Zenith 2BU2 2AS2 2AS2A 2AH2 Vacuum Tube Valve NOS NIB Winsbadener Eterna They are dead quiet when

They are dead quiet when just the amplifier is running and have excellent frequency response

It measured 40 where minimum (65%) is 31

These are 6N7 tubes

They have NU 188-5 and 3-09 188-5 date/provenance codes

Zenith 2BU2 2AS2 2AS2A 2AH2 Vacuum Tube Valve NOS NIB Winsbadener Eterna They are dead quiet whenThis new old stock, new in box Zenith 2BU2 2AS2 2AS2A 2AH2 tested to spec on our Paul Hart calibrated TV7 U. BECAUSE OF THE BIZARRE, INTRUSIVE AND DRACONIAN 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