4 Ken-Rad 6D6 Vacuum Tubes Valves Black Glass Lot of Four NOS-Testing 5Z4 Rectifier

4 Ken-Rad 6D6 Vacuum Tubes Valves Black Glass Lot of Four NOS-Testing 5Z4 RectifierThis lot of four black glass Ken Rad 6D6 tubes was tested on our Jackson 648 Mutual Conductance tester for shorts, gas and transconductance. There were no shorts or gas. They tested (from left to right) as follows: 81%, 106%, 109%, and 117% respectively. New nominal is within a standard deviation of 1600 and the Jackson expresses this as a percentage. BECAUSE OF THE BIZARRE, INTRUSIVE AND DRACONIAN GERMAN PACKAGING REGULATIONS AND THE SEVERE FINES AND

This lot of RCA 2050 thyratron tubes were tested on our Paul Hart-calibrated TV7/U

952 and 0-39 date codes

Tube Two probably has a piece of broken glass in it

Tube Two measured 19

They tested as follows: 66/38

excellent flashing and what appears to be a US Navy logo on the base

This matched pair of GE 12B4A tubes was tested on our Paul Hart-calibrated TV7/U for shorts

it is probably plated

Minimum (65%) is 57/57 and 100% is 88/88

These five 26E5 tubes were tested (as 25 volt 6CM6s) on our Paul Hart-calibrated TV7/U for shorts

US-made number / type 89 tubes were tested on our Paul Hart-calibrated TV7/U for shorts

new in box Cunningham 14F7 tube tested to spec on our Paul Hart-calibrated TV7/U