MK1 hiFace USB to BNC 24/192 Computer Interface  $260 shipped
(75Ohm BNC) M2tech hiFace moded by John Kenny w/PSU, RF attenuator



John Kenny https://sites.google.com/site/hifacemods/ modded M2Tech hiFace (75 Ohm BNC) with the John Kenny recommended PSU and 10dB (75 Ohm BNC) RF attenuator, BNC adaptor to RCA too.

Selling only because want some money for other hobby projects.

MK1 FAQ

MK1 Modifications:
What modifications are done?
The 3.3V power supply to the on-board clocks is  separated, isolated &  then supplied from an external battery. By doing this the power to the clocks is very low noise.. The on-board 3.3V regulator is removed & this power is now supplied from another external 3.3V battery. This powers the clock handling output stages of the CPLD chip.

Is the modified Hiface now separate from the computer's power supply?
No, the 5V from the computer is still used by the Hiface to power the SPDIF generating chip. The 5V is also as the input to an on-board 1.8V regulator. The 1.8V powers the CPLD also. The 5V power form the computer is fed through the USB cable.

Is there no longer a need for the 5V power over USB?
Yes, there is still a need for this USB 5V supply as it is used to power the less critical areas of the device.

Sold