4 Ken-Rad Number / Type 76 #76 Vacuum Tubes Valves Lot Of Four 6AK5 3031

4 Ken-Rad Number / Type 76 #76 Vacuum Tubes Valves Lot Of Four 6AK5 3031This quad of Ken Rad MANUFACTURED 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 35, 46, 47 and 54 where minimum (65%) is 36 and 100% is 55. These tubes have black, rounded plates; phi shaped mica spacers; wire or mica snubbers (for low microphonics) and excellent flashing. WE HAVE SCORES OF THOUSANDS OF VACUUM TUBES. IF IT'S NOT LISTED, WE MAY

This lot of five Toshiba-MANUFACTURED 8FQ7 dual triodes was tested on our Paul Hart-calibrated TV7/U for shorts

Tubes Three and Four measured 1100 and 1150

new in box 12A7 tubes tested to spec on our Paul Hart-calibrated TV7/U

THAT LOSS RATE IS REFLECTED IN OUR PRICES

There was no gas and it tested 2170 micromhos with a plate current draw of 25

These tubes have black

Pictures Three and Four are included to underscore this fact

I have played them in my Musical Paradise 301 MK 3 with adapters (not included) as 6SJ7 substitutes and they sound excellent -- airy with excellent dynamics and signal bandwidth

Both have REI date codes

new in box GE 21GY5 tubes tested to spec on our Paul Hart-calibrated TV7/U

This lot of two new old stock

This new old stock-testing Silvertone round plate type 56 triode was tested on our Paul Hart-calibrated TV7 for shorts