BVWS Bulletin Volume 5, Number 3 (December 1980)
Front cover: Four Avometers from the period 1934-1936.
|33||The Thoriated Tungsten Filament.
|The development of “dull emitter” filaments, their uses and rejuvenation. Includes a list of dull emitter valves.|
|37||Restoring Amplion Horn Speakers With A Black Crackle Finish.
Alan T. Shaw
|Restoring the finish on early aluminium horns.|
|38||Biased In Favour of Stability Part 2.
|The low frequency stages (previous part in V5N2).|