Saturday, January 21, 2017



After my last post on the Raspberry Pi3 and the extensive rework and/or replacement of the power supplies on the associated HiFi Berry DAC + Pro, a number of people have asked me: If I didn't want to deal with the additional power supplies, what would you do to improve the sound?

Well, here's the answer:

1.) Install a white-wire fix to feed the digital section of the PCM5122A and the clocks off the on-board regulator;
2.) Replace the LPF capacitors on the output of the PCM5122A with PPS capacitors;
3.) Add WBT Nexgen Cu RCA jacks;
4.) Feed 5VDC into through the GPIO header; and,
5.) Use the iFi iPower.

The results from doing this list of modifications completely transforms Raspberry Pi3, HiFi Berry DAC + Pro combination without resorting to the complexity of the additional power supplies.  To date, I've done a total of 6 of these for family and friends and they have been very well received.


Sunday, January 8, 2017



I've been experimenting a good bit lately with the Raspberry Pi3 and the HiFi Berry DAC + Pro.  Here's a link detailing some of what I've done on diyAudio: http://www.diyaudio.com/forums/digital-line-level/285811-hifiberry-dac-pro-hw-mods-anybody-50.html#post4940489

The sound quality can be quite good and I enjoy the ability to stream radio stations from far away.  Enjoy!

Wednesday, December 14, 2016

Sunday, December 4, 2016

Here's a Darling 1626 single-ended stereo amp with volume control that I built to get into the holiday spirit...yours for $500.






Wednesday, September 7, 2016

Here's a prototype amplifier that I built as test bed.  It uses compactron tubes, the signal section being patterned off of Thomas Mayer's 6GE5 amplifier.





Wednesday, August 3, 2016

Ultra Fi Basic Data Only USB Cable

Here's a data only (D+, D-, and GND)(No Vbus) custom USB cable. It is one meter in length. The fellow that ordered it never followed through. So, if your USB DAC doesn't need Vbus and you want to eliminate the nasty noise associated with running computer power through your USB cable then, this is the cable for you. I charge $350 for this cable on a custom order basis only normally but since the buyer never showed up - it is yours for $125 including shipping on the CONUS.


Tuesday, July 26, 2016

Chadd's been at it again.  Now he's using a pair of SuperWhamodynes with slot loaded open baffle woofers for his second TV setup.