PhilipsData: 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.
Electrically identical Philips designation with P8A base — not pin-compatible
Electrical Specifications
Absolute Maximum
Anode Voltage (max)Anode Voltage (max)275V
Screen Voltage (max)Screen Voltage (max)275V
Anode Dissipation (max)Anode Dissipation (max)18W
Typical Operating
Anode Voltage (typical)Anode Voltage250V
Notes
The 'K' suffix indicates the Rimlock/Octal (K8A) base variant. The original 4689 uses the P8A side-contact base. These are genuinely different tubes despite identical electrical characteristics.