2 US-Made Number / Type 89 #89 Vacuum Tubes Valves NOS NIB Lot Of Two 5V6GT Octal They are dead quiet when

They are dead quiet when the preamp is muted and have excellent frequency response

They are slightly microphonic

Tube One measured 50/50 while Tube Two measured 49/54 where minimum (65%) is 25/25 and 100% is 38

It is dead quiet when the preamp is muted and has excellent frequency response

2 US-Made Number / Type 89 #89 Vacuum Tubes Valves NOS NIB Lot Of Two 5V6GT Octal They are dead quiet whenThese two new old stock, new in box US made number type 89 tubes tested to spec on our Paul Hart calibrated TV7 U. One has a glass bottle; the other, metal.. IN 2021 WE PURCHASED 150,000 VACUUM TUBES. IF IT'S NOT LISTED, WE MAY HAVE IT. PLEASE ALSO SEE OUR 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 OF THE TUBES WE SELL ARE OVER 70 YEARS OLD. WE CANNOT GUARANTEE