Voltage Drop (typical)Tube Voltage Drop (estimate)45V
Max C-input Filter CapacitorMax C-input Filter Capacitor16µF
Notes
Half-indirectly heated cathode.
Before 1951 the UU6 was manufactured with metallising on the bulbs connected to pin 6.
Mazda Octal (MO) base variant — verify pin compatibility with standard International Octal.
Peak Inverse Voltage is not explicitly stated in the Mullard/Mazda UU6 datasheet; PIV=990 V is derived from the standard full-wave capacitor-input relation PIV = 2 × √2 × Va_max (350 Vrms). Matches the convention used for AZ12, UU4, UU5, EZ41 in this repo.
Vdrop ≈ 45V derived from Mazda UU6 datasheet typical-operation table (Vtr=2×350V, Io=120mA → Vo=395V with very low transformer resistance, Cres=8µF). Ideal cap-input peak ≈ 495V; total drop ~100V includes cap-charging regulation; pure tube Vdrop ~45V. Source: Mazda UU6 datasheet.
Pin Layout — Octal
1No Connection
2Heater
3Anode 1 (Plate 1)
4
Socket-Compatible Tubes ⚠ Not electrically compatible