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Audio and Video Talk
Valves / Vacuum Tubes
Interesting article on the history of the "Williamson" circuit
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<blockquote data-quote="Ampdog" data-source="post: 934389" data-attributes="member: 144"><p>Just about to retire to bed, when the name Williamson caught my weary eye.</p><p></p><p>Permit me to say I glanced through it with some emotion and a flood of memory. The original 'blue book' containing the first articles from "Wireless World" was my first book on the subject of hi-fi. I have since lost it (more's the pity) but have a photo-copy given by a friend. (If anybody still has a 'blue book', cherish it - it is history, if anything hi-fi related ever was, is, or will be ....)</p><p></p><p>I will refrain from comment for now . . . others will follow soon enough - </p><p> just to say (did I overlook it?)</p><p> If I am not mistaken, to me the milestone of the Williamson <em>was its first use of</em></p><p><em> global NFB, including the whole of the amplifier plus output transformer.</em></p><p></p><p>As expected quite a number of different (some barely) versions soon resulted, each with its claim to fame . . . .</p><p></p><p>but for many (dare I say most?) folks from the era as well as ever after, this will forever remain as an utterly worthy and undisputed beacon of the beginning of an era.</p><p></p><p>This should be compulsory reading for anybody before entering this complex and multi-faceted hobby - your ticket to the concert hall in a manner of speaking.</p><p></p><p>Thanks Fredeb</p></blockquote><p></p>
[QUOTE="Ampdog, post: 934389, member: 144"] Just about to retire to bed, when the name Williamson caught my weary eye. Permit me to say I glanced through it with some emotion and a flood of memory. The original 'blue book' containing the first articles from "Wireless World" was my first book on the subject of hi-fi. I have since lost it (more's the pity) but have a photo-copy given by a friend. (If anybody still has a 'blue book', cherish it - it is history, if anything hi-fi related ever was, is, or will be ....) I will refrain from comment for now . . . others will follow soon enough - just to say (did I overlook it?) If I am not mistaken, to me the milestone of the Williamson [i]was its first use of global NFB, including the whole of the amplifier plus output transformer.[/i] As expected quite a number of different (some barely) versions soon resulted, each with its claim to fame . . . . but for many (dare I say most?) folks from the era as well as ever after, this will forever remain as an utterly worthy and undisputed beacon of the beginning of an era. This should be compulsory reading for anybody before entering this complex and multi-faceted hobby - your ticket to the concert hall in a manner of speaking. Thanks Fredeb [/QUOTE]
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Audio and Video Talk
Valves / Vacuum Tubes
Interesting article on the history of the "Williamson" circuit
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