Jason, You definitely should not bypass FL101, because it performs an important function. Although the service manual does not provide any information about tuning FL101, the schematic diagram reveals that it contains four helical resonators that do appear to have tuning slugs which act as variable capacitors. As you have noted, the stock tuning favors the 450-470 MHz band for which the station is designed. I have not done this myself, but perhaps other readers can advise you on the means and method of adjusting FL101 to pass a carrier near 440 MHz. You will likely have to carefully remove the filter cover in order to reach the slugs.
73, Eric Lemmon WB6FLY -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of kc7stw Sent: Tuesday, March 09, 2010 8:49 PM To: [email protected] Subject: [Repeater-Builder] MSR2000 UHF exciter (update) Hello again. So after messing with the exciter. (last post on this topic the exciter only put out .1 mw) The exciter will put out, 300mw to the input of FL101. This is just a simple tune up. But FL101 blocks the RF 'since it seems to be out of range'. Can the filter be re-build, changed, by passed, and a external filter used, etc? Also, at this point. Anyone have a UHF exciter that will play nice at 440.300 that they want to sell? or trade for a exciter that plays nice in the upper 70cm range? Thanks -Jason
