• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

DHT Headphone amp for HifiMan Edition XS

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Joined 2009
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Work in progress, R.C. regs. finished ready to combat!
 

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Felipe, the 30VA is the bottleneck.
If you use large first capacitor, the charging current will be large so, even multiple of DC load current.
If you choose just enough power (no headroom) for PT, it will be heating. Hot transformer efficiency will be degrading.
 
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18VAC 30VA isn't enough so I will use 18VAC with two secondaries of 60VA each, attached simulation with added 10R in series between 1st cap and CMC, it's fast & ripple it's 8mV, what do you think Bela?
 

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