These have large black plates, are ruggedized with extra support rods, and have 1955 dates (5-17 and 5-39). They were tested on our Triplett 3444A tester with results of 2100/2100 and 2050/2150, where 2200 per section is the expected new value and 1400 is the acceptable minimum.
Item Tag: 5692
-
Pair of Sylvania (West. lbl) 5692 Brown Base NOS NIB Vacuum Tubes – 9% matched
Fine pair of Sylvania 5692 brown base tubes, labeled for Westinghouse, with original boxes. Gm matched to about 9% difference on the Amplitrex AT1000. Shiny black plates, micanol bases, multiple support rods, thick glass, triple micas, and double getters all make for a bulletproof tube.
-
RCA 5692 preamp tubes premium 6SN7 tested strong and matched pair
One pair of RCA 5692 tubes. TV-7D/U tested at 100, 95 and 93, 90.