THE GREAT MULLARD MAGIC BLOG — ARTHUR FERRIER

The national radio show was a big thing for Mullard and indeed any other post war radio manufacturer as they all pulled out the stops to present their wares to a burgeoning post war consumer boom. The Mullard stand was large and extensive as this photo shows where chassis work from many manufacturers that utilised Mullard components were suspended on show - very outre!   The media in the form of Auntie Beeb was in attendance and here we see a BBC TV cameraman using real film ( and later presumably tele-cine) to record the new range of Mullard valves...

Hey, just look at this nifty invention from Mullard in 1951.  Using flying spot scanning, the time bases of two cathode ray tubes, one a transmitter and the other a receiver are synchronised.  In the transmitter, a raster is projected onto a glass overscreen.  In the absence of any writing on the overscreen, the light beam passes through the glass.  If however, a mark is made on the overscreen then some light is reflected then detected by a photocell.  The electrical currents produced in this way are amplified and used to modulate the beam in the receiving cathode ray tube...