3 US-Made 6F7 Vacuum Tubes Mesh Plate Shoulder Style Bottle NOS NIB Lot Of Three Vostok Amphibia Link Both tested 52/52 where minimum

Both tested 52/52 where minimum (65%) is 40/40

This pair of Tung-Sol type 76 triodes was tested on our Paul Hart-calibrated TV7/U for shorts

This trio of Toshiba output tubes was tested on our Maxi-Matcher in Real World Conditions with 400 volts on the plates and a bias of -36 volts for shorts

This new old stock-testing

This new old stock-testing milspec

3 US-Made 6F7 Vacuum Tubes Mesh Plate Shoulder Style Bottle NOS NIB Lot Of Three Vostok Amphibia Link Both tested 52/52 where minimumThese new old stock, new in box US made 6F7 tubes tested to spec on our Paul Hart calibrated TV7 U. They have late 1930s retro styling with coke bottle glass envelopes and mesh plates. 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