At 10:06 AM 11/23/08, you wrote: >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. :)
I'd start by leaving the existing cables alone, and adding a good quality (Kings or Amphenol) "N" right angle (elbow) adapter to one or both ends to lengthen it. Or for more length, a M-M and an F-F adapter end to end. Add the "stretcher", see how it tunes. Note that I am not suggesting that you use this trick for permanent use, just to see how the hardware reacts. On the other tentacle.... I do remember hearing about one system that had a Sinclair duplexer that had an elbow on one or both end(s) of each inter-cavity cable. It's been over 15 years since the conversation in question and details fade. When asked the system owner stated that the duplexer was made with two different harnesses, and the difference was just about the length of an elbow. And that adding a few elbows was cheaper than purchasing a whole new harness. And that the unit he had (with the high frequency harness plus the elbows) met all of the factory specs for a unit with the low frequency harness. You can't argue with success. Mike WA6ILQ
