4 US-Made 7A7 Vacuum Tubes Valves Lot Of Four T34

4 US-Made 7A7 Vacuum Tubes Valves Lot Of Four T34These four US made 7A7 tubes tested as follows on our Paul Hart calibrated TV7 U where minimum (65%) is 44 and 100% is 68: 44, 49, 50 and 55, 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 "LOWTECHELEC" 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 SHIPPING EXCEPT MEDIA MAIL ARE AUTOMATICALLY INSURED UP

I have played it in my Musical Paradise 301 MK 3 and it sounds excellent -- airy with excellent dynamics and signal bandwidth

please select “2” from the quantity box

This trio of RCA 6K7 tubes were tested on our Paul Hart-calibrated TV7/U for shorts

and Tube One has a TE4 date code

THE PRODUCT DEVELOPMENT AND IMPROVEMENT CYCLE IS OVER

These nine RCA 17BE3 / 17BZ3 tubes tested to spec on our Paul Hart-calibrated TV7/U

58 and 67 where minimum (65%) is 48

9 milliamps where new 6L6GCs typically test with plate current from the low 20s to mid 30s and transconductance from 2200 micromhos or so

This lot of three Sylvania 12Q7G tubes tested to spec on our Paul Hart-calibrated TV7/U

I have played this tube in my Bottlehead Crack headphone amplifier and it sounds excellent

I will test it

These matched pair of engraved-base