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12AX7 tube Frequency response testing Penta vrs JJ Showdown Experiment
8:09
12AX7 tube Frequency response testing Penta vrs JJ Showdown E…
4.5K views2 months ago
YouTubeD-lab Electronics
12AX7 vs. 12AT7 vs. 12AU7 in V1 and V2: Distortion/gain tube comparison
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