Next to the speaker is an Eico 723, which is a 60 watt DC input transmitter...about 50 watts output. The box next to the receiver is a TR switch so I didn't need to move switches around to start transmitting. It was described in the ARRL handbooks back then. Building that... I needed a LOT help from a marine master gunnery sargeant. The old bug is sitting on the old Tymeter "digital" clock. I still have everything except the TR switch.