6CK5
6CK5 is also designated EL41.
Description
The 6CK5 is a power amplifier pentode. It has a glass bulb and a coated unipotential cathode, and uses an E 8-30 base. It may be mounted in any position.
Construction
The tube has a maximum overall length of 2-31/32 inches (76 mm), a maximum seat height of 2-23/32 inches (69 mm), and a maximum diameter of 7/8 inch (22 mm). The heater is rated at 6.3 volts and 0.7 amps.
Electrode Arrangement and Capacitances
Pin 1 is the heater, pin 2 is the plate, pin 3 is an internal connection, pin 4 is an internal connection, pin 5 is Grid No. 2, pin 6 is Grid No. 1, pin 7 is the cathode and Grid No. 3, and pin 8 is the heater. The plate-to-Grid No. 1 capacitance is less than 1.0 μμF, and the Grid No. 1-to-heater capacitance is less than 0.15 μμF. Input capacitance is 10.2 μμF and output capacitance is 7.8 μμF.
Release Information
The JETEC release #1526, dated Oct. 10, 1955, describes the 6CK5.
| Designation | Evidence | Confidence |
|---|---|---|
| EL41 | 45 independent documents | confirmed |
Equivalence is asserted only where the archive's own literature states it directly, in at least 40 separate documents. Tubes that merely substitute in some circuits are not listed here.
Original manufacturer datasheets for 6CK5, hosted by Frank Philipse's Electron Tube Data sheets.
| Manufacturer | Designation | Datasheet |
|---|---|---|
| Philips | 6CK5 | PDF (88 KB) |
| Philips | EL41 | PDF (591 KB) |
| Philips | EL41 | PDF (561 KB) |
| Mullard | EL41 | PDF (123 KB) |
| Mazda-Belvu | EL41 | PDF (117 KB) |
| La Radiotechnique | EL41 | PDF (74 KB) |
| Brimar | EL41 | PDF (46 KB) |
Documents held here and used to write this page.
- Operating characteristics of 2 valves as Class A push-pull amplifier (without grid current) (see Fig. 8) (filed under EL41)
- TUBE TYPE 6CK5
1 further designation appears alongside 6CK5 in the literature but below the evidence threshold used here, so it is not listed as equivalent.