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The CV1267 is a half wave rectifier. The prototype was the 1D5. The old service code is NU15.

The heater is single stand and in two halves. It looks as if the heater passes through the cathode tube up to 16 times/

The central operating area is small with the anode extended sideways to increase the area for cooling.

The classic envelope is 44 mm in diameter, and excluding the B5 base pins is 101 mm tall.

Reference: Data-sheet.

Pin Connections

Absolute Maximum Operating Conditions^¶

Thanks to Frank Philipse for supplying the above PDF datasheet.