Voltage Drop (typical)Forward Voltage Drop (read from Telefunken AZ11 Ia=f(Ua) curve at 60 mA per plate)30V
Max C-input Filter CapacitorMax C-input Filter Capacitor60
Notes
The product of doubled transformer voltage and rectified current must not exceed 60,000 VA (same limit as AZ1).
Maximum alternating anode voltage: 2 x 500 Veff under normal conditions with reduced current.
German steel Y8A base — not compatible with Octal, P8A, or Rimlock bases.
Widely used in German radios — found in approximately 1,394 documented radio models.
Peak Inverse Voltage is not explicitly stated in the Telefunken/Philips AZ11 datasheet; PIV=1414 V is derived from the standard full-wave capacitor-input relation PIV = 2 × √2 × Va_max (500 Vrms). Matches the convention used for AZ12, UU4, UU5, EZ41 in this repo.
Vdrop=30 V is read from the Telefunken AZ11 single-plate I/V characteristic (Ia je Anode = f(Ua), Uf=4V) at 60 mA per plate (= Idc_max 120 mA / 2 for full-wave). The datasheet does not state a discrete Vdrop value.
Pin Layout — Y8A
1No Connection
2Heater
3Anode 1 (Plate 1)
4
Socket-Compatible Tubes ⚠ Not electrically compatible