BIG valves

Some of the larger stuff from my valve collection.

Large early transmitting valve, probably late 1920's

General Electric GL-860, Marconi MR1 rectifier, used in Marconi 2MT experimental broadcast station (1922)

Raytheon RK-28A, Philips PC 1.5/100, Large rectifier tube, CV150 diode

Three high-power valves - one on right is an EEV FX2519 thyratron (6.25MW pulse power)

Three large mercury-vapour thyratrons, which are similar in function to semiconductor thyrisors. The one on the left is a CV22, used to control a magnetron for generating high power radar pulses up to 3MW. Smaller thyratrons here

Above thyratron in its wooden packing crate, looking like it's been caged and tied down to stop it biting people!

Three triodes with side grid connections - General Electronics JAN CDR-808,  Eimac 100TH/VT218, Eimac 304TH (VT254), which has four parallel connected triode assemblies

Eimac CWL-327A. Marked 'US Navy' Hrs. 50 - presumably a design life of 50 hours! Manufactured 1943.