KEN-RAD JAN- CKR- 6SL7GT VT-229 Black Plate Valve Tube NOS (M59)
KEN-RAD JAN- CKR- 6SL7GT VT-229 Black Plate Valve Tube NOS (M59). Tested BK 600 = 85/85 Hickok quality test 1950/2100 mhos Mutual conductance 1050/1450 Book mutual conductance 900/1400 No gas shorts grid emissions