The 7189A has different internal pin connections different than a 6BQ5 = EL84 = CV2975 = E84L = 7189 tube type. Use only in circuits which call for a 7189A.
Brown base Tesla E34L. $139.99 each. Reversed engineered Tesla version of the KT77, excellent sound. This is a suitable replacement for any EL34 = 6CA7 POWER PENTODE tube type. Various brands available.
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