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DIY For Audio
What do you call a stereo version of the Mullard 3-3?
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<blockquote data-quote="kubusi" data-source="post: 744589" data-attributes="member: 19010"><p>Lovely little amplifier, built a few if them over the years, the first time I came across the circuit when it appeared in Radio Constructor in about 1956 or thereabouts. Another almost identical circuit was published at a later date by Pope (another name of Philips) the only difference was it also included a bass control in the feedback circuit and a top cut control after the input volume control. All the other component values were identical to the original "Mullard" circuit. </p><p>To go back even further an almost identical circuit exists from the late 1940's using the 8 pin rimlock series of valves making use of the EF40 and EL41 which are virtually identical to the later EF86 and EL84 which would appear to have developed from the prior 40 series of valves. Cannot remember what rectifier was used but I would think it would have been the EZ40 which is very similar to the later EZ80.</p><p>Would be an interesting exercise to build up a stereo version using the earlier rimlock series of valves.</p><p>Finally what have you changed from the original Mullard version?</p></blockquote><p></p>
[QUOTE="kubusi, post: 744589, member: 19010"] Lovely little amplifier, built a few if them over the years, the first time I came across the circuit when it appeared in Radio Constructor in about 1956 or thereabouts. Another almost identical circuit was published at a later date by Pope (another name of Philips) the only difference was it also included a bass control in the feedback circuit and a top cut control after the input volume control. All the other component values were identical to the original "Mullard" circuit. To go back even further an almost identical circuit exists from the late 1940's using the 8 pin rimlock series of valves making use of the EF40 and EL41 which are virtually identical to the later EF86 and EL84 which would appear to have developed from the prior 40 series of valves. Cannot remember what rectifier was used but I would think it would have been the EZ40 which is very similar to the later EZ80. Would be an interesting exercise to build up a stereo version using the earlier rimlock series of valves. Finally what have you changed from the original Mullard version? [/QUOTE]
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DIY & Tutorials
DIY For Audio
What do you call a stereo version of the Mullard 3-3?
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