2 Tung-Sol Number / Type 76 #76 Vacuum Tubes Lot Of Two 12BK5 These five Philco Type 37

These five Philco Type 37 triodes were tested on our Paul Hart-calibrated TV7/U for shorts

and if you need just one strong section

and bright

These sixteen Sylvania 6CB6A / 6CF6 tubes tested to spec on our Paul Hart-calibrated TV7/U

This matched pair of RCA steel plate 6AK5 tubes was tested on our Paul Hart-calibrated TV7/U tester for shorts

2 Tung-Sol Number / Type 76 #76 Vacuum Tubes Lot Of Two 12BK5 These five Philco Type 37This pair of Tung Sol type 76 triodes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured 57 for Tube One and 65 for Tube Two where minimum (65%) is 36 and 100% is 55. These tubes have dark gray, rounded plates and excellent flashing. I have played them in my Radio Craftsmen RC 2 monoblocks (with adapters, not included). They are dead quiet when the CD player is