This is a factory matched pair of the highly regarded EL34BW valve from Shuguang, with improved Anode maximum power dissipation for high gain, better reliability, longer life and less "red plating" when pushed hard (upgraded equivalent to the US tube part number 6CA7).
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HT with the 2x EL34 it may have been rated upto around 150mA. HT w/CT= Red - Red/Yellow - Red [Red to Red = 62ohm].
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All power valves individually tested on AVO160. Don’t ask! It’s listed elsewhere too so I may end the sale without notice. Plate Dissipation 50% warm. Passed as good / worn (No shorts or leaks). The condition as stated is very good all round, the only notable issue is one of the top plate fixing points is broken, this is visible in the pictures.
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Stereo 40 MK IV 6L6 is a simplified version of more expensive KT88 version. In line with our other amplifiers there are many valve and capacitor upgrade options like the Genalex KT66 and Tung Sol 6L6 ask for a quote.
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Yet retains the ability to use “tube roll” different valves, so the ST25 MK II is designed to use: 6L6, EL34, 6CA7, KT66, KT88, 6550. (Typical conditions EL34 valves@ 240v 50Hz. If you are new to valves the Stereo 25 MK II is an excellent starting point. ).
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Power source: AC ~ 220V / 110V. Power amplifier tube: EL34-B. 1×Single Ended Audio Amplifier. Input impedance: 100KΩ (stereo input). Rectifier tube: 5U4C. Input sensitivity: 600mV -2V. Electronics & Battery.
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Three 12AX7 preamp tubes and two EL34 power tubes for hard rockin' tone. Variable output knob goes from one to 45 watts. Three inputs for "channel jumping".
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