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DIY For Audio
AIKIDO 24V with <=30V B+ (4XPHILIPS NOS ECC86 + LM317 follower with LM317ccs)
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<blockquote data-quote="gavinbirss" data-source="post: 38476" data-attributes="member: 60"><p>see <a href="http://www.tubecad.com/Product_PDFs/24V_Aikido_Stereo_Rev_A.pdf" target="_blank">http://www.tubecad.com/Product_PDFs/24V_Aikido_Stereo_Rev_A.pdf</a> - mine was Rev B</p><p></p><p>Unity-Gain Buffers This stage makes use of two solid-state, three-pin voltage</p><p>regulators per channel, which greatly simplifies the circuit?s construction, while</p><p>retaining the advantages inherent in the regulators, such as thermal and short-circuit</p><p>current limits. One way to view these regulators is as hot-rodded NPN power</p><p>transistors, with the added feature is being depletion-mode devices. In other words,</p><p>with an LM317 or LT1085 for example, the adjust pin can and must be more negative</p><p>that the output voltage. One regulator sits atop another, with the top regulator acting</p><p>as single-ended buffer/follower. The bottom regulator functions as a constant-current</p><p>source?and not a bad one at that.</p></blockquote><p></p>
[QUOTE="gavinbirss, post: 38476, member: 60"] see [url=http://www.tubecad.com/Product_PDFs/24V_Aikido_Stereo_Rev_A.pdf]http://www.tubecad.com/Product_PDFs/24V_Aikido_Stereo_Rev_A.pdf[/url] - mine was Rev B Unity-Gain Buffers This stage makes use of two solid-state, three-pin voltage regulators per channel, which greatly simplifies the circuit?s construction, while retaining the advantages inherent in the regulators, such as thermal and short-circuit current limits. One way to view these regulators is as hot-rodded NPN power transistors, with the added feature is being depletion-mode devices. In other words, with an LM317 or LT1085 for example, the adjust pin can and must be more negative that the output voltage. One regulator sits atop another, with the top regulator acting as single-ended buffer/follower. The bottom regulator functions as a constant-current source?and not a bad one at that. [/QUOTE]
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DIY & Tutorials
DIY For Audio
AIKIDO 24V with <=30V B+ (4XPHILIPS NOS ECC86 + LM317 follower with LM317ccs)
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