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RF Burn · 12th Jan 2019, 7:21 pm

That 'N' embossed on the base pretty well confirms that it is of UK manufacture. Now looking at the attached label, the Service Valve Equivalents Guide gives the CV587 as 6Q7G (USA), DH63 (MOV) and the ZA manufacturers code as 'MOV Gateshead' which strengthens the MOV (Marconi Osram Valve company) connection. Is that information strong enough to fix a result?

Brimar also copied the 'stop sign' or hexagonal border for their early valves from their USA originals, after all the company was named BRItish MAde American Range (BRIMAR) for a reason . . .

Other British manufacturers normally produced 'equivalents' or 'substitutes' to USA type valves using their own standard type numbering systems (e.g 6Q7 = EBC33, DH63; 6J5 = L63; 6F5 = H63; 6K7 = EF39, KTW63 etc.)

Also, do not forget the flood of 'tubes' from the USA during & after WW2 as parts/spares for the US and British military and on 'lend/lease' that were marked and distributed by British manufacturers.

Adrian.

12th Jan 2019, 7:21 pm	#24
RF Burn Hexode Join Date: Apr 2008 Location: Ramsgate, Kent, UK. Posts: 252	Re: 6Q7G Valve, what brand ? That 'N' embossed on the base pretty well confirms that it is of UK manufacture. Now looking at the attached label, the Service Valve Equivalents Guide gives the CV587 as 6Q7G (USA), DH63 (MOV) and the ZA manufacturers code as 'MOV Gateshead' which strengthens the MOV (Marconi Osram Valve company) connection. Is that information strong enough to fix a result? Brimar also copied the 'stop sign' or hexagonal border for their early valves from their USA originals, after all the company was named BRItish MAde American Range (BRIMAR) for a reason . . . Other British manufacturers normally produced 'equivalents' or 'substitutes' to USA type valves using their own standard type numbering systems (e.g 6Q7 = EBC33, DH63; 6J5 = L63; 6F5 = H63; 6K7 = EF39, KTW63 etc.) Also, do not forget the flood of 'tubes' from the USA during & after WW2 as parts/spares for the US and British military and on 'lend/lease' that were marked and distributed by British manufacturers. Adrian. Last edited by RF Burn; 12th Jan 2019 at 7:34 pm.