Matched Pair RCA Clear Top 7AU7 Vacuum Tubes Valves NOS NIB 6SN7 Substitute With Adapters February 14 2024 mica snubbers for increased rigidity

mica snubbers for increased rigidity and lowered microphonics and excellent flashing

new in box Raytheon 6DS4 nuvistor tube tested to spec on our Paul Hart-calibrated TV7/U

Etsy will indicate how many remain in this Dutch auction

They have 7-09 188-5 and 630 188-5 date/provenance codes

new in box RCA 6JU8A tubes tested to spec on our Paul Hart-calibrated TV7/U

Matched Pair RCA Clear Top 7AU7 Vacuum Tubes Valves NOS NIB 6SN7 Substitute With Adapters February 14 2024 mica snubbers for increased rigidityThis new old stock, new in box matched pair of RCA Clear Top 7AU7 dual triodes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Tube One measured 78 73 while Tube Two measured 81 72 where minimum (65%) is 58. I am playing them in my Sound Craftsmen RC 2 monoblock amplifiers with the included adapters and they sound outstanding. They are dead quiet when just the amplifier is running and