(2) GE 5R4GYA Matched Black Plate Tube Tested On Calibrated TV-7 Plate Current
Matched for transconductance emission. Both tubes were tested on aDan Nelson TV-7 tube tester and show strong, balanced results. Plate Current: 26.0v / 22.3v. Plate Current: 24.7v / 22.5vLot#356. Plate 1 : 57 (%92).
GE General Electric 5R4GYB Rectifier Tube Hanging Halo Get Black Plates Tested
Up for sale is a GE General Electric 5R4GYB Rectifier Tube. Constructed with brown base, top hanging halo getter, & black plates.
PAIR – GENERAL ELECTRIC – 5R4WGB – VACUUM TUBE – CALIBRATED TV‑7 TESTED
2 x JAN-5R4ga G.E. Tubes *Hanging Filament* Strong Matched Pair*#3
2 x JAN-5R4ga GE Tubes. I do combine S&H. Min(65%) = 40/40.
5R4GYB GENERAL ELECTRIC BLACK PLATE RUGGEDIZED RECTIFIER TUBE NOS (1965) #12C27
Ruggedized military production, DHT tube with black plates and side getter. With rectifiers. Tube is in NOS condition, date code of “LU” indicates production in August, 1965. We’ve seen this opinion on hobbyist forums for many years, and took it to heart.
NOS 5R4 Matched Pair 5R4gyb black plates Brown Base Tall Bottle
NOS tubes fall within the Gm characteristic range of an average tube, as published in the RCA RECEIVING TUBE MANUAL, which states “Individual tubes, like any manufactured product, may have characteristics that range above or below the values given.
Three GE 6FQ7 6CG7 Tubes NOS NIB M Const. GM[%]: 96/103 100/96 103/100 AMPLITREX
Three Excellent GE 6FQ7 6CG7 Tubes. Choice 6FQ7 6CG7 Tubes. Discriminating Test Results from the AMPLITREX AT1000. AMPLITREX AT-1000. Date Codes : IC,MH,MS Value Added Tubes. GM Takes Precedence Over EM.
Pair GE 6CG7 6FQ7 Tested Like NOS Tube
Tested Good.
5R4GYA NOS/NIB GE Full Wave Rectifier Tube-Tested-Free Shipping in the US
5R4GYA NOS/NIB GE brown base full wave rectifier tube. Date code SV.