National Union NU 14J7 Vacuum Tube Valve NOS NIB JANCKR6AG7 6 milliamps with a transconductance

6 milliamps with a transconductance of 3060 micromhos while Tube Two measured 24

This is an original recording from 1939 and it sounds 15-20 years ahead of its time

I am playing them in my Bottlehead Crack headphone amplifier as I write

Transconductance measured 21

There were many pops and ticks

National Union NU 14J7 Vacuum Tube Valve NOS NIB JANCKR6AG7 6 milliamps with a transconductanceThis new old stock, new in box National Union 14J7 tube tested to spec on our Paul Hart calibrated TV7 U. BECAUSE OF THE BIZARRE, INTRUSIVE, CRUEL AND DRACONONIAN GERMAN PACKAGING REGULATIONS AND THE SEVERE FINES AND PRIVACY INTRUSIONS ASSOCIATED WITH THEM WE NO LONGER SHIP TO GERMAN ADDRESSES. WE WILL HAPPILY SEND YOUR PACKAGE TO A NEIGHBORING COUNTRY OR MAKE SUITABLE ARRANGEMENTS. IN 2021 WE PURCHASED 150,000 VACUUM TUBES. IF IT'S NOT LISTED, WE