Matched Pair RCA 6BL7 6BL7GTA Vacuum Tubes NOS-Testing

Matched Pair RCA 6BL7 6BL7GTA Vacuum Tubes NOS-TestingThis 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

It sounds very good with an occasional pop and tick audible in the pianissimo passages

harp-shaped getters and shields between the triodes for reduced cross talk

It measured 42 in its triode section where minimum (65%) is 25 and 100% is 39

They are dead quiet when the preamp is muted and sound good even with 6

These tubes have steel support rods

GE-BRANDED 17EW8 / HCC85 tubes tested to spec on our Paul Hart-calibrated TV7

These ten Sylvania 29LE6s tested to spec on our Paul Hart-calibrated TV7/U

IN NEARLY 9000 SALES

CUSTOMS DELAYS CAN ADD WEEKS TO DELIVERIES

This trio of Toshiba output tubes was tested on our Maxi-Matcher in Real World Conditions with 400 volts on the plates and a bias of -36 volts for shorts

These five new old stock

There were no shorts or gas