You might want to try calling Ken Chait at Advantage Tube Services, # 1-800-273-7234.
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Hello Alex. Yes, Mullard made many outstanding tubes,some are legendary today. However.They also made a lot of mediocre tubes as well as some downright duds for audio applications. You never mention what "type" of mullard tubes you received. Output tubes, triodes,tetrodes, 9 pin miniature receiving tubes or rectifiers, or or or or???????????????
Hello all of you!
Sorry... I received 50 used mostly branded Philips, Thorn & RCA all EL-34 series, and most important ALL THESE was made in England "B" the first of the 4 digit-code at the lowest glass part.
Some with 2 getters and mostly with only One also mostly "crimped" plates and a few "Welded" ones.
Which one is better...really I don't know...YET!
All my best wishes...