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DIY & Tutorials
DIY For Audio
Leslie Model 125 mono valve amp (ex organ)
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<blockquote data-quote="handsome" data-source="post: 1058770" data-attributes="member: 772"><p>You definite;y need to connect the "-" end of the bridge rectifier to circuit earth.</p><p>Twist very tightly all your heater wiring and try keep it away from all other wiring.</p><p>Get a piece of 2.5mm bare copper mains wiring and run it in a line across your amplifier from the input to the power supply. Connect each section's (2x6L6s are one section, 12A*7 is another section) earth to <em>one point</em> on that wire. Run it so you have mains transformer/rectifier/1st capacitor&resistor -- 2x6L6s, their resistors & capacitors -- 12A*7 with associated resistors & capacitors & the volume control. You want to keep the big currents away from the small currents. BIggest current is at the beginning of the power supply, smallest current sis by the 12A*7 tube.</p><p>Try keep connections as short as possible - connect resistors directly to valves pins if you can.</p><p></p><p>You don't need the "load" resistor get rid of it - if you're planning on using a 12AX7 then use the substitute values i gave you.</p></blockquote><p></p>
[QUOTE="handsome, post: 1058770, member: 772"] You definite;y need to connect the "-" end of the bridge rectifier to circuit earth. Twist very tightly all your heater wiring and try keep it away from all other wiring. Get a piece of 2.5mm bare copper mains wiring and run it in a line across your amplifier from the input to the power supply. Connect each section's (2x6L6s are one section, 12A*7 is another section) earth to [i]one point[/i] on that wire. Run it so you have mains transformer/rectifier/1st capacitor&resistor -- 2x6L6s, their resistors & capacitors -- 12A*7 with associated resistors & capacitors & the volume control. You want to keep the big currents away from the small currents. BIggest current is at the beginning of the power supply, smallest current sis by the 12A*7 tube. Try keep connections as short as possible - connect resistors directly to valves pins if you can. You don't need the "load" resistor get rid of it - if you're planning on using a 12AX7 then use the substitute values i gave you. [/QUOTE]
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DIY & Tutorials
DIY For Audio
Leslie Model 125 mono valve amp (ex organ)
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