CV Register of Electronic Valves
CV Register of Electronic Valves (including semiconductor devices) 1963, Amendment 14 (May 1971)
CV titles - page by page (PDF).
Type designation to CV titles (Commercial to CV xref)
Old stores ref number to CV titles (old numbers to CV; ZA, 10E, 110E etc)
Joint Service Catalogue numbers
The UK NATO Stock Number is obtained by formula for many CV valves for which CV numbers were allocated prior to 1961. Valves to which CV numbers have been allocated after this date have Stock Numbers which bear no relation to the CV number.
"No NATO Stock No. has been allotted" means that the device is of UK origin but no stock number has been allotted as it had not been used for military purposes. "No UK NATO Stock No. has been allotted" means that the device is of other than UK origin. A stock number from another Issuing Authority may be in existence.
Change in NATO Stock Number Class Codes
All thermionic valves and semiconductor devices for military purposes have been allotted a NATO Stock Number in the Class Code 5960. Integrated circuits have been allotted 5999, but from January 1967, the three classes of devices were segregated as follows:
The list of NATO Stock Numbers against CV Numbers shown here has been ammended to include the new Class Code. Where an NSN is found by formula, refer to the CV register to find the class of device from the Description column. For example, CV123 is classed as a valve so the Class Code is 5960; CV351 is a semi-conductor so the Class Code is 5961.
List of CV Numbers to which the UK NSN is obtained by formula
The formula applies to the following CV numbers:
The Stock number is obtained by taking the number part of the CV number and prefixing this with the Class Code 5960, the UK National Code 99, and padding the part number to 7 digits. Thus, CV123 becomes 5960-99-000-0123.
Exceptions to the above are as follows:
CV number to NSN
NSN to CV number
NSN table scans provided by Harvey Edwards
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