eBay

Number 12AX7 ECC83

Manufacturer RAYTHEON

Branded LOWERY

Country USA

Code 280 63-33

Date 1961

GM 1052 / 1030 & 1157 / 1152

Plate Gray

Getter Halo

Plate 1 42.1 / 46.3

Plate 2 41.2 / 46.1

Tested 83 %

Up for your consideration is two closely matched 12AX7 ECC83 RAYTHEON USA vacuum tube (Gray plate).

The tubes are stamped LOWERY

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 41.2 = 83.6 %).