What is this Modification?
 

Look on the right side (viewed from rear) of the chassis, someone added a box with capacitors in it for what purpose? Ballast substitute, Filter replacement? ???

http://cgi.ebay.com/Vintage-Motorola...QQcmdZViewItem

We have done this on some items where there is no room to mount the replacement caps under the chassis and absolutely original appearance is not needed...we use a radio shack mini-box with terminal strips and mount the individual caps that replace the can inside the box.