X-Altra Mini II ‘Classic’: High-End Preamplifier Manual Control Preamplifier

This PCB set is to build a full X-Altra Mini II ‘Classic’ which is the manual control version of the preamp – JFET discrete line amp unbalanced output,  aux unbalanced output, 2 left and right balanced outputs  plus a buffered record output; inputs are  phono (MC and MM), CD, Tuner, Aux, DAC and Rec; Very […]

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X-Altra Mini II ‘Classic’ to Full Remote Control Upgrade PCB

Upgrade  the manual control X-Altra Mini II to full Remote Control.  The Remote Control PCB replaces the Input Select control PCB and comes with an NXP LPC1114 microcontroller pre-programmed and mounted on the board. You must purchase an Apple TV Remote (aluminium silver type) from your local apple store – the cost is about $20.  […]

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X-Altra Mini II Remote Control Board Only PCB

Use this option if you are only purchasing the Remote control board and no others.  PCB comes with NXP LPC1114 mounted and programmed. Do not use cheap plastic imitation Apple TV Remotes from Amazon or Ali Express – you will run into problems.   Attention: you must use the Remote control housing with this board, available […]

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HifiSonix Standard PSU PCB

This PSU features +-18V rails, <100 uV wideband noise at full load along with a muting control circuit for  any muting function required by the end user.  Additionally, a +12V 40mA relay supply is provided and +5V/+3.3V at 60mA.  The board uses a low noise 15 or 25VA PCB mount Nuova Talema transformer.

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Hifisonix High Performance Balanced Line Stage PCB

This line stage employs OPA1641 and OPA1642 opamps to provide a left + right balanced output plus two unbalanced outputs per channel.  All outputs are equipped with relay muting (the mute control can come off either the Hifisonix Standard PSU or the X-Altra Mini II Remote Control Board).  For specifications, BOM and write-up, see the […]

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Hifisonix High Performance Discrete Line Amplifier PCB

Stereo Discrete Line Amplifier PCB featuring low noise JFET input, all class A output stage, ultra low distortion. PCB measures 85 mm x 72 mm.  This board uses SMD components down to 0805 and will accept the standard 8 pin SOIC SMD package or the TO-71 6 leg metal can.

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