GREY PLATE!!!
RARE! Tubes made in 1985-1992 SAME DATA CODES!!!
Equivalents to the 5U3C , 5U4G
The bid is for 2 russian tubes.New, old stock.
The tubes are never used.
Military equipment
Tested with Roetest V10, "the Rolls Royce of tube testers" [emissionlab quote], a wonderful german professional system for testing tubes, it shows everything about a tube.
You are looking at a matched pair of NOS 5C3S, best selected by curves using Roetest V10 professional tube testing system, the best tube tester that exists now, a wonderful device.
TEST CONDITION:
Uh=5Vac /Up=2x500Veff.,Rload=2kohmi,filter cap=4microF
Condition to pass os Rectified
Current>230mA
Matched pairs means 2 tubes that have same current through load resistor.If you buy more than one pair we will send to you all tubes with the same rectified current measured at tests.