While struggling with the first setup, Henry Bervenmark, loaned us a receiver that he had built himself. He designed it explicitly for APT reception and with his guidance we quickly obtained a nice image :

Image obtained with System 2 .

Our second setup

The second setup was basically the same as the first but switched Henry's receiver with the Icom. The frequency selection was done on the box rather than from the computer. This setup was used only at the institute with the antenna on the roof.

This receiver was optimally built for APT reception and we got our first really nice image with it. (The System 1 images actually came after the one above.)