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Volumes

1. Vol 1 Overview: What This Tube Tester Is and the Emission-vs-Gm Question A 5 kHz oscillator, a grid, and a meter reading gain directly in micromhos — the kit-built answer to a question the emission tester can't ask
2. Vol 2 How It Works: The Test Method and Circuit Two tubes, five kilohertz, and a roll chart — how a 1959 kit instrument turns a grid signal into a transconductance reading in micromhos.
3. Vol 3 Inside the Unit: Hardware, Meter, Sockets and Setup One illuminated meter, one built-in roll chart, and a bank of rotary switches stand between a roll of solder and a professional-grade Gm reading.
4. Vol 4 Using It: Setting Up and Grading a Tube A working tube-tester's operator manual, rewritten as a bench logbook: roll chart to reject figure, one lever at a time.
5. Vol 5 Refurbishing and Calibration A 60-plus-year-old kit built around silicon rectifiers, paper caps, and a filament capacitor that gets more dangerous the longer it sits — here is how to bring one back safely.
6. Vol 6 Cheatsheet and Emission vs Gm: the Two-Tester Bench The laminate-ready card — quick specs, the roll-chart-to-µmhos operating sequence, the refurb order, the safety envelope, and the emission-vs-Gm comparison that is the whole point of running this tester alongside the Supreme 385