RCA Black Plate 5963 / 12AU7 / ECC82 Vacuum Tube Industrial-Grade For Your Univalve Or Bottlehead 6JE6 This lot of three new

This lot of three new old stock-testing 1S2A / DY87 tubes werw tested 68 on our Paul Hart-calibrated TV7/U for shorts

not included) in my AC-heated Alan Eaton single-ended 45 amplifier and they sound OK

One of our best-sounding vintage albums

This is a wonderful recording with deep

7 and 1830/20

RCA Black Plate 5963 / 12AU7 / ECC82 Vacuum Tube Industrial-Grade For Your Univalve Or Bottlehead 6JE6 This lot of three newThis 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