Sylvania Number / Type 48 #48 Vacuum Tube Engraved / Stamped Base NOS-Testing October 17 2025 This lot of four European

This lot of four European PCL805 tubes was tested on our Paul Hart-calibrated TV7/U

new in box 1X2 tubes tested to spec on our Paul Hart-calibrated TV7/U

It is also autographed by Mr

TUBES ARE GUARANTEED GOOD ON SHIPMENT

It sounds very good with light surface noise and the occasional click and pop

Sylvania Number / Type 48 #48 Vacuum Tube Engraved / Stamped Base NOS-Testing October 17 2025 This lot of four EuropeanThis new old stock testing Sylvania engraved base type 48 tube was tested our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. It measured 80 where minimum (65%) is 50 and 100% is 77. It has a sheet getter; an anode radiator for cooler operation and longer tube life and a banded cross top mica spacer. WE HAVE SCORES OF THOUSANDS OF VACUUM TUBES. IF IT'S NOT LISTED, WE MAY HAVE IT. PLEASE ALSO SEE OUT ETSY