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RCA Black Plate 5963 / 12AU7 / ECC82 Vacuum Tube Industrial-Grade For Your Univalve Or Bottlehead 6JE6 7 and 1830/20
RCA Black Plate 5963 / 12AU7 / ECC82 Vacuum Tube Industrial-Grade For Your Univalve Or Bottlehead 6JE6 7 and 1830/20
$12.88
Description
7 and 1830/20
This lot of three new old stock-testing 1S2A / DY87 tubes werw tested 68 on our Paul Hart-calibrated TV7/U for shorts
they have 210 50-52 and 2105005 provenance/date codes
This is a wonderful recording with deep
One of our best-sounding vintage albums
RCA Black Plate 5963 / 12AU7 / ECC82 Vacuum Tube Industrial-Grade For Your Univalve Or Bottlehead 6JE6 7 and 1830/20This 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
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