Matched Pair Ken-Rad 6SJ7 Vacuum Tubes NOS-Testing Matched Pair 7C5 These four new old stock

These four new old stock

new in box Sylvania Gold Brand industrial 6AL5 / 5726 / 6097 tubes tested to spec on our Paul Hart-calibrated TV7/U

IN NEARLY 9000 SALES IN BOTH OF OUR ETSY STORES

This new old stock-testing matched pair of milspec RCA metal bottle JAN-CRC-6V6 output tubes was tested on our Maxi-Matcher 2 with 400 volts on the plates and a bias of -36 volts for shorts

This Amperex 8020 half-wave rectifier tube was tested on our Paul Hart-calibrated TV7/U

Matched Pair Ken-Rad 6SJ7 Vacuum Tubes NOS-Testing Matched Pair 7C5 These four new old stockThis new old stock testing, nicely matched pair of Ken Rad 6SJ7s was tested on our Paul Hart calibrated TV7 for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured 58 for Tube One and 60 for Tube Two where minimum (65%) is 40. They have G 5R and G SR date codes, respectively. I am playing them as I write in my Musical Paradise MP 301 MK3 and they sound excellent. They are microphonic and are fine in the preamp