Matched Pair Sylvania 6V6 6V6GT Light Gray And Silver Bottle Silver Top Vacuum Tubes Yale University new in box RCA 6AG7

new in box RCA 6AG7 tubes tested to spec on our Paul Hart-calibrated TV7/U

This black plate Sylvania 5U4GB rectifier tube tested 52/48 in Sections One and Two

new in box RCA 6LY8 tested to spec on our Paul Hart-calibrated TV7/U

This album sounds very good with a few pops and clicks in the quiet passages — of which there are not many

Tube One measured 76/76 and Tube Two measured 79/77 where minimum (65%) is 50/50

Matched Pair Sylvania 6V6 6V6GT Light Gray And Silver Bottle Silver Top Vacuum Tubes Yale University new in box RCA 6AG7This matched pair of silver top Sylvania 6V6GT output tubes was tested on our Maxi Matcher 2 for shorts, gas and transconductance. There were no shorts or gas. Plate current measured 15. 7 milliamps and transconductance was 2120 micromhos for Tube One. Tube Two measured 16. 3 2280. (New US made 6V6s typically test with plate current from the mid teens to mid 30s with transconductance from 2300 micromhos or so.) They have tall bases; nice flashing;