Hey - I thought we were talking about the standard osc/multiplier exciters for VHF. The only thing I have ever had to do to move a PLL exciter down into the ham band is replace the aluminum slug in the PLL coil with a ferrite slug. My installs are non temperature controlled and the temps range from -10 to about 100 deg F. No problems with maintaining a lock over that range, but the exciter was optimized at room temp for the correct lock voltage on only one frequency. The applications have all been repeaters with no frequency switching.
I understand that some component values are changed for a factory change in frequency from commercial frequencies down into the ham band, but I have not had to make any changes other than the slug change when converting a 66 range PLL exciter. 73 - Jim W5ZIT --- On Sun, 3/22/09, Kris Kirby <[email protected]> wrote: From: Kris Kirby <[email protected]> Subject: Re: [Repeater-Builder] Master II station 66 split conversion to 56 split To: [email protected] Date: Sunday, March 22, 2009, 5:40 PM On Sun, 22 Mar 2009 [email protected] wrote: > >I have retuned 10+ GE Mastr II exciters - base/moble and have never > >had to change a component. Put the ICOM in for the new frequency and > >tune per the manual. > > Same experience here, except that if you want to put one on the > 144.390 APRS frequency you may find that some exciters don't quite > make it down that far. What sort of temperature coeffiecent does the exciter have? If I want to find the limits of lock, do I need to freeze it or heat it up to 140 degrees? -- Kris Kirby, KE4AHR Disinformation Analyst
