MSF5000 Controller Question ? 800 > UHF 450 MHz

[Virg]

I need a CXB controller for a UHF 450 Mhz Repeater... Can I use a 800 Mhz Digital Controller ??? Is there any frequency specific compatibility problems if I do this??

Any help appreciated... or does any one have a UHF CXB controller for sale.... I would even consider a analog version at this point.

Thanks

Virg

[airman1952]

I converted an analog UHF to a digital by using a digital contoller tray form a 800 meg MSF. There are some differences in the squelch circuits, but I absolutely could not tell any difference between my old analog controller and the 800 meg controller. The frequency params can be changed in the RSS. The only thing I had to do was bring 9 volts up the RX2 strobe line from the 9 volt regulator below the RF deck to make the controller work. The analog controller had its own 9 volt source. Where you are just swapping a CX controller with a CX controller, it should be pretty much plug and play. Just need to change programming parameters.
This repeater has been in service for almost 2 years now in this configuaration and my users think it works, and sounds great.

And no, I do not want to sell my analog controller. I keep it for a backup.
Sorry.

Gary

[bernie]

My two bits worth:
There are minor differences between the 800, and UHF CLB controller boards.
The CLB control boards are usuially not too hard to repair, and I have spares, and can make code plugs.

The CLB controller is a direct replacement for the CXB, however it won't support CXB accessories.

The CXB (digital) boards seem to be interchangeable.

The common failure is in the 5V switch power supply.
ALLWAYS replace the original electrolytics in the 5V power supply.

I know of many conversions, but I don't understand why, unless there are some options involved that are best or only handled by a digital control board.

Most repeaters live out their years on only one channel pair, so easy reprogramming isn't an issue with me, also you don't have to lug your computer along on every service call.

If you install an external controller, the audio, and squelch is taken over by the controller, the only thing the control board does is load the operating frequencies on boot up.

[Big Towers]

Hey Bernie, I tried to e-mail and PM you but I got some funny error message so don't know if they went through or not. If not, send me your e-mail and I will try it direct.

Thanks