5 Sylvania 50Y6 50Y6GT Vacuum Tubes NOS NIB Lot Of Five Quintet August 23 2023 but I would step it

but I would step it up to an 8 or so as this sound striping recording is truly cutting edge

winged plates with one rectangular hole per plate

These tubes have gray coated bottles

54 and 66 where minimum (65%) is 42

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