hi to all
i build tr sascho varna bulgharia .but this detector have Low deth detect.
i want ameliorate detect depth and booster (ampli) watt this detector
please help me please

best wish
i build tr sascho varna bulgharia .but this detector have Low deth detect.
i want ameliorate detect depth and booster (ampli) watt this detector
please help me please
best wish