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The CV1175 is an acorn pentode for operation up to 300 MHz. The prototypes were the ZA1 and the AP4. Before the CV register the service designation was the NR54.

Reference: Data-sheet. Type CV1175 was first introduced in 1937. See also 1937 adverts.

Absolute Maximum Operating Conditions^¶

Thanks to Frank Philipse for supplying the above PDF datasheet.