Matched Pair Ken-Rad 2C22 JANCKR2C22 7193 Vacuum Tubes Milspec Black Plate NOS NIB Original new in box GE 12DS7

new in box GE 12DS7 tubes tested to spec on our Paul Hart-calibrated TV7/U

new in box US-made 1LN5 tubes tested to spec on our Paul Hart-calibrated TV7/U

Transconductance measured 116%/104% where minimum (65%) is 70%/70%

Tube One measured 28 while Tube Two measured 29 where minimum (65%) is 22

Matched Pair Ken-Rad 2C22 JANCKR2C22 7193 Vacuum Tubes Milspec Black Plate NOS NIB Original new in box GE 12DS7This 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 60 while Tube Two measured 64 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