Matched Pair General Electric GE 6SJ7 6J8P Vacuum Tubes NOS-Testing Radio Craftsmen RC-2

Matched Pair General Electric GE 6SJ7 6J8P Vacuum Tubes NOS-Testing Radio Craftsmen RC-2This new old stock testing, nearly perfectly matched pair of GE 6SJ7s was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured 62 for Tube One and 64 for Tube Two where minimum (65%) is 40. They have 4 48 188 5 and 5 43 188 5 date provenance codes, respectively. I am playing them as I write in my Musical Paradise MP 301 MK3 and they sound excellent. WE HAVE SCORES OF

The vinyl is heavy with a light to lightly-moderate amount of pops and ticks

new in box Sylvania 32ET5 tested to spec on our Paul Hart-calibrated TV7/U

top mica spacer and a bottom

new in box RCA 17CU5 / 17C5 tubes tested to spec on our Paul Hart-calibrated TV7/U

51/52 and and 52/50 Minimum (65%) is 40/40 and 100% is 62/62

Oh Sweetheart

2 milliamps with a transconductance of 5640 micromhos

mesh plate tubes tested 20

Tube Five (triode): 46

This Hoffman 6AF4A tested to spec on our Hickok 800

It measured 55/51 where minimum (65%) is 40/40 and 100% is 62/62

This new-looking Baird Atomic GS10C/S CV2325 Dekatron counting tube looks new