Caple C871i Bedienungsanleitung PDF herunterladen (Seite 50)

Apple II Computer Info

performance when used with the Apple II. Note these features:

(a) Heavy-duty stranded wire (AWG-18): This is the heaviest grade of wire

that will fit on the Molex and AMP connectors. Most wires are

American-made.

(b) Heavy-duty insulation: Wires are wrapped with color-coded 600v heavy

duty insulation. (Standard insulation is rated merely at 300v.)

Heavy-duty

insulation gives maximum protection against inter-wire shortages within

the

6-conductor cable; it also minimizes the risk of damage by wire-chewing

puppies or infants who may be nearby on the floor near the computer desk.

covered securely to eliminate shorts: First, the soldered connection is

painted with an insulating paint; next, two layers of polyolefin

shrink-tubing are added to insulate and strengthen the joint.

High-current

lines (+12v, +5v) are connected to multiple wires coming from the power

supply. Unused wires are trimmed, insulated, and tucked in bundles. The

entire six-wire cable is secured together with sections of 1/2"

shrink-tubing

and nylon ties.

(d) A Molex-4 connector left intact: The IBM power supply has two

connectors (P8, P9) that transfer power to the motherboard, plus 3-5

Molex-4

female connectors that empower the disk drives. A Molex-4 female

connector

has been left intact; extras have been removed. The Molex-4 crimp pins

deliver these high amperage voltages: (+12, neg, neg, +5v). The Molex-4

is useful for several reasons: (a) It can be used for testing a hard

drive,

which receives power via the Molex-4; (b) the +12v and +5v lines, the

most

important outputs, can be monitored with a DC voltmeter from the Molex-4,

and (c) other appliances such as indicator

lights or a hard drive can be attached to the Molex-4 connector.

(e) The finest crimp-pins ("Trifurcon," from Digi-Key) have been used in

power supplies shipped since July 1996. Previously, "Jameco generic"

crimp-pins were used. Trifurcon crimp-pins are superior because they

surround the male pin on three sides, giving better electrical contact.

This enables the transfer of maximum amperage from the power supply to

the motherboard.

(f) Note that the 6 ft grounded 120v ac power cord is NOT INCLUDED with

the power supply. The standard Apple II power cable works perfectly with

IBM-style power supplies.

(g) A female Molex-4 connector is left intact on each power supply, mainly

as a site for voltage testing. But this connector can be used as a

stabilized source of DC voltage (either +5v dc or +12v dc) for small

appliances such as cassette players, radios, pencil sharpeners, etc. Most

items that use 6v dc will work with 5v dc supplied by this power supply.

I use a pencil sharpener at a Molex-4 plug, and its use creates no

interference whatsoever with the computer. For $3 plus shipping, I can

make a plug-in cable with male Molex-4 plug, 6 ft cable, and 2.1mm barrel

Apple II Computer Technical Information : Apple II Family Hardware Info

ftp://ground.ecn.uiowa.edu/2/apple2/miscinfo/hardware : May 2001 : 50 of 572

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