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B. Step Down Transformers
The number of step-down tranformers and the taps used will depend on the number of speakers and the distances
between the speakers as shown below.
1. Using Only One Speaker
If only one speaker is used, only one step-down transformer would be required.
Connect the speaker to the 8 OHM and COM taps of the step-down transformer's
secondary coil as shown. Connect the same wattage taps (as those used on the
step-up transformer's primary coil) of the step-down transformer's primary coil to
the end of the long wire run.
2. Using Two Speakers (close together)
In using two speakers located close together, connect the two speakers in paral-
lel and connect them to the 4 OHM and COM taps of the step-down tranformer's
secondary coil as shown. Connect the same wattage taps (as those used on the
step-up transformer's primary coil) of the step-down transformer's primary coil to
the end of the long wire run.
3. Multiple Speakers or Speakers Located Far Apart
Multiple speakers (three or more) or speakers located far apart will require multiple step-down transformers.
Connect each speaker to the 8 OHM and COM of each step-down transformer's secondary coil. To determine which
taps to use on each step-down transformer's primary coil, divide the wattage of the tap used on the step-up tran-
former's primary coil (2.5 for a PA-2A, 5 for a CPA-7B, 10 for a M15W) by the number of speakers and connect each
of the step-down transformer's primary coils to the end of each long wire run.
Example (shown below): A PA-2A driving four speakers located far apart from each other would equal 2.5 watts
divided by 4 which is 0.625 watts, so use the .625 WATT and COM taps on each step-down transformer's primary
coil.
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Due to the dynamic nature of the product design, the information contained in this document is subject to change without notice. Viking Electronics, and its affiliates and/or
subsidiaries assume no responsibility for errors and omissions contained in this information. Revisions of this document or new editions of it may be issued to incorporate
such changes.
Fax Back Doc 856
8 OHM
.625 WATT
COM
COM
Step-Down
Transformer
8 OHM
.625 WATT
COM
COM
Step-Down
Transformer
8 OHM
.625 WATT
COM
COM
Step-Down
Transformer
8 OHM
.625 WATT
COM
COM
Step-Down
Transformer
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6
8 OHM
2.5 WATT
COM
COM
Step-Down
Transformer
4 OHM
2.5 WATT
COM
COM
Step-Down
Transformer
Long Wire Run
Long Wire Run
Long Wire Run
2.5 WATT
Long Wire Run
.
8
6
6
6
.
8
6
6
6
Printed in the U.S.A.
VIKING
PAGING
VOLUME
MIN
WARBLE / CHIME
RINGING LINES
1 - 3
2.5 WATT
Long Wire Run
COM
Step-Up
Transformer
VIKING
PAGING
VOLUME
MIN
TALK BATTERY
WARBLE / CHIME
RINGING LINES
1 - 3
2.5 WATT
Long Wire Run
COM
Step-Up
Transformer
VIKING
MODEL PA-2A
©
PAGING
RINGING
VOLUME
VOLUME
VIKING
ELECTRONICS
HUDSON, WI 54016
MIN
MAX
MIN
MAX
PAGING - LOUD RINGING
AMPLIFIER SYSTEM
1 2 3 4
5 6
7 8
9 10
TALK BATTERY
POWER
JP1
ALERT TONE
WARBLE / CHIME
RINGING LINES
1 - 3
4 - 6
1 2 3 4
8 OHM
COM
COM
Step-Up
Transformer
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B
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MODEL PA-2A
©
RINGING
VOLUME
VIKING
ELECTRONICS
HUDSON, WI 54016
MAX
MIN
MAX
PAGING - LOUD RINGING
AMPLIFIER SYSTEM
1 2 3 4
5 6
7 8
9 10
TALK BATTERY
POWER
JP1
ALERT TONE
4 - 6
1 2 3 4
8 OHM
COM
MODEL PA-2A
©
RINGING
VOLUME
VIKING
ELECTRONICS
HUDSON, WI 54016
MAX
MIN
MAX
PAGING - LOUD RINGING
AMPLIFIER SYSTEM
1 2 3 4
5 6
7 8
9 10
POWER
JP1
ALERT TONE
4 - 6
1 2 3 4
8 OHM
COM
.
7
1
5
.
3
8
6
.
4
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