3 US-Made 6F7 Vacuum Tubes Mesh Plate Shoulder Style Bottle NOS NIB Lot Of Three Vostok Amphibia Link It has shiny black plates

It has shiny black plates

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

excellent flashing and super-shiny pins

Transconductance measured 41/42 where minimum (65%) is 21

new in box RCA 17KV6 tubes tested to spec on our on our Paul Hart-calibrated TV7/U

3 US-Made 6F7 Vacuum Tubes Mesh Plate Shoulder Style Bottle NOS NIB Lot Of Three Vostok Amphibia Link It has shiny black platesThese 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