Trigon UCH81 19D8 Vacuum Tube NOS NIB September 13 2022 The spine is in fine

The spine is in fine shape with no loose pages

but I do not recommend using them at any other filament voltage than 12

This is a testament to their high emissions

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Trigon UCH81 19D8 Vacuum Tube NOS NIB September 13 2022 The spine is in fineThis new old stock, new in box Trigon UCH81 tube tested to spec on our Paul Hart calibrated TV7 U. WE HAVE SCORES OF THOUSANDS OF VACUUM TUBES. IF IT'S NOT LISTED, WE MAY HAVE IT. PLEASE ALSO SEE OUT ETSY SISTER SITE "LOWTECHTWOO" AND OR CALL OR TEXT US AT 202 372 6931 IF YOU DO NOT SEE WHAT YOU NEED OR HAVE ANY QUESTIONS. 1. MOST FORMS OF SHIPPING EXCEPT MEDIA MAIL ARE AUTOMATICALLY INSURED UP TO $100. ETSY PURCHASE PROTECTION COVERS ITEMS UP TO $250