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RCA 6680 12AU7 12AU7A ECC82 Vacuum Tube Valve Industrial Version NOS-Testing Perfect For Univalve And Bottlehead Number Engraved It comes with a box

$22.20

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It comes with a box

The following artists contributed to this tape: Gervase DePeyer

This pressing has very-light surface noise audible only in quiet passages

It has a short base

RCA 6680 12AU7 12AU7A ECC82 Vacuum Tube Valve Industrial Version NOS-Testing Perfect For Univalve And Bottlehead Number Engraved It comes with a boxThis new old stock testing RCA 6680 12AU7A ECC82 dual triode was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured a nicely balanced 92 95 where minimum (65%) is 56 56 and 100% is 87 87. The 6680 is the industrial version of the 12AU7A. It has gray 12MM plates; excellent flashing for an extremely hard vacuum and extended tube life and a top O getter. I have played it

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