Sylvania 12AU7 12AU7A ECC82 Vacuum Tube CONN-Selected For Your Bottlehead

Sylvania 12AU7 12AU7A ECC82 Vacuum Tube CONN-Selected For Your BottleheadThis Sylvania MANUFACTURED, CONN BRANDED and CONN SELECTED 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 perfectly balanced 72 72 where minimum (65%) is 56 56 and 100% is 86 86. This tube has narrow, gray, 16 MM plates; good flashing; a top, O getter; copper support rods; excellent silkscreening and 312 639 provenance date codes.

crenelated rectangular mica spacers

wire snubbers for lowered microphonics

I just cleaned this LP on our VPI 16

Where the labeling took place is anyone's guess as the Raytheon-branded tube is stamped "England" while the Ameco tube claims to have been made in the USA

I just cleaned this two LP set on my VPI 16

The diameter across the porcelain is approximately 1

new in box US-made 12DU7 tubes tested to spec on our Paul Hart-calibrated TV7/U

Both have double O getters

Two are American and one is Japanese

An eight out of ten with an ice bottom end

44/50 and 52/50 where minimum (65%) is 40/40 and 100% is 62/62

IN WELL OVER 7000 SALES