Imroved Soft Start + DC Blocker aka iSSDCB
in Power amplifiers, Power supplies
The original Soft Start + DC Blocker published on this website a few years ago required quite complex wiring encompassing both the mains supply to the transformer and wiring from the rectified and DC smoothed secondary. Additionally, the mains power switch had to be rated for the full primary AC load current which placed severe […]
Hifisonix Soft Start + DC Blocker for mains
in Power amplifiers, Power supplies
You can buy a DSTHP PCB for the Soft Start DC Blocker over in the Shop. Large (300 VA and above) Toroidal transformers suffer from high in-rush currents if they happen to have mains applied when the AC voltage cycle passes through zero volts. On a 1 kVA transformer, this can exceed 100A. Added […]
Hifisonix Micro Ripple Eater
in Power amplifiers, Power supplies
You can buy Micro Ripple Eater boards in the Shop This simple ripple eater (aka MRE) can deliver up to 10A per supply rail (provided it is suitably heatsinked!) and will reduce mains related ripple on amplifier supply rails by up to 40 dB and as much as 50 dB at HF. The board is […]
Hifisonix Standard PSU
in Power supplies, Preamplifiers
You can buy a PCB for this power supply over in the Shop. If you are building a headphone amplifier, you can also buy a Standard PSU + HPA-1 Class A Headphone Amplifier PCB bundle in the Shop. Here is a low noise general purpose linear power supply that can be used to power the […]
Hifisonix Ripple Eater PSU for the sx and kx-Amplifiers
in Power amplifiers, Power supplies
The PCB’s are through hole plated and silk screened for just $11.99 (excl. shipping) and are available from Jim’s Audio here: Ripple Eater PSU for kx and sx Amplifiers (please note these PCB’s are not available from the Hifisonix Shop) Here is an Excel file with the BOM: Ripple Eater PSU BOM The BOM is […]