3 RCA 12AU7 12AU7A ECC82 Black Plate Vacuum Tubes Lot Of Three JANCTL6098 Milspec These tubes have engraved bottles

These tubes have engraved bottles

I am playing it in my Pro-Ject Tube Box S phono pre-preamplifier (tube on right) with John Mayall’s seminal "The Blues Alone" album

This hardcover book is in fair condition

It was stored in a cool

3 RCA 12AU7 12AU7A ECC82 Black Plate Vacuum Tubes Lot Of Three JANCTL6098 Milspec These tubes have engraved bottlesThis trio of RCA black plate 12AU7A ECC82 dual triodes was tested on our Paul Hart calibrated TV7 U for shorts, gas and transconductance. There were no shorts or gas. Transconductance measured 60 79, 66 58 and 82 72, respectively where minimum (65%) is 56 56 and 100% is 86 86. They have matte, black 17MM plates; slanted D getters; steel support rods and excellent flashing. I have played them in my Radio Craftsmen RC 2 monoblocks (with adapters, not