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2498 |
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| A power output pentode with the international octal (8-pin) base, primarily for the output stages of audio power amplifiers. The valve was especially designed with push-pull 'ultra-linear' (distributed load) operation in mind. Given the appropriate output transformer, pure class A up to 15W and 'ultra-linear' up to 20 or 30W is possible, or class B up to 100W. The valve is able to cope with peak anode voltages of up to 800V, and connections between the glass envelope and pins on the bonded octal base are carefully arranged to |
| prevent flash-over. Several application circuits for different output powers are shown in the booklet. Although highly rated, the EL34 is of a comparatively small physical size compared with contemporary equivalents. Maximum rated anode dissipation is 25W. |
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Rk |
106 |
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Ra |
2· 0k |
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