[Milsurplus] Possible repair of WJ-8731A

[Skywarrior]

Hi All,would there be anyone willing to take a look at my Watkins-Johnson WJ-8731A receiver. It has 2 tuners installed, one ranges from around 80-300 MHz the other about 250-500 MHz. The radio originally came from the Canadian equivalent of our FCC and had some minor mods, but they are not of issue here.
The radio has work beautifully and the VHF tuner section still performs well, however the UHF tuner recently went deaf and the volume level dropped significantly. 
I would really like to get this thing back to life is anyone has the desire and knowledge to go over it. I am quite willing to compensate for the time needed.
Thanks in advanceBruceK7NXX
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