HARD TO FIND Tube, LABELS Worn (partial "R" code still present), Tested on a Hi End Maxi-Preamp II tester for Gain (Mu), Transconductance (Gm), and Noise (dB), a gain of <50> is the expected result for NOS in this instance, Mottled Glass, Full Rod Support, Mitcham Factory Production, Halo Getters, long-lived and sweet in hi-fi applications, The top end is silky and pleasant, without being rolled-off.
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