Electro-Harmonix 12BH7A is a current production tube manufactured in Russia. It is a copy of GE Grey Plate 12BH7. 12BH7A-EH features long plate boxes for high current capacity and thick glass for lower microphonics.
12BH7A-EH is a drop-in replacement whereever 12BH7 or 12BH7A is called for.
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