[Premium-Rx] Chase Measuring Receivers

[spencer bahner]

Greetings Premium RX-ers-
 
Does anyone know anything about the specialized measuring and EMI/EMC receivers made by Chase in the UK? More specifically, I have a Chase 4431 portable receiver and would love to find an operators manual and service manual for it. I can't seem to find any details on Chase as presently being in business. Can anyone fill me in on if they might have been bought by a company that might still have manuals available or if they know of a source who can supply manual copies?
 
Thanks!
 
Spencer Bahner K7SLB