Tube One: 110 / 101 (Sylvania 6SL7GT and code ADL stenciled glass)
Tube Two: 100 / 110 (Remnants of Sylvania 6SL7GT stenciled glass)
Good readings in the Jackson 648 are between 70 - 130. Tube One tests 110% / 101% and Tube Two tests 100% / 110%.
Listened to them in our Alan Eaton amp and they sound outstanding. Tubes are tight on base with no debris or rattling. This pair have black plates, a top halo getter and silver tops. (When I cleaned off the glass of Tube Two the stenciling came off but the pictures in the amp from before I cleaned the glass shows that it is a Sylvania tube). Tubes will ship in their original Sylvania boxes.
Check out more tubes on our store for your equipment needs.
Tubes ships via United States Postal Service (USPS) Ground Advantage with tracking for domestic U.S. sale; Priority Mail is an option if you wish your package
delivered quicker. International orders ship via USPS First Class Mail International.
Package weighs eight (8) ounces.
Combined shipping always welcomed.
TUBES ARE GUARANTEED GOOD AND IN WORKING ORDER AT SHIPMENT. TRANSIT VIA POST CAN DAMAGE TUBES. THIS IS NO FAULT OF OURS BUT THE THIRD PARTY ENTITY THAT IS DELIVERING ITEM(S) TO YOU, I.E, USPS, UPS, FEDEX, YOUR NATIONAL CARRIER IF INTERNATIONAL, ETC. PLEASE INSURE THEM! WE CANNOT GUARANTEE FAILURES ON YOUR EQUIPMENT AFTER POWER UP AS THERE IS NO WAY TO ASCERTAIN HOW TUBES WILL INTERACT WITH YOUR ELECTRONICS; NOR IS THERE A WAY TO DETERMINE WHETHER THEY MAY HAVE FATAL FLAWS IN TUBES THEMSELVES! THESE ARE USED VACUUM TUBES AND TIME MAY HAVE TAKEN A TOLL ON THEM OVER THE MANY YEARS SINCE THEY WERE MANUFACTURED. WE CAN ONLY TEST FOR THE PARAMETERS MENTIONED ABOVE IN ONE OR MORE OF THE FOLLOWING EQUIPMENT WE USE FOR MEASURING: TV-7/U, JACKSON 648 & MAXI MATCHER 2.