12AX7 ECC83 VACUUM TUBE PAIR RAYTHEON TEST 85% STRONG BLACK PLATE BALDWIN STAMP

Description

Number
12AX7 ECC83
Manufacturer
RAYTHEON
Branded             Baldwin
Country            USA
Code             280 61 29
D
ate                   1961
GM
1052 / 1055 & 1052
/ 1132
Plate                   Black
Getter                 Halo
Plate 1
4
2.1
/ 4
2.1
Plate 2
42.2 /  45.3
Tested                 85
%
Up for your consideration is two closely matched
12AX7 ECC83
RAYTHEON
USA  vacuum tube (Black plate).
The tubes are stamped
RAYTHEON
My customers comment / feedback was : "Sound better than the Mullards I was using".
The tubes were tested on a TV-7 tube tester that was calibrated professionally by Dan Nelson it has a digital meter.
Pulled from a 1960 Baldwin
tube organ
On the TV 7 the minimum requirement rating is 32.
32= 65% of the value of a new tube.
Each unit of measurement on the Tv 7 for this tube = 2.031
The Tubes tested at 85%
(
2.031
x  42.1  = 85.5 %).