You should be able to work with a combination of the two manuals found on the sonic web page... http://www.radiowrench.com
The UHF Repeater Manual has a lot of the RXR Information and the vhf mobile manual has a lot of the proper rf for your unit. There are variants such as your "SP" (special production) label says your amplifier is one of... but they all follow a theme. Some of the details for special version amplifier might be a hybrid amplifier input for low drive, but I wouldn't expect anything rocket science new to be installed. I'd probably get on the the horn (telephone) to TPL and ask if they can supply one. Otherwise you're doing right to ask around. cheers, skipp
