Matched Pair Zenith 7B8 Vacuum Tubes

Matched Pair Zenith 7B8 Vacuum TubesThis matched pair of Zenith 7B8 tubes tested as follows on our Paul Hart calibrated TV7 U where minimum (65%) is 29 and 100% is 45: 34 and 36, 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 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

new in box Sylvania 6SH7 tubes tested to spec on our Paul Hart-calibrated TV7/U

This Canadian Marconi 6K8G tested to spec on our Paul Hart-calibrated TV7/U

I am playing them in my Sound Craftsmen RC-2 monoblocks (as an "excellent" 6SN7 substitute according to Antique Electronic Supply's "Tube Substitution Guidebook") with "Hanson Conducts Ives

This was originally a package that contained five and two have been used

I am playing it now in my Musical Paradise 301 MK 3 (with an adapter

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

Transconductance was 2810 micromhos for Tube One and 2900 for Tube Two

noise or gas

It measured 42/34 where minimum (65%) is 40/40 and 100% is 62/62

new in box Raytheon 12DW8 tube tested to spec on our Paul Hart-calibrated TV7/U

It was made in USA

The spine is in fine shape with no loose pages