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In Reply to: RE: Vintage Mullard EL84 unique D code? Anybody? posted by Permanent Waves on September 20, 2017 at 21:41:10:
look for an etched factory code (letter B, D, R or special signs like unequal sign, semicircular arch etc.) near the bulbĀ“s bottom and tell us. the origin should be obvious then.
this link might also be helpfull for you and others...
http://www.audiotubes.com/mullcode.htm
N.
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- RE: Vintage Mullard EL84 unique D code? Anybody? - Nunki 09/20/1722:58:37 09/20/17 (0)