Matched Pair RCA Radiotron Number / Type 89 #89 Vacuum Tubes NOS-Testing 6B8 Grid Cap marked for safe and easy

marked for safe and easy insertion

This tube comes in a box typically seen for large corporate tube users wherein various

44/50 and 52/50 where minimum (65%) is 40/40 and 100% is 62/62

a third mica spacer for increased vibration resistance and lowered microphonics

Tube Three (triode): 51

Matched Pair RCA Radiotron Number / Type 89 #89 Vacuum Tubes NOS-Testing 6B8 Grid Cap marked for safe and easyThis matched pair of RCA Radiotron number 89 tubes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. They tested as follows: 56 and 58 where minimum (65%) is 395 and 100% is 60. These are great looking, well constructed tubes with Micanol bases; anode radiators for cooler operation and longer tube life and gray and silver bottles. WE HAVE SCORES OF THOUSANDS OF VACUUM TUBES. IF IT'S NOT