THE GREAT MULLARD MAGIC BLOG

Let's continue this story by today looking at GRIDS.  These are found between cathode and anode except for diodes which have just two electrodes - the anode and cathode.  The purpose of a GRID is to control the value of anode current.  In triodes, we have just one GRID - the control grid.  In pentodes we have three grids with the inner one being the CONTROL GRID, the next the SCREEN GRID and the outer one the SUPPRESSOR GRID.   In each case, the GRID is a cylindrical or ellipsoid spiral of fine molybdenum or molybdenum alloy wire wound onto...

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...

This is the fifth in a series of guest blog posts that I will be sharing with my readers.  A small group of us, all with different backgrounds and geographical locations, have come together in an effort to share our combined vintage knowledge with all who love the vintage/antique world as we do. Visit all of us at the Vintage & Antiques Community on G+ . This week's guest post, written by Karen of Mullard Antiques (who also happens to be Mrs Mullard Magic), takes a look at the BBC Sci-Fi programme Doctor Who, and the rise in value of collectible merchandising. In common...

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...