3 Sylvania 6R7 6R7GT Vacuum Tubes NOS NIB Lot Of Three

3 Sylvania 6R7 6R7GT Vacuum Tubes NOS NIB Lot Of ThreeThere are three new old stock, new in box Sylvania MANUFACTURED, GM LABELLED 6R7GT tubes in this lot. They have 312 EIA codes, indicating they were made by 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

Tube Three (diodes): 60/46

It measured 79 where minimum (65%) is 32 and 100% is 49

They tested 51/52

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

Please be sure your device has enough current to run them

Tube One measured 31 while Tube Two measured 33 where minimum (65%) is 22

CHINA IS AN EXCELLENT EXAMPLE

(New US-made 6BG6s typically test with plate current readings from the mid 20s to mid 50s with transconductance within a standard deviation of 2300 micromhos or so

anode radiators for cooler operation (and longer tube life) and hot-stamped/engraved bases

Tube One has some oxide flaking

clear recording with sparking highs and nice bass

rounded dark-gray plates