◆ SpookStack

Memorendum to Mr. Rosen ; input selector switch or short cirenit inside the amplifier because when the input selector switch wes turned on to the "play back" position the amplifier _, @llowed the reproduced recorded sound to feed back on the telephone line. ACTION TO BE TAKEN hnical Laboratory is presently conducting a test pre which was in use at las Vegas, Nevada, which “e . © hear a play-back of their own conversation. way poe — ae)