Prototype Photos

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This is a 40 turn loop that presents a strong signal without amplification. The distortion that accompanies amplification as an amplifier strains to supply the substantial current needed by a single-turn loop is eliminated by multi-turn designs of this type. It is very light and the loop itself could be described as a light "gooseneck" loop with memory that you can easily form to the shape you prefer.

The smooth nylon cover is a spiral with rounded edges so air can flow between it and you. I find it quite comfortable and configurable but others may prefer a full plastic jacket.

This unit is fully passive (no batteries) and is quite sensitive for low level signals. It is shown operating with a small cordless phone that happens to have much lower audio output level than our cell phones. My wife's cell phone's volume has to be set at mid volume when this loop is used with my 211 dSZ Savias.

The connecting cable is a 3.5mm stereo type plug on one end and 2.5mm stereo on the other. It is wired to properly connect the loop to the earphone signal and the loop's electret microphone to the cordless or cell phone's conventional input contacts contained in its 2.5mm jack.

The loop's housing supports a good cardiod unidirectional microphone made by Labtec. The mic's directional pattern results in a surprisingly good "close-talking" sound to the outgoing voice.