Tung-Sol 6BZ8 X155 Vacuum Tube Valve NOS NIB March 13 2021 These eight Philco number /

These eight Philco number / type 77 tubes were tested on our Paul Hart-calibrated TV7/U for shorts

Sylvania-BRANDED 13GB5 / XL500 tube tested to spec on our Paul Hart-calibrated TV7/U

Transconductance measured 2100 micromhos for Tube One and 2175 for Tube Two

Transconductance measured 57 for Tube One and 65 for Tube Two where minimum (65%) is 36 and 100% is 55

Tung-Sol 6BZ8 X155 Vacuum Tube Valve NOS NIB March 13 2021 These eight Philco number /This new old stock, new in box Tung Sol 6BZ8 X155 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