Tung-Sol 25BK5 Vacuum Tube Valve NOS NIB 12B4A NOS-Testing Transconductance was 2810 micromhos for

Transconductance was 2810 micromhos for Tube One and 2900 for Tube Two

16 MM plates

new in box Mullard UBC41 tube tested to spec on our Paul Hart-calibrated TV7/U

This lot of three Sylvania-MANUFACTURED number 19 tubes was tested on our Paul Hart-calibrated TV7/U for shorts

I am writing during the first few pianissimo minutes and the surface noise is distracting

Tung-Sol 25BK5 Vacuum Tube Valve NOS NIB 12B4A NOS-Testing Transconductance was 2810 micromhos forThis new old stock, new in box Tung Sol 25BK5 tube tested to spec on our Paul Hart calibrated TV7 U. BECAUSE OF THE BIZARRE, INTRUSIVE, CRUEL 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