RCA Black Plate 5963 / 12AU7 / ECC82 Vacuum Tube Industrial-Grade For Your Univalve Or Bottlehead 6JE6 Tube One measured 55 while

Tube One measured 55 while Tube Two measured 60

7 and 1830/20

This is a wonderful recording with deep

This pressing has lightly-moderate surface noise audible in pianissimo-piano passages and barely-audible in mezzo forte passages and louder

RCA Black Plate 5963 / 12AU7 / ECC82 Vacuum Tube Industrial-Grade For Your Univalve Or Bottlehead 6JE6 Tube One measured 55 whileThis RCA Black Plate, industrial grade 5963 12AU7 ECC82 tube was first tested on our Paul Hart calibrated TV7 U as a 5963 as well as a straight 12AU7 and then tested on our Maxi Preamp II for shorts, gas, noise, transconductance and gain. There were no shorts, noise or gas and they tested as follows: On the TV7 U with bias set to 30 (5963) it measured 66 56 where minimum (65%) is 56 56. On the TV7 U with bias set to 24 (12AU7) it measured 86 73 where