Pass Zen style class-A amp
Mar 25, 2016 at 8:12 PM Thread Starter Post #1 of 2

milosz

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Built this amp using http://electronics-diy.com/zen-headphone-amplifier.php
 
Uses 1,000 uF motor run film caps for output coupling (switchable with 1,000 uF Elna Silmic II electrolytic cap for comparison), SIlmic II caps in circuit, IXYS FRED diode bridges, separate transformers / diodes / filters for left and right channels, Alps blue velvet pot, solid metal Switchcraft 1/4" jack, silver / teflon wiring, etc etc.
 
Signal path consists of essentially only ONE active device, with active current source.
 
Custom knob is made of labradorite, which shows iridescence at certain angles; wood sides are Shedua.  1/2" milled aluminum front panel, generous heatsinks for running at 300 mA bias.  Heatsink max temp is 125° F
 
 

 

 

 

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