I have a UHF RCA 500 series commercial repeater that was retuned and crystalled for amateur 440 use. It was used as our first 440 repeater and to my knowledge still works, but it has been off the air in storage for about 2 years.
It has a transmit exciter, PA, and receiver. Photos are online and available for interested persons. I can part this out or sell it as one unit. All offers accepted as it's only taking up much needed garage space right now. If interested, please email me off list at derekjmu at yahoo dot com.