Matched Pair RCA 5763 Vacuum Tubes Valves June 04 2025 new in box Zenith 17AY3

new in box Zenith 17AY3 / 17AY3A / 17BS3 / 17BS3A tubes tested to spec on our Paul Hart-calibrated TV7/U

This windup ladies' gold-anodized Acqua (Timex's equivalent of Tudor) watch keeps fairly-good time and has never been serviced to my knowledge

The 7025 has somewhat-different gain characteristics than the standard 12AX7

I have played it (with an adapter) in one of my AC-heated Sound Craftsman RC2 amplifiers and it sounds great

Matched Pair RCA 5763 Vacuum Tubes Valves June 04 2025 new in box Zenith 17AY3This matched pair of RCA gray plate 5763 tubes were tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured 44 and 48 where minimum (65%) is 35 and 100% is 54. These tubes have gray plates and nice flashing. 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