Ramsey Electronics BS1 Manuel d'instructions télécharger pdf (Page 10)

SG7• 10

 6. Use needle-nose pliers to close both strain-relief clamps, but be sure

you don't crush through the wire insulation!

 7. Install both plug shells and check all connections with a VOM or

continuity tester before using the cable

MORE SG7 CABLE OPTIONS:

The cable kit supplied with your SG7 will handle the majority of typical

applications. However, "non-typical" applications can be even more fun and

useful. So, we're pleased to clue you in on the fact that this cable can be as

long as 300 feet, if that gives you more interesting "remote" speed-

monitoring ideas. One ready-made cable and plug assembly (6-ft length) is

Radio Shack No. 42-2157. A 50-ft. cable can be made for well under ten

dollars from RS 278-1276 (Cable) and RS 274-284 (package of two plugs).

THE DC POWER SUPPLY:

This is supposed to be the easy part that we all take for granted, but it is a

good idea to work out your power supply in advance and wire it to the power

plug supplied with your kit, so as not to become all wrapped up in haywire or

trying to use weak batteries when the moment comes to field-test your SG7.

Assuming that you will be using the SG7 as a portable instrument, you'll

want some style of battery power supply to permit convenient and practical

operation. For optimum range and sensitivity, the unit requires an honest

12-14 volts, drawing a steady 150mA with earphone output, and 115mA

without such audio output. Suggested voltage sources include:

•

Automobile lighter/accessory cord

•

8 (or 9) Alkaline "D" Cells (best) or "C" Cells.

•

Two 6-volt or one 12-volt lantern battery

•

Various commercial or surplus 12-volt NiCad packs (such as for

video cameras, two-way equipment, cellular telephones)

For light, occasional use, fresh "AA" alkaline batteries offer a very compact

source of DC power. While rated for 200mA, such batteries really are not

adequate for prolonged operation, as the voltage will begin to drop after ten

minutes or so.

Note on AA,C and D cells: While we generally assume that 8 of these

batteries can provide 12 volts, the truth is usually closer to 11 volts. An extra

cell of the same size and type in series with your multiple-cell battery

holders will assure optimum performance of the SG7 or other devices

designed for 12 volts. Radio Shack carries a line of inexpensive battery

holders in a variety of configurations.

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Ramsey Electronics BS1 Manuel d'instructions Page 10