Matched Quad Sylvania 12AU7 12AU7A ECC82 Vacuum Tubes CONN-Selected NOS-Testing

Matched Quad Sylvania 12AU7 12AU7A ECC82 Vacuum Tubes CONN-Selected NOS-TestingThis new old stock testing matched quad of Sylvania MANUFACTURED, CONN BRANDED and SELECTED 12AU7A ECC82 dual triodes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured 81 82 for Tube One and 81 85 for Tube Two. Tubes Three and Four measured 84 80 and 81 85, respectively where minimum (65%) is 56 56 and 100% is 86 86. These tubes were selected by CONN Organ for

This Swiss-made Mimo men's watch may look rather small

These six RCA black plate RCA 50B5 tubes were tested on our Paul Hart-calibrated TV7/U for shorts

Both tubes have 2-48 SC 471 date/contract codes and are World War Two vintage

This Matsushita-MANUFACTURED

5 record cleaner and then played it on my solid state rig which consists of a Rega Planar Three with an Ortofon X5-MC cartridge on an RB-300 tone arm with an Adcom GFP-555 II preamp feeding a Hafler SE240 power amplifier and PSB Alpha near-field monitors

This matched pair of Ken-Rad 6AU6 tubes was tested on our Hickok 800 for shorts

Magnavox-LABELLED 6CW5 tube tested to spec on our Paul Hart-calibrated TV7/U

This lot of two Philco 12Q7GT tubes tested to spec on our Paul Hart-calibrated TV7/U

For sale are three new old stock

new in box Zenith 6AD7G tube tested to spec on our Paul Hart-calibrated TV7/U

52/52 and 53/52 where minimum (65%) is 40/40 and 100% is 62/62

These three CBS 6K6GT tubes were tested on our Maxi Matcher 2 with 325 volts on the plates and a bias of -36 volts for shorts