Matched Pair RCA Radiotron Number / Type 89 #89 Vacuum Tubes NOS-Testing 6B8 Grid Cap

Matched Pair RCA Radiotron Number / Type 89 #89 Vacuum Tubes NOS-Testing 6B8 Grid CapThis 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

marked for safe and easy insertion

I am playing them in my Bottlehead Crack headphone amplifier as I write

a third mica spacer for increased vibration resistance and lowered microphonics

new in box Italian Sylvania 12SN7GTA dual triode was tested on our Hickok 600A for shorts

This RCA 872A rectifier tube is used

Tube One drew 26

well recorded

Tube Three (triode): 51

Please rely on the pictures as to the true content of these albums as my Russian is worse than poor

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

new in box Raytheon 1032 / CK1032 is one of the strangest tubes I've ever seen and I have no idea how to test it