SCR-300 site
 

Has many pics.

The post-war British made version (Wireless Set No.31) has turned up here in Aust. in the form of the vehicle mounted variant, which had a separate power supply and from memory was mounted with a 19 set .

https://www.dropbox.com/s/qwuy23qnzm...%2001.pdf?dl=0

More info:

http://www.scr300.org/

http://www.vmarsmanuals.co.uk/newsle...icles/ws31.pdf