Original TRIO JR-310 is a "stoic" ham band receiver. Nowadays not so many people on these band except 7MHz. Here I added two crystals and also modified coil pack wiring in order to add two (49mb: 5.9-6.2 MHz, and 31mb:9.4-9.9 MHz) broadcast frequency bands. Also I was not satisfied original AM demodulation sound and added "super wide" mode for more clear AM sound. A bit more details can be found at https://microwavemont.exblog.jp/30234...