[Jbaker]

Hello.  I am working on a model 90 SN B00086. It has a single 47 output tube and a 4 gang tuner.  The chassis has a capacitor block that is not shown on the component placement diagram.  I haven't been able to find any information on the part circled in red.   

The serial number for my radio appears to fall in the range of serial numbers for model 90s with 2- #47 output tubes.  I physically confirmed there is only 1 #47 tube.  Any help identifying the circled part would be greatly appreciated.  

Thanks - Jim