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Audio and Video Talk
Valves / Vacuum Tubes
DIY EL84 integrated amp info, please?
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<blockquote data-quote="El Sid" data-source="post: 1004861" data-attributes="member: 18550"><p>OK so there is a choke in the power supply, and it does come before what are 2 x 220uF caps, so that's probably OK. It may be worth modelling in PSUD just to check that the peak current doesn't exceed the rectifier's specs on startup. That bridge rectifier isn't shown on the schematic - maybe a later mod to make it quieter?</p><p></p><p>Otherwise, without actually checking and calculating voltages, currents etc, it mostly looks fairly standard. One error in the schematic is the cathode resistor and cap on the input pentode being in series - that wouldn't work (unless I'm wrong somehow?). It must be different on the amp itself. Also the 1000uF is higher than it need be.</p></blockquote><p></p>
[QUOTE="El Sid, post: 1004861, member: 18550"] OK so there is a choke in the power supply, and it does come before what are 2 x 220uF caps, so that's probably OK. It may be worth modelling in PSUD just to check that the peak current doesn't exceed the rectifier's specs on startup. That bridge rectifier isn't shown on the schematic - maybe a later mod to make it quieter? Otherwise, without actually checking and calculating voltages, currents etc, it mostly looks fairly standard. One error in the schematic is the cathode resistor and cap on the input pentode being in series - that wouldn't work (unless I'm wrong somehow?). It must be different on the amp itself. Also the 1000uF is higher than it need be. [/QUOTE]
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Audio and Video Talk
Valves / Vacuum Tubes
DIY EL84 integrated amp info, please?
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