Matched Pair Ken-Rad 2C22 JANCKR2C22 7193 Vacuum Tubes Milspec Black Plate NOS NIB September 12 2024 This pressing has lightly-moderate surface

This pressing has lightly-moderate surface noise

These are ultra-low-noise

Igor Oistrakh

54/54 and 54/54 where minimum (65%) is 40/40

new in box US-made 6BN4 / 6BN4A tubes tested to spec on our Paul Hart-calibrated TV7/U

Matched Pair Ken-Rad 2C22 JANCKR2C22 7193 Vacuum Tubes Milspec Black Plate NOS NIB September 12 2024 This pressing has lightly-moderate surfaceThis new old stock, new in box matched pair of Ken Rad JAN CKR 2C22 7193 milspec triodes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Tube One measured 48 while Tube Two measured 49 where minimum (65%) is 38 and 100% is 58. I have played them in my Radio Craftsmen RC 2 monoblocks (with adapters not included) and they sound outstanding. They are dead quiet when the CD player is muted