Dynaco PAT 5 Owners Manual

Page 4

E.P.L Out / E.P.L In and ELL. Switch

This output/input combination is designed for use with
a separate speaker or octave equalizer such as the Dynaco
Equalizer. This pair of connectors is located before the
volume and balance controls, in parallel with the tape out.-
puts and inputs, and is controlled by the can switch
(External Processor loop) on the front panel. Connect
from E.P.L. Out to the input of the separate equalizer, and
from the output of the equalizer to E.P.L. In. When the
am. switch is pushed on. the equalizer is connected in the
circuit. When this switch is out, the equalizer is by-passed
(as if it were not connected at all), even though plugged
into the PAT-5. Therefore, if an external equalizer is used,
the 53.1.. switch must always be pushed on. If these con-
nections are not used, the 2.11.1. switch must remain out or
there will be no output from the PAT-5.

This pair of outputs and inputs may be used for connec-
tion of an active 4-channel matrix decoder. E.P.L. Out
is connected to the input of the decoder, the front channel
output of the decoder is connected to E.P.L. In, and the
rear channel output of the decoder is connected as directed
in the decoder's instructions to another control amplifier or
basic amplifier.

It is also possible to use these connections as a channel
reverse switch To do this, connect a short shielded audio
cable from the left EPL. Out to the right E.P.L. In, and
a second audio cable from the right EPL. Out to the left
E.P.L. In. When thus connected, pushing on the 3.9.1..
switch will reverse Output 1 and Output 2 channels of the
PAT-5 (Tape Out 1 and Tape Out 2 are unaffected).

It is possible to rewire the E.I.L. Out and E.P.L. In con-
nections at another circuit location. if needed. See the
arm OPTIONAL uonmcarron section on page 29.

Output 1 / Output 2

Connect Output 1 via the shielded audio cables supplied
to the audio input of the power amplifier. Output 2 may be
used to connect a second amplifier, if desired, or to a tape
deck if the full facilities of the PAT-5 are needed for re-
cording purposee. Otherwise, Output 2 remains uncon-
nected.

There are no electrical differenwe between Output 1 and
Output 2. They are connected in parallel. Both provide
low impedance, unbalanced signal output. If longer shielded
cables are required, any length up to 50 feet may be used.

If you wish to alter tonal balance for recording onto a
tape deck, all the controls on the PAT-5 can be used if
Output 1 or Output 2 is used. The voumr: control will
then change not only the speaker and/or headphone level,
but also the signal level going onto the tape deck. The
filters, stereo-mono switches, tone controls and even a sep-
arate equalizer (through can.) may be helpful when trans-
fering older discs to tape, for example. A higher signal
level can also be obtained from these outputs, but it will be
necessary to advance the venom: control somewhat, which
may provide too much signal for simultaneous listening
aver speakers or headphones. You may therefore wish to
turn of! the power amplifier once the proper tonal correc-
tion has been achieved.

4

AMPLIFIER AND SPEAKER/
HEADPHONE CONNECTIONS

Six pairs of terminals are supplied on the PAT-5 to en-
able front panel selection of two sets of speakers and oper-
ation of headphones. These terminals are 3-way binding
posts, which will accept single banana plugs, professional
double banana plugs with % spacing, spade lugs, or
simply stranded wire. The hot binding posts are red; the
ground" or common posts are black. Six red and 6 black
single banana plugs are supplied to aid in this connection.

The black binding posts are all tied together. They are
not connected to the chassis to avoid the possibility of burn
loops. All Dynaco tube and solid state amplifiers have
their output common terminals connected together, and
therefore they may be connected to the PAT-5. (There are
a very few amplifiers which cannot have their common ter-
minals thus connected. The outputs of such amplifiers
cannot be connected to the PAT-5 for speaker selection or
headphone use. If in doubt, contact the maker of the
amplifier.) Lamp cord (zip cord), #18 or #16 gauge,
available from hardware and electrical supply stores, is suit-
able for this hookup. Proper phase sense is easily main-
tained with lamp card, because one conductor is coded with
a molded ridge on the outer insulation.

If only one stereo pair of speakers is planned, and head-
phones are not used, these connections need not be made.
Instead, hookup may be made directly from the amplifier

to the speakers.

left Amplifier I Right Amplifier

Attach a red banana plug to the one conductor of lamp
cqrd coded with a molded ridge, and attach a black banana
plug to the other conductor next to it. Connect the red
plug to the red Left Amplifier binding post on the PAT-5,
and the black plug to the black Left Amplifier binding post.
Connect the coded conductor at the other end to the left
hot" output on the amplifier (coded red on all Dynaco
solid state amplifiers), and the remaining free conductor to
the left common or ground output on the amplifier.

In a similar manner. connect the red and black Right
Amplifier binding posts on the PAT-5 to the hot" and
common outputs on the right channel of the amplifier.

Once this connection is made, the circuit is complete for
front panel use of headphones.

A-l I A-lt I B-l / 84! Speakers

Connection from these binding posts on the PAT-5 via
the remaining banana plugs and lamp cord will enable
front panel selection of speakers A" or B", or "A + B
simultaneously. Usually speakers A" are the most com~
manly used stereo pair and B" the least used, although
electrically it makes no difi'erence.

Connect the red and black binding posts marked 11-1. to
the left A" speaker. Be sure to maintain similar wiring
sense for each speaker, so that all speakers will be con-
nected in phase. Normally the black common PAT-5 bind-
ing post is connected to the (-), common or ground
terminal on each speaker, and the red "hot binding post
to the other speaker terminal. As mentioned before, proper
phasing sense is easily attained with lamp cord because
one conductor has a molded ridge on the insulation.