Using the aliases Edward Green (Gimpel) and William Caldwell (Colepaugh), they rented a studio apartment on the top floor of a building at 39 Beekman Place, selected for its lack of steel frame construction that might interfere with radio signals. They set about procuring parts for the radio transmitter Gimpel was expected to build. A bulky magnifier unit was supplied to them by Berlin to read the microdots containing radio plans, however they left it behind when disembarking the submarine because of its excessive weight. They bought a magnifying glass, but found it was insufficiently powerful to read the dots. Gimpel obtained a 1944 edition ARRL Radio Amateurs Handbook containing transmitter plans, as well as a multimeter, several milliamp meters, a roll of copper bell wire, and some small hand tools. They purchased a used General Electric broadcast radio receiver which Gimpel intended to convert to an 80 watt shortwave radio transmitter by modifying it with additional electronic components, however there is no evidence this was ever accomplished.