December 9, 2018

PiCorePlayer, all-in-one

In my Network Player I now run PiCorePlayer with LMS, Squeezelite and Jivelite. Before I ran PiCorePlayer with LMS on my NAS and with no screen, but I rebuilt it because I wanted an all-in-one solution.
LM350 PSU for RaspBerry Pi 2B+ and for the USB 500 GB harddisk holding my FLAC files.
I didn't want the USB disk to be powered by RPi, hence I modified a USB Y-cable to avoid back powering (data only to Pi).
3.5" TFT screen from Joy-IT.
GPIO 26 switch for shutting down PiCorePlayer.
Same USB DAC as before.

Another Bride of Zen preamp

Goes well with the Amp Camp Amp. 
Alps Black 10K potentiometer at output.
Two line inputs, tape monitor, tape out, pre out.
My speakers are vintage Sansui SP-X8000.

May 31, 2018

KSL-M77 preamplifier

Here's a KSL-M77 which I built for a good friend.
Modified with external low noise LT1963A regulator board. MU-metal around transformer.
Hig resolution pictures here.
Many thanks to Stanton Tin from Jim's Audio for his stellar customer service.

March 19, 2018

Hiraga monoblocks

Restored and rebuilt these diy 30 watt class A monoblocks.
Added speaker protection. Replaced various components. Rewiring and resoldering.

March 11, 2018

February 23, 2018

LM3875 chipamp with X-10D tube buffer

Just finished this little amplifier.
Chipamp based on Peter Daniels LM3875 pcb and his minimized circuit. 

300VA transformer.
Speaker dc protection circuit, including 10 sec. delay and mute function.
Input selector > X-10D tube buffer > 25K potentiometer > LM3875 amplifier.

The two triodes in the X-10D clone are 6922.
Leather front. The little sticker says "FRIKLANG", which could be translated to "unlimited sound".

August 22, 2017

Class A monoblock amplifier

John Linsley-Hood 1969 circuit, 10 watt.
12V, 210 VA transformers. PCB from China. 
Two 2SD1047C power transistors.
Speaker protection board.
Plexiglass top and rear plates. Nice sound.