Can anyone ID this RF amp module?

[Opcom]

This is a 70cm amp, maybe useful for ATV which is AM and requires linearity.. It's from some old transceiver, pretty old, the transistors are MRF309s, a 50W output 28V transistor. It's a ham conversion or just maybe encasement of the amp in a desktop box. A 12V power supply is with it.

Does anyone recognize this thing and could say what it's from? Would it normally run on 12V or 24V? I want to know before trying to fire this up, needs a lot of cleaning.

Sorry about the bad picture, I need a different camera, cellphone was bad. Should I find a number on the board somewhere?

[w4bfs]

hi Patrick ... looks like old station eq to me .... contact Herman N4CH .... bet he knows ...

[kb2vxa]

It looks similar to the Motorola 5W in 50W out 155MHz amp I picked up at a hamfester and re-tuned for 2M once upon a time. Being Class C it worked just fine for boosting an HT used on packet which makes me wonder if that thing is linear. Oh it's 12V alright, everything needs a little headroom, so to borrow an Oz expression, taste it and see.