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G8BBZ · 23rd Apr 2018, 11:29 am

G6Tanuki wrote:

"I wonder to what extent the entry of the USA into WWII had on the adoption of a consistent valve-numbering scheme by the UK? The US had its "JAN" [Joint Army-Navy] numbering scheme of course."

But I think the JAN nomenclature wasn't introduced until 1944/45 at the earliest and even then valves were not covered by this system but were designated by their commercial type number (RETMA system)

cheers
Peter G8BBZ

23rd Apr 2018, 11:29 am	#7
G8BBZ Pentode Join Date: Oct 2005 Location: Hebden Bridge, West Yorkshire, UK. Posts: 200	Re: When did "CV" numbering start? G6Tanuki wrote: "I wonder to what extent the entry of the USA into WWII had on the adoption of a consistent valve-numbering scheme by the UK? The US had its "JAN" [Joint Army-Navy] numbering scheme of course." But I think the JAN nomenclature wasn't introduced until 1944/45 at the earliest and even then valves were not covered by this system but were designated by their commercial type number (RETMA system) cheers Peter G8BBZ __________________ Peter G8BBZ