These tubes are from the United States and have a specification of 8500. The data suggests that these tubes are of high quality and have been tested to ensure they are in excellent working condition.
Item Tag: 5965
-
GE 5965 / 12AT7 MATCHED PAIR TUBES/1960’s, MaxiPreamp II Tested, SM1371
Tested on a Hi End Maxi-Preamp II tester for Gain (Mu), Transconductance (Gm), and Noise (dB). It most likely is because it has a lower gain compared to the 12AT7. Gain (Expected Value=40 mu). This is very important!
-
GE 5965 / 12AT7 MATCHED PAIR TUBES/1960’s, MaxiPreamp II Tested, SM1377
Tested on a Hi End Maxi-Preamp II tester for Gain (Mu), Transconductance (Gm), and Noise (dB). It most likely is because it has a lower gain compared to the 12AT7. Gain (Expected Value=40 mu). This is very important!
-
GE 5965 / 12AT7 MATCHED PAIR TUBES/1960’s, MaxiPreamp II Tested, SM1376
Tested on a Hi End Maxi-Preamp II tester for Gain (Mu), Transconductance (Gm), and Noise (dB). It most likely is because it has a lower gain compared to the 12AT7. Gain (Expected Value=40 mu). This is very important!
-
3 – GE JAN 5965 Side Getter Audio Tube NOS Premium Quality Mil Spec Tubes
NOS tubes fall within the Gm characteristic range of an average tube, as published in the RCA RECEIVING TUBE MANUAL, which states “Individual tubes, like any manufactured product, may have characteristics that range above or below the values given.