AUDIO VALVES: U19 HEAVY DUTY HW RECTIFIER CV187 CV1508 U23 V1913 10E/520

The U19 is a high voltage half wave rectifier with a series resistance of 600 Ohms and a maximum input capacitance rating of 4 µF.

The anode is carbonised to aid in radiating away the heat generated in use by the intense electron bombardment and the whole electrode structure smacks of longevity and build quality having been constructed with ceramic supports and insulators. It is reassuringly vast at 166mm height. Oram introduced this valve type for Air Ministry use in 1947.

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U19 HEAVY DUTY HW RECTIFIER CV187 CV1508 U23 V1913 10E/520 BY OSRAM NEW BOXED - MULLARD MAGIC - 1

U19, OSRAM, NEW BOXED, HW RECTIFIER, BROWN BASE, CV187, CV1508, U23, V1913, 10E/520, HAMMERSMITH AUGUST 1961 PRODUCTION

CV187. AIR MINISTRY, U19, HEAVY DUTY HW RECTIFIER, CV1508, U23, VU508, V1913, 10E/520, WW2 MANUFACTURE BY GEC SHAW, PRE 1948,

CV187. AIR MINISTRY, U19, HEAVY DUTY HW RECTIFIER, CV1508, U23, VU508, V1913, 10E/520, WW2 MANUFACTURE BY OSRAM

CV187, AIR MINISTRY, U19, HEAVY DUTY HW RECTIFIER, MARCH 1960, OSRAM HAMMERSMITH, CV1508, U23, VU508, V1913, 10E/520,

CV187, AIR MINISTRY, U19, HEAVY DUTY HW RECTIFIER, SEPTEMBER 1959, OSRAM HAMMERSMITH, CV1508, U23, VU508, V1913, 10E/520,