shorting bar การใช้

• Then the distance from the end of the link to the shorting bar is a half-wavelength.
• A simpler design is a " U "-shaped metal bar, marked with graduations, with a sliding shorting bar.
• The shorting bar hook, attached to the cam, shears the shorting bar ( a safety device across the detonator ).
• The shorting bar hook, attached to the cam, shears the shorting bar ( a safety device across the detonator ).
• The shorting bar is slid down the line and the position of two successive current minima is noted, the distance between them is half a wavelength.
• A camming action breaks the shorting bar and forces the battery ball against the battery breaking the glass ampule containing an electrolyte which activates the reserve battery and provides power.
• The shorting bar should always be slid " out ", away from the link end, not " in ", to avoid converging on a higher order node by mistake.
• The other method used to find the nodes is to slide the terminating shorting bar up and down the line, and measure the current flowing into the line with an RF ammeter in the feeder line.
• Lecher line wavemeters are usually built on a frame which holds the conductors rigid and horizontal, with a track that the shorting bar or indicator rides on, and a built-in measuring scale so the distance between nodes can be read out.
• In operation, the U end acts as a coupling link and is held near the transmitter's tank coil, and the shorting bar is slid out along the arms until the transmitter's plate current dips, indicating the first node has been reached.
• Underneath was a small worksurface about 2'x1', a swivel-chair screwed to the floor, and variously a short ladder for evacuating coaches, sometimes a medical cabinet, and a rail-shorting bar would be fixed to the side of the compartment.