Steve, I happen to have a Johnson CR600 repeater on the air at 443.975. I think it is a pretty good desktop repeater as compared to Uniden, Standard, etc. It actually was not manufactured by Johnson. It was contracted out to Repco to manufacture in the late 80s. The raido is crystaled however it uses ovens so you can just buy rocks and drop them in. It tunes up well into the ham band and has a relitively sensitive receiver. The duplexer is a 4 can notch manufactured by Phelps Dodge or Celwave depending on when it was made. The controller is very simple - it contains options for dual tone boards and has built in adjustable time out timer and hang time. There is a squelch control on the control bord independant of the one on the front and also a provision for an optional accessory connector. I do have a copy of the service manual and I can try to get scans of it. Also the repeater is capable of up to around 25 to 30 watts output but as with any compact repeater it is better to run it around half power.
James n0qzv ====================================================== --- In [email protected], "stephenucedu" <[EMAIL PROTECTED]> wrote: > > Does anyone have experience, or an opinion about, the EF Johnson CR600 UHF repeater? We > may want to incorporate a low end UHF repeater into our system, but we don't want > something that is/was known for problems. > > A second question involves its programming. Is it PC based or what? I assume if so then the > software is out there somewhere. > > > steve > > KB3OKL Repeater >
