Koifarm

Hello Hayk, thank you for your input. I have changed powersupply path to make it shorter. Will test it next batch of PCB’s The good...

It is all about what you like. I like also a bit of tube flavour. Some extra harmonics and other slew rate. The 6n6p or with ECC99...

Here my purifi build with tube inputbuffer. 2 channel purifi 1et400a with hypex smps700a400 and diy tubebuffer. HV smps tubebuffer...

The DC protection is a copy from Hypex UCD and Ncore class-D modules who use the same power supplies. This works for thousands of amps...

And a newer version T-rex 5c with XLR and rca input and DC protection. And even better thd (0.000045%). For Q1 you can also use OPA1656...

There is also a thrue hole version. More to read here : https://zelfbouwaudio.nl/forum/viewtopic.php?t=32175

You can buy it here : https://www.exicon.info/purchase.php or here: https://www.audiophonics.fr/en/search?search_query=Exicon

0.775Vrms

See pictures below. Spikes in graph are from my noisy room. Noise from my regulator, measurement limit of my equipment was -130db...

When using small signal preamps for microphone, mc/mm phono preamp or discrete preamp, a low noise power supply is a must. Walt Jung and...

C12 had no ground connection. This corrected. And C16/C17 were wrongly coded. All corrected in gerber below.

Update Trex 4b . As promised the files for the big version. Schematic Attached also gerber files for ordering the PCB. And in...