Here are the main characteristics of the SID receiver:

• single-channel receiver, tested from 15kHz to 80kHz
• included antenna preamplifier
• active order 4 bandpass filter (bandwidth of less than 200Hz for stations below 30kHz)
• measurement of the RMS amplitude
• linear output (not dB), offset setting
• 12-bits ADC
• USB interface
• power supply included

A small quantity of high quality printed circuits boards for the SID receiver have been manufactured.
The author offers those boards for 30 euros plus shipping costs.
Please contact me for availability.

The printed circuit board is out of stock. Production of another batch is not planned.

Here is a picture of the board: