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

Both are acid-etched

but non-strident highs

63-29 188-20 date/EIA codes

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

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