I have bought the two devices in the image. The 100MHz Upconverter with a SMA connector is used to upconvert HF/MF signal for RTL-SDR to demodulate. I found that there is signal from the antenna (tested by using another radio), but I can detect no signal when connecting to upconverter. I think I have connected them wrongly. May you advice the way of connection?
The model of Antenna Loop is Degen 31MS. The up convertor information is located at https://code.google.com/p/opendous/wiki/Upconverter Mine is using 100MHz v1.0 version.
My method to connect is to try to use a small wire to connect the "hole" of SMA connector with the audio plug. I have tried to contact with different part of that audio plug, still no luck.