3 RCA 6U7 Vacuum Tubes Valves Lot of Three 6AG7 Octal Metal

3 RCA 6U7 Vacuum Tubes Valves Lot of Three 6AG7 Octal MetalThese three RCA MANUFACTURED 6U7 tubes were tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. They tested (from left to right) as follows: 36, 42 and 56 where minimum (65%) is 40. 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 FORMS OF

I have played them with adapters (not included) in my Radio Craftsmen RC-2 monoblocks and they sound outstanding

They have REI and Y3E date codes

I am playing them as I write in my Alan Eaton AC-heated single-ended 45 amplifier with Pink Floyd’s "The Wall" as 6SN7 substitutes and they sound terrific

58 and 60 where minimum (65%) is 42

new in box RCA 12AJ6 tube tested to spec on our Paul Hart-calibrated TV7/U

These matched quad of RCA milspec JRC-6H6 / 6H6 / VT-90 6H6 tubes was tested on our Paul Hart-calibrated TV7/U

I am playing them in my Musical Paradise MC-3 single-ended integrated amplifier as I write with Aimee Mann's seminal "Magnolia" album and it sounds terrific

Transconductance was 1890 for Tube One and 2000 for Tube Two where new/nominal is within one standard deviation of 1900

They tested 53

There were no shorts or gas and they measure as follows:

The GEs are civilian and the National Union is milspec

It teats below spec but should work fine in many applications