I have two PLL exciters in service that were moved from the 170 mHz range down into the ham band by only replacing the aluminum slug in the coil with a ferrite slug. One repeater operates at 145.45 mHz and one is at 146.92 mHz. I have seen no degradation due to operating the bandpass filters below the specified range. Normal lock voltage was obtained and the units have operated from ambient 90 deg down to 0 deg with no problems.
I did see a reduction in desense when I replaced the multiplier type exciters with the PLL exciters. 73 - Jim W5ZIT --- On Thu, 1/15/09, Larry <[email protected]> wrote: From: Larry <[email protected]> Subject: [Repeater-Builder] Bandpass Filter Board 19B226748G1 Needed for GE PLL Exciter To: [email protected] Date: Thursday, January 15, 2009, 2:37 AM Hello group, I'm moving a Mastr ll to down to 146 MHz range for Ham use. I'm in need of a 19B226748G1 (138-155 MHz) bandpass filter board for a GE PLL exciter. The filter currently installed is a 19B226748G2 which shows it's for the (148-174 MHz) range. Would anyone on the list have a 19B226748G1 board they would sell or swap for my G2 version. I am aware that the caps and inductor could be replaced to lower the range but prefer a replacement if someone has one. Please email me off list -- [email protected] Larry - N7FM ._,___
