Matched Pair Cunningham 6SJ7 Vacuum Tubes

Matched Pair Cunningham 6SJ7 Vacuum TubesThis matched pair of Cunningham 6SJ7 tubes was tested on our on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured 44 for Tube One and 46 for Tube Two where minimum (65%) is 40 and 100% is 62. They have 9 22 RE5 and 9 22 codes, respectively. 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

These tubes have dark-gray

These tubes are the equivalent of the Chinese / Russian 6J1 and 6J2

Tube One (12B4

Transconductance readings are indicated on the tops of the tubes

It is dead quiet when the preamp is muted and has excellent frequency response even though this amp was designed for 6SN7s

The spine is in fine shape with no loose pages and its dust jacket is also in fine shape

6 milliamps/2150 micromhos and 18

(New US 6L6GCs typically test with plate current from the low 20s to mid 30s with transconductance from 2200 micromhos or so

Noise: -83

The spine is in fine shape with no loose pages and the dust jacket has no rips or missing parts

good flashing and an 817 date code

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