Pow_22 Posted March 16, 2013 Share Posted March 16, 2013 Anyone help identify this valve i found in a box in out loft (not my uncles loft!). From what i can tell on Google its a blackburn coded mullard? Its a Cv491 with the codes 'Gf2' and 'B4F4' on the bottom. I have no means of testing other than whacking it in one of the Hartkes and seeing if it works. Can post pics later if it helps Quote Link to comment Share on other sites More sharing options...
bertbass Posted March 16, 2013 Share Posted March 16, 2013 Here you go. http://www.r-type.org/exhib/aaa0348.htm Quote Link to comment Share on other sites More sharing options...
BILL POSTERS Posted March 16, 2013 Share Posted March 16, 2013 CV is an old miltary prefix. its similar to ECC82 according to my old wireless world data book or if you want to decipher it, theres always this; [url="http://www.tubecollector.org/cv/1963/"]http://www.tubecollector.org/cv/1963/[/url] Quote Link to comment Share on other sites More sharing options...
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