I have inherited an uninstalled new ham radio
transceiver with my yacht. It is a Yaesu FT-857D. It also came with a large antennae tuner. The Yacht is Aluminium so care needs to be taken with the grounding of the antennae (I believe you use capacitors to transmit the hf, but not the DC to ground) and there is no insulated backstay.
I plan to replace the standing rigging
later, fit an insulated backstay and get some professional advice about the grounding situation.
In the mean time I would like to use the transceiver as a receive only device with a temporary longwire antennae strung up the rigging
I have tried connecting a longwire to the central pin of 50 ohm coax but I don’t seem able to receive much.
I realize that with this set up without an antennae tuner if I tried to transmit the poor SWR would damage the transceiver but shouldn’t it work reasonably as a receiver only?
Do I need a balum between the 50 Ohm coax and the longwire?