THE GREAT MULLARD MAGIC BLOG — BTH

Perusing the panoply of valve advertisements from the halcyon days of yore, I was struck to use the above by-line.  Let me explain further...... First of all there was BTH in 1924 telling us that the valve was "the heart of the wireless" and questioning whether or not your set had "valvular disease." Then we have Marconi in 1925, also telling us that the valve is t"he heart of wireless"  i This theme continues as we see in 1945 when Raytheon  issued a hearty advert extolling the use of their valves in an electronic stethoscope. Interestingly, Mullard was "heartless" and if fell...