CONNECTIONS
For a home music system using separate control-preamplifier and power amplifier make the
following connections to the
Spacexpander;
• Control-preamp LEFT OUTPUT connected to
Spacexpander
A INPUT jack.
• Control-preamp RIGHT OUTPUT connected to
Spacexpander
B INPUT jack.
• Spacexpander
A OUTPUT connected to power amplifier LEFT INPUT jack.
• Spacexpander
B OUTPUT connected to power amplifier RIGHT INPUT jack
ADDING SPACEXPANDER JACKS
Jacks for
Spacexpander
interconnecting cables can be added to most home music systems -just
decide
where
to break into the signal path and
where
to mount the jacks (The signal paths in both
schematics
are
indicated by the heavy line.).
Actually it is not necessary to install jacks. Where space is limited the cables can be wired directly
into the circuit. Plugs on the
other
ends will go into the
Spacexpander
jacks. A feed
through
connector
can
be used to connect the two plugs together to take the place of the horse-shoe shaped
jumper used to com
plete the circuit with factory-installed
Spacexpander
lacks.
DO NOT wire the cables directly into the circuit without providing strain relief of
some
sort. Solder
terminals are not strong enough to withstand much pulling and repeated twisting of the cables
will break the conductors of the cable where they are soldered to the home music system circuitry.
Modern home music systems may be either vacuum tube or transistor types (or a combination of
both) and may use printed circuits as well as point-to-point wiring. Printed circuitry in the two
schematics in this section has been shaded. The transistor home music system uses much more
printed circuitry.
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