Matched Pair RCA 6BL7 6BL7GTA Vacuum Tubes NOS-Testing Nonal NOS NIB The Rayteons are Japanese and

The Rayteons are Japanese and the Sylvania is American

Not for use in guitar and bass amps

The pressing is excellent with very few issues

Two are 1X2C and the other three are 1X2B

Matched Pair RCA 6BL7 6BL7GTA Vacuum Tubes NOS-Testing Nonal NOS NIB The Rayteons are Japanese andThis new old stock testing matched pair of RCA 6BL7GTA dual triodes was tested on our TV7 U for shorts, gas and transconductance. There were no shorts or gas. Tube One measured 50 50 while Tube Two measured 49 54 where minimum (65%) is 25 25 and 100% is 38. 5 38. 5. These tubes have steel support rods; short bases; beefy black plates: side O getters; anode coolers for cooler operation and longer life. Both have BW date codes. I played them in my Alan