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The CV4071 is a reliable high voltage half wave rectifier based on the CV404. The construction features large ceramic insulators and this is to be expected in a device that can withstand a peak inverse voltage (PIV) of 15 kV. The peak forward current is 300 mA and the rectifier is also specified for pulse service, where the peak pulse current is 3 Amps. The series resistance must be at least 7,500 OHMS to protect the cathode. The maximum reservoir capacitor specified is 0.25μF.

The CV4071 is indirectly heated with an oxide coated cathode, the cathode being strapped to one side of the heater internally. Looking at the top of the cathode tube one can see the top hairpin bends of three heater lengths. The heater is not coiled but six lengths folded inside the cathode. The anode tube is flared outwards at both ends to minimise the risk of flash over to the central cathode. The anode is blackened on the outside and has four blackened fins attached. These fins both provide fixing points to the ceramic supports and help cool the anode. This is a compact valve for its rating and the bulb temperature, when in operation, must not exceed 200°C.

The wide glass tube envelope is 28 mm in diameter, and excluding the IO base pins is 99 mm tall.

Reference: Data-sheet. Type CV4071 was first introduced in 1963. See also 1963 adverts.

Pin Connections

Absolute Maximum Operating Conditions^¶

Thanks to Frank Philipse for supplying the above PDF datasheet.