Ken Rad/G.E. 1953 Long grey pewter plates, H.S. Top getter 12AU7This tube was screened for Audio by second party. This pre amp tube has an Excellent full range 3d sound stage, they compare with Mullard D getter and similar tubes, A very low noise and low microphonic's tube with spiral heaters and good construction. This tube is very hard to find in this condition, plates are matched, almost perfect 2150/2150 on average some pairs higher, none lower than 2000, n...ew spec Hickok 800A 2200Absolutely wonderful sounding tubeSatisfaction guaranteed. Feedback left: Greetings. Installed the Ken Rads a few days ago. Beautiful tubes, not unlike RCA long black plates, but the Ken Rads seem both wider in soundstage, and a bit "smoother". Rich all around, but plenty of detail. Really nice. These are staying. Sold in matched pairs only