Matched Pair Hitachi 7591 vacuum tubes, tests Transconductance of Gm 5500, good condition, 6-I. Tested with Hickok 533A calibrated to 6L6 reference standard. See pictures for details.
60%
Matched Pair Hitachi 7591 vacuum tube tests Gm 5500, good condition, 6-I
Original price was: $87.99.$52.79Current price is: $52.79.
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