I have a Wacom model WP-652 duplexer with what I hope is a minor easy to fix problem. Three out of the four cavities are operating correctly with a classic BpBr curve on the tracking generator. The fourth (it is the high frequency input cavity normally connected to the transmitter on this band), exhibits a curve that as near as I can describe it is missing the notch. If I loosen the connectors and wiggle them, I can sometimes get the correct curve to show. I have loosened and inspected the tuning stub on the side and see no visible damage. After reassembly, no change was noted. The overall performace of the duplexer is not bad, and would probably work with reduced isolation.
I'm not sure where to go from here. I don't know how to inspect the internal matching loops for damage. I also don't know how to disassemble the cavity for possible repair. Has anyone repaired a Wacom duplexer? Is there anyone supporting them? Any ideas? -- Keith McQueen [EMAIL PROTECTED] 801-224-9460
