WARNING: This is preliminary version of manual, I will update it later with pictures, more tube samples, and restoration walk-through. Please note this manual have some Cyrillic writings originally found on these devices, so make sure your browser display them correctly.
L1-3 and L3-3 are among the best and powerful transconductance . . . → Read More: L1-3/L3-3 Vacuum Tube/Valve Tester User Manual
