The consensus seems to be that the unit I was trying to describe was built by B&W (Barker and Williamson). Also, that Heathkit had one by the late 50's which added a "lid" to the unit, it is thought their model number was "BN-1", not an absolute however. Anyway, thanks to the several who played the memory lane game with me. 73, Jim KH7M (W6KPI in 1950 and for the next 43 years!)