Data: MediumMedium quality — at least 60% of universal parameters and pins are present, but some key data is missing. Verify specific values against datasheets before critical use.
Companion 2V battery DHT with same filament voltage and UX4 base, but designed as detector/voltage amplifier with higher mu (~9.3) and lower current (3mA vs 12mA)
Raytheon data gives Ia=8mA and ra=4100 Ohm at the same Va=180V, Vg=-30V operating point — discrepancy likely due to different measurement conditions or sample variation.
No Pa_max or Rg_max is specified on known datasheets.
Pin Layout — UX4
1Filament (f-)
2Plate (Anode)
3Grid
4Filament (f+)
Socket-Compatible Tubes ⚠ Not electrically compatible