4 Zenith 17AY3 17AY3A 17BS3 17BS3A Vacuum Tubes Valves NOS NIB Lot Of Four With Shields 14 MM plates straddled by

14 MM plates straddled by half-moons

1 milliamps with a transconductance of 2260 micromhos while Tube Two measured 23

34/34 and 38/41 where minimum (65%) is 25/25 and 100% is 38/38

They have engraved / hot-stamped bases on is Champion-branded and the other is Zenith

These tubes have top and side black / dark-gray bottles

4 Zenith 17AY3 17AY3A 17BS3 17BS3A Vacuum Tubes Valves NOS NIB Lot Of Four With Shields 14 MM plates straddled byThese four new old stock, new in box Zenith 17AY3 17AY3A 17BS3 17BS3A tubes 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 OF THE TUBES WE SELL ARE OVER 70 YEARS OLD. WE CANNOT GUARANTEE FOR FAILURES AFTER POWER UP AS