New Projects
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Moving coil phono preamplifier
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Single-ended hybrid power amplifier
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Hybrid Phono Preamplifier MK I
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Balancing Cathode Follower RCA to XLR
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Laboratory Pages (preamps) (power amp)
Conceptual Ideas
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Le Pacific Preamplifier revisited
Some ideas, how this popular phono preamplifier might be improved in performance at very little costs
Older Projects
Components used in the older projects such as transformers, transistors or operational amplifiers may be obsolete
or outdated. The older projects are meant to provide information only.
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MM / MC battery powered Phono Preamplifier
This battery powered preamplifier was my very first DIY phono stage and was built in 2000. Drawback is the
limited operation time due to the small 9V batteries.
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MC phono preamplifier Il Trovatore
The Il Trovatore was built in 2013 and I replaced it in October 2019 by the above Memphis MC 1.
Today I see the combination of the MC step-up transformer with the two 2SK369 input jFets critical due
to their input capacitances. It is not a design I would recommend any longer.
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IC based power amplifier
This IC based power amplifier is a rugged all-purpose work horse, ideal for pop or rock music and discos -
not truly “high-end“ but 99.9% foolproof. I use it frequently since 2006 and it never failed.
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Tube Power Amplifier 2 x 50W
The tube power amplifier was built in 1994 and served me well until I replaced it by the above single-ended
power amplifier in 2017.
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super triode, vinyl, audio, analog, single ended, SE, power amplifier, hybrid, tube, KT66, 6SN7, ECC88, Mosfet, Lundahl, MC phono stage, preamplifier, MM, MC, moving coil, moving magnet, LL1693, LL1667, LL9226, LL1933, RIAA, folded
cascode, 2CS5200, MAT12, 2N3810, LL1660S, IXFN32N120P, balancing amplifier
