213 cables in the harness. 73 - Jim W5ZIT --- On Fri, 11/21/08, kc7stw <[EMAIL PROTECTED] com> wrote: From: kc7stw <[EMAIL PROTECTED] com> Subject: [Repeater-Builder] Sinclair q202gc duplexers To: Repeater-Builder@ yahoogroups. com Date: Friday, November 21, 2008, 10:03 PM I am new to the sinclair line of duplexers. I have a set of used vhf duplexers setup in the high vhf range. current freqs are 165.2375 and 165.1375. Has anyone had luck changing the coax harness to the longer 36cm and getting the duplexers to tune down to the two meter band? Thanks -Jason ,_._,___
