Matched Pair RCA 12SL7 12SL7GT Black Plate Clear Bottle Vacuum Tubes NOS NIB 6BS8 Nonal T22 but has GE 188-5 and

but has GE 188-5 and a sutured top

This Philco 5Y4G rectifier tube tested 54/49 where minimum (65%) is 40/40 and 100% is 62/62

Etsy will indicate the quantity remaining

Menin" by Mercury Living Presence

This new old stock-testing RCA clear top 6CG7 / 6FQ7 dual triode was tested on our Paul Hart-calibrated TV7/U for shorts

Matched Pair RCA 12SL7 12SL7GT Black Plate Clear Bottle Vacuum Tubes NOS NIB 6BS8 Nonal T22 but has GE 188-5 andThis new old stock, new in box, perfectly matched pair of RCA black plate, clear bottle 12SL7GT dual triodes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas and they test as follows: Tube One Transconductance: 45 45 Tube Two Transconductance: 45 45 12SL7 bogey: Minimum (65%) is 32 32 and 100% is 49 49 Physical Characteristics: Bases: tall Bottles: medium height Date Codes: 1 43 and NK EIA