Sylvania 15KY8 Vacuum Tube Valve NOS NIB ROC Biography This lot of five Sylvania

This lot of five Sylvania 25AV5GA tubes tested to spec on our Paul Hart-calibrated TV7/U

Transconductance measured 56 for Tube One and 57 for Tube Two where minimum (65%) is 40

5 standard deviations of 3600 micromhos and tend to be rather erratic readings-wise like their 12AT7 cousins)

but I would step it up to an 8 or so as this sound striping recording is truly cutting edge

Sylvania 15KY8 Vacuum Tube Valve NOS NIB ROC Biography This lot of five SylvaniaThis new old stock, new in box Sylvania 15KY8 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 HAVE IT.