Matched Pair Ken-Rad 2C22 JANCKR2C22 7193 Vacuum Tubes Milspec Black Plate NOS NIB 6FQ7 NOS NIB

Matched Pair Ken-Rad 2C22 JANCKR2C22 7193 Vacuum Tubes Milspec Black Plate NOS NIB 6FQ7 NOS NIBThis 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

These tubes have silver and gray bottles

had excellent frequency response and was very quiet in my Bottlehead

These tubes have four shiny copper support rods

Both are acid-etched

63-29 188-20 date/EIA codes

but non-strident highs

THIS TUBE'S CENTERING PIN IS MISSING AND IT HAS BEEN MARKED FOR SAFE AND EASY INSERTION

Most don't test great

GE-MANUFACTUREDwhere minimum (65%) is 50/50

They were Groove Tube-matched both with number 6 ratings

There are a total of five 12D4 tubes in this lot

These seven Philco number / type 27 tubes tested as good on our Paul Hart-calibrated TV7/U