Matched Pair RCA 12SL7 12SL7GT Vacuum Tubes Valves Mosaique Une Enfance The 1X2 has been revised

The 1X2 has been revised to "1X2A"

Tube One (Philco-LABELED

This pair of Tung-Sol type 76 triodes was tested on our Paul Hart-calibrated TV7/U for shorts

36/37 and 40/38where minimum (65%) is 40/40

This hardcover book is in fair condition

Matched Pair RCA 12SL7 12SL7GT Vacuum Tubes Valves Mosaique Une Enfance The 1X2 has been revisedThis matched pair of RCA 12SL7GT dual triodes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured 41 49 for Tube One and 44 44 for Tube Two where minimum (65%) is 32 32 and 100% is 49 49. These tubes have excellent flashing; dark, gray plates and bottom, dimpled sheet getters. Both tubes were made in the same factory just as RCA bought out Cunningham. They are