6 RCA 13J10 13Z10 Vacuum Tubes NOS NIB Lot Of Six 12SW7 T08 These four US-made 6SF7 tubes

These four US-made 6SF7 tubes were tested on our Paul Hart-calibrated TV7/U for shorts

new in box RCA 6GY5s tubes tested to spec on our Paul Hart-calibrated TV7/U

This matched pair of Cunningham / RCA 6F5s were tested on our Paul Hart-calibrated TV7/U for shorts

They tested (from left to right) as follows: 56 and 59 where minimum (65%) is 40

25 out of ten

6 RCA 13J10 13Z10 Vacuum Tubes NOS NIB Lot Of Six 12SW7 T08 These four US-made 6SF7 tubesThese six new old stock, new in box RCA 13J10 13Z10 tubes tested to spec on our Paul Hart calibrated TV7 U. 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 TO $100. ETSY PURCHASE PROTECTION COVERS ITEMS