2 National Union NU 117Z4 117Z4GT Vacuum Tubes Valves NOS NIB Lot Of Two LowtechTwoo 8K giving you not only a

giving you not only a different sonic signature because of that characteristic

They have narrow gray plates and O getters

It has a bottom

The Hickok-tested 6AV5 tested 4200 micromhos where new/nominal is 3900

Transconductance measured (From left to right): 42

2 National Union NU 117Z4 117Z4GT Vacuum Tubes Valves NOS NIB Lot Of Two LowtechTwoo 8K giving you not only aThese two National Union 117Z4GT tubes tested to spec on our Paul Hart calibrated TV7 U. BECAUSE OF THE BIZARRE, INTRUSIVE 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 PROBABLY HAVE IT. PLEASE