6 RCA 50B5 Vacuum Tubes Black Plate Lot Of Six 6LU8 T52

6 RCA 50B5 Vacuum Tubes Black Plate Lot Of Six 6LU8 T52These six RCA black plate RCA 50B5 tubes were tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas and they measured as follows: 40, 44, 48, 48, 61 and 66 where minimum (65%) is 45. 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

new in box GE 8CG7 / 8FQ7 tubes tested to spec on our Paul Hart-calibrated TV7/U

This lot of six Sylvania number / type 58 stamped- / engraved-base tubes was tested on our Paul Hart-calibrated TV7/U for shorts

It's a bit worn in places

Unfortunately I can't tell you how they sound as we do not have any equipment that uses them nor do we have adapters at this time

new in box Zenith 17CK3 tubes tested to spec on our Paul Hart-calibrated TV7/U

I have played it in my Alan Eaton singe-ended 45 amplifier (at 6

Minimum (65%) is 44

top O getters

There were no playback issues

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

There are practically-no pops and ticks

This matched pair of RCA 12SN7GT dual triodes was tested on our Paul Hart-calibrated TV7 for shorts