This new old stock-testing Matched Pair RCA 12BH7A Tubes with gray ribbed plates, top halo getter and silver tops were tested on our recently calibrated TV-7/U.
Tube One: 53 / 56 (118% / 124%; RCA and 12BH7A stenciled on glass; can not make out any codes - rubbed off)
Tube Two: 56 / 57 (124% / 126%; RCA and 12BH7A stenciled on glass; can not make out any codes - smeared; RCA faintly remaining on glass)
Minimum is 30 (65%) and 45 is 100%.
Sound tested the pair in our Alan Eaton amp with adapters and sound excellent. Gray ribbed plates, top halo getter with silver tops. This pair tests very strong with each tubes above 100%.
Shipping is First Class with tracking in the United States; Priority Mail delivery is an option. International
sales via USPS First Class International Mail/Package. International buyers wishing tracking and insurance
must purchase USPS Priority Mail International. Package weighs eight (8) ounces.
Combined shipping welcome.
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, MAXI MATCHER 2 & JACKSON 648.