3 General Electric GE 21GY5 Vacuum Tubes Valves NOS NIB Lot Of Three VT222 884 Vintage

3 General Electric GE 21GY5 Vacuum Tubes Valves NOS NIB Lot Of Three VT222 884 VintageThese three new old stock, new in box US Made 21GY5 tubes tested to spec on our on our Jackson 648. 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 UP TO

This lot of three Sylvania-MANUFACTURED number 19 tubes was tested on our Paul Hart-calibrated TV7/U for shorts

They have engraved bases

top O getters and two additional support rods for increased ruggedness and microphony suppression

(New 6GU7s typically test from within a half standard deviation of 2000 micromhos and the Jackson expresses this in terms of a percentage

new in box milspec RCA 3Q4 / JAN3Q4 tube tested to spec on our Paul Hart-calibrated TV7/U

I’m playing it now in one of my Radio Craftsman RC-2 mono blocks and it sounds great

This Sylvania 6BS8 tube tested to spec on our Paul Hart-calibrated TV7/U

Transconductance was 1900 for Tube One and 1800 for Tube Two where new/nominal is within one standard deviation of 1900

Flashing Quality: good

34/34 and 38/41 where minimum (65%) is 25/25 and 100% is 38/38

top O getters and large anode radiators for cooler operation and extended tube life

This perfectly-matched pair of RCA steel plate 6AK5 tubes was tested on our Paul Hart-calibrated TV7/U tester for shorts