3 Sylvania 7W7 Vacuum Tubes NOS NIB Lot Of Three

3 Sylvania 7W7 Vacuum Tubes NOS NIB Lot Of ThreeThese three new old stock, new in box Sylvania 7W7 tubes tested to spec on our Paul Hart calibrated TV7 U. Three are GE and two are Sylvania. 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

A 8 or so out of ten

This matched pair of new old stock-TESTING Sylvania 6L6GC "Uncle Doug" output tubes was tested on our Maxi-Matcher with 400 volts on the plates and a bias of -48 volts for shorts

It measured 53/47 where minimum (65%) is 40/40 and 100% is 62/62

5 or so out of ten

On the TV7/U

IN OVER 8000 TRANSACTIONS

Tube One has 3225730-3 provenance/date codes

5 record cleaner and then played it on our Rega Planar Three

both with current readings of 34 and transconductance of 3520

THE PRODUCT DEVELOPMENT AND IMPROVEMENT CYCLE IS OVE

Both tubes measured 25 where minimum (65%) is 22

double-D getter and a 337 2R48 date / provenance code