4 Sylvania 6SH7 Vacuum Tubes NOS NIB Lot Of Four XXFM Loktal Tube One Plate Current Draw:

Tube One Plate Current Draw: 25

This Sylvania number 76 tube tested to spec on our Paul Hart-calibrated TV7/U

This Western Electric 347A will be tested on our Paul Hart-calibrated TV7/U for shorts

This hardcover book is in very good condition

new in box Raytheon 6DS4 nuvistor tube tested to spec on our Paul Hart-calibrated TV7/U

4 Sylvania 6SH7 Vacuum Tubes NOS NIB Lot Of Four XXFM Loktal Tube One Plate Current Draw:These four new old stock, new in box Sylvania 6SH7 tubes tested to spec on our Paul Hart calibrated TV7 U. This RCA 807 output tube was tested with adapters on our Maxi Matcher 2 for shorts, gas and transconductance with 400 volts on the plates and a bias of 48 volts. There were no shorts or gas. Plate current draw was 19. 8 milliamps while transconductance measured 2440 micromhos. (New 807s typically test from the mid teens to mid 30s with