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DIY For Audio
Diagnosing power supply of SRPP
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<blockquote data-quote="d0dja" data-source="post: 1084182" data-attributes="member: 2244"><p>So progress, replaced the transistors on the voltage reference and that solved the PSU stability. Now goes straight to 146v and stays there. The zeners must be 15vx10 not 25v. Very hard to read markings...</p><p></p><p>Top of output swing still squished though. Happens at any input voltage. </p><p></p><p>Maybe it's an SRPP thing! </p><p></p><p>Makes it sound warmer... </p><p></p><p>I'll have a crack at measuring voltages on the tubes this eve...</p></blockquote><p></p>
[QUOTE="d0dja, post: 1084182, member: 2244"] So progress, replaced the transistors on the voltage reference and that solved the PSU stability. Now goes straight to 146v and stays there. The zeners must be 15vx10 not 25v. Very hard to read markings... Top of output swing still squished though. Happens at any input voltage. Maybe it's an SRPP thing! Makes it sound warmer... I'll have a crack at measuring voltages on the tubes this eve... [/QUOTE]
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DIY & Tutorials
DIY For Audio
Diagnosing power supply of SRPP
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