Info on the Powerwave MCPA
This amplifier was sold in LARGE quantities to Nortel and used in AT&T Wireless and other smaller cell systems, until recently when the entire analog and TDMA systems were shut down.  It was also sold under the Powerwave name in an almost identical configuration.

  There are a TON of small screws in this thing that need to be removed if you want to completely disassemble the unit to get the good stuff out. 
  To see the "goods", remove the 32 screws holding the lid on the main amplifier module as shown below.  The opposite side has a low power amp with a row of screws going down the middle  Don't worry about that one right now, it is a class "A" 20W amp with 56db of gain!!!  The main high power unit only has screws around it's perimeter..
The good stuff!! Four parallel amps, three stages.  The final devices are SRF7053.  Can't find any datasheets on these, If you can, PLEASE email me with the info!  They are good for between 75-100W each!  I have never pushed one of these amps to their limit, but my Astron VLS-25 ran out of current at 250W output with less than 500mw drive @ 28V!!
Once open, it is easy to see what to connect to.  Everything is labeled.  +26V main power and 5V (bias).  There is also an orange wire on the lower right.  This is either relative output or reflected power.  Not sure.  The other red wire is connected to a thermal overload sensor and from that to ground.
If you want to keep this amp module in the case so you can use it with the "push me pull you" fans and a high duty cycle at high power, it will be difficult to get to the SMA RF connectors inside, but it can be done.
This is what the removed high power amp looks like.  The 9V battery is for size comparison.

Not very big considering how much power it will put out!
To get this out and away from the rest of the case and parts will take you a while!  There is a lot of stuff in these amps.  There is a lot of good stuff too!  There are some small 5W chips good to close to 1.2G, some 1/4" rigid hardline with N connectors at each end, combiners, coax etc.
I have never tried these at 927, but there is some tuning in there you can try to peak it up if you like.  They work fine at 902 SSB!  I'm guessing if it is good for 300-400W at 900, it should be fine at 200W at 927 continuous with good airflow.