"Wireless monofon" with decent range

ft897WithDorjiUhf.jpg-this page is a stub

Here Dorji uhf-module is used as "wireless monofon". Technically hack is of course cross-band repeater, which allows to use handheld transceiver as monofon.

picture: Here Raspberry Pi 3 in battery box af Yaesu FT-897.
Dorji DRA818U module is on upper side of pic.

Potentiometer on backpanel is to adjust audio level coming from Yaesu,
and also have power switch for Dorji.
On USB connetors of Pi you can see soundcard and rtl-sdr receiver.
Black wire is going to modem dongle for internet connection.