@joerg_rw Do you think that the pcb layout could be designed with a little space dedicated to optionally solder an rtl2832 and an e4000? Usually, this would require a very little space and would allow to have onboard a dvb-t tuner and an sdr receiver. Look here for an example of pcb with these ic: http://www.radioelementi.it/public/dtb_sdr.jpg Eventual rtl2832-gr IC availability: http://www.oemstrade.com/search/RTL2832-GR/