M...,

My assumtions were that he said he was getting ready for a Table Top
Receiver; and that it would have both a LO-Z 50 Ohm {SO-239 Jack}
and HI-Z 500 Ohm {Pair of Terminals} as the External Antenna Inputs.

But in re-reading the original post; I see that it is a RadioShack
DX-394 which only has the one SO-239 Jack as it's External
Antenna Input.

My general preference with a Ceiling Loop Antenna is to use 300 Ohm
Twin Lead as the Feed-in-Line from the Wire Loop Element to the
Receiver's HI-Z 500 Ohm {Pair of Terminals} for the External Antenna
Input. The exception being if the Radio uses an 1/8" Mono-Jack as
the External Antenna Input. Then a short piece of simple Audio Coax
Cable with an 1/8" Mono-Plug can be the better choice for a
Feed-in-Line from the Loop Antenna to the Radio.

Note - Horizontal Wire Loop Antenna Element directly connected to a
Vertical Feed-in-Line.

iane ~ RHF