4 Tung-Sol 6K6 6K6GT Vacuum Tubes Black Glass Lot Of Four NOS-Testing

4 Tung-Sol 6K6 6K6GT Vacuum Tubes Black Glass Lot Of Four NOS-TestingThis new old stock testing lot of six Tung Sol black glass 6K6GT tubes were tested on our Maxi Matcher 2 with 325 volts on the plates and a bias of 36 volts for shorts, gas, plate current and transconductance. There were no shorts or gas and they measured as follows (from left to right, top to bottom): Tube One: 31. 8 milliamps' plate current 2170 micromhos; Tube Two: 35. 1 1980; Tube Three: 40 2120 and Tube Four: 42. 1 2260. New nominal

Their readings are 47 and 61 where minimum (65%) is 42

testing to spec

Tube One measured 48 while Tube Two measured 49 where minimum (65%) is 38 and 100% is 58

This Telefunken smooth plate 12AX7 / ECC83 dual triode was tested on our Paul Hart-calibrated TV7/U for shorts

stellar flashing

that incredible Sylvania flashing and 312339 and 312 5522 date codes

(New 12AZ7s typically test within a standard deviations of 33)

Transconductance measured 112%/114% for Tube One and 114%/115% for Tube Two

new in box GE 6EB5 tube tested to spec on our Paul Hart-calibrated TV7/U

They measured 89/65

but I do not have a setting for it on our TV7/U

Two are RCA 956s and the third is a Tung-Sol JAN-CTL-956 / VT-238