Grieveman Posted September 1, 2019 Posted September 1, 2019 Can any tube expert out there identify these tubes? They say they are 12AU7A CV491 Other markings are KD/SDA and 71 06 Also looks like a little "WA"... Any help would be much appreciated. I am guessing they must be either Mullard, Amperex, Telefunken or Brimar...but I'm no expert!
Gryffles Posted September 1, 2019 Posted September 1, 2019 Google British Military valve markings and you’ll find which factory they were made
Guest Terence Hill Posted September 1, 2019 Posted September 1, 2019 May be AWA (Australian) https://mullard.org/blogs/news/83886851-cv-numbers-and-uk-military-date-and-factory-codes
Ian McP Posted September 2, 2019 Posted September 2, 2019 Retrovox up in Wagga will most probably know! https://www.facebook.com/Retrovox.com.au/ http://www.retrovox.addr.com/page1.html
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