Brand: Unknown · SKU: 4694-246INC1 · MPN: 4694 · Category: Components
The 4694 is an indirectly-heated steep-slope 9W pentode. In balanced stages, the available output is 12 to 13W, making the valve attractive for use in 10W amplifiers. The maximum anode voltage is 400V, with the screen potential being slightly higher at 425V to accommodate voltage drop across the output transformer. This design avoids the need for a screen voltage divider, thus preventing associated losses and ensuring output is not reduced by screen voltage decreases at maximum modulation. The valve's high working voltages allow for highly sensitive pre-amplification stages, and its high mutual conductance results in extremely low alternating grid voltage, necessitating automatic grid bias. Static data includes heater ratings (6.3V, 0.9A), capacitances (Anode-grid ≤ 0.8pF), and operating points such as anode voltage (400V), screen-grid voltage (425V), grid bias (-15.6V), anode current (22mA), screen-grid current (2.8mA), mutual conductance (7mA/V), and internal resistance (75,000 ohms)
| Grid Bias | -15.6 V |
|---|---|
| Power Output | 13 W |
| Anode Current | 22 mA |
| Anode Voltage | 400 V |
| Heater Current | 0.9 A |
| Heater Voltage | 6.3 V |
| Operating Class | Class AB |
| Mutual Conductance | 7 mA/V |
| Internal Resistance | 75,000 ohms |
| Screen-Grid Current | 2.8 mA |
| Screen-Grid Voltage | 425 V |
| Anode-Grid Capacitance | ≤ 0.8 pF |
| Common Cathode Resistor | 315 ohms |
| Number of Valves (Class AB) | 2 |
| Anode Current (Max Modulation) | 2 x 25 mA |
| Load Resistor (between anodes) | 20,000 ohms |
| Screen Current (Max Modulation) | 2 x 6.2 mA |
| Warranty | Not Available |
| Weight | Unknown |
| Dimensions | Dimensions in mm. |
The 4694 is an indirectly-heated steep-slope 9W pentode designed for audio amplifiers, offering an output of 12-13W in balanced stages. It operates with high anode (400V) and screen (425V) voltages, facilitating sensitive pre-amplification and avoiding voltage divider losses. Automatic grid bias is required due to its low alternating grid voltage.
Yes, this 4694 (4694-246INC1) is 100% genuine Unknown hardware. All our products are verified by certified technicians and come with clean serial numbers ready for service contract registration.
This 4694 includes our standard 3-Year Warranty covering all manufacturing defects. We also offer advanced replacement options for minimal downtime.
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Yes, we have a 30-day return policy on all products. Restocking fees may apply for opened items. Please see our return policy for complete details.
Please check the specifications tab for detailed compatibility information. Our technical team is available to assist with compatibility questions for the 4694-246INC1.