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Rare Philips ECG Sylvania made 7581A power output tubes. These are highly recommended for Dumble type circuits Two-Rock amplifiers, Bludotone, Glaswerks and any other guitar amplifier where you want a super beefy 6L6GC type tube. Uprated mil-spec construction these tubes are built to last. Screened and tested, matched for current draw on our Amplitrex AT-1000 and maxi-matcher. Only 1 pc in stock at this time. NOS in original boxes.
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.
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