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On Friday March 3, 2023, two significant upgrades to the KG4MRA repeaters occurred.
The long awaited (~2 years) return to full power TX on 145.430 was implemented, by including a 4th Vari-notch cavity filter in the RX duplexer path, improving isolation and eliminating self desensitization, such that the 250 Watt Henry Power Amplifier has been enabled, returning 145.430 to the full power levels of the old Motorola Quantar repeaters, which delivered ~150 watts. So now, the 145.430 TX is +7 dB from where it was recently with the 50 Watt max output for the DR-2X repeater standalone.
Additionally, the 224.420 repeater, has been upgraded, by replacement of the flat pack 220 MHz duplexer, with a brand new ($1800) TX RX Systems Vari-notch 4 can cavity duplexer, which has notably improved both RX and TX of KG4MRA 224.420. On December 16, 2022, the 224.420 repeater was upgraded from 12 year old Alinco DR-235's to TYT TH-9000D Xcvrs. This doubles the downlink TX power from 25 to 50 Watts. Other upgrades are being considered for this repeater.
PLEASE NOTE: THESE UPGRADES COST THE MRA APPROXIMATELY $4000 THIS YEAR. So if you enjoy and use either of these machines, please be sure to pay your 2024 Dues, and/or make a donation to MRA, to keep the treasury above water. To do so, simply pull a copy of the Membership Application (from this site) and mail your check for $15 (per year) dues, to the NEW MRA address:
Metropolitan Repeater Association (MRA)
P.O.Box 553
Chesterfield, VA 23832
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