The Alpha Communications® PK543 Power Pack Am-
plifier is a self-contained unit not requiring an external
amplifier. The PK543 is designed for use with 3, 4 or 5
wire apartment speaker type stations and provides ampli-
fication, control and power circuits needed to operate a
complete apartment intercom system. Voice volume con-
trol and tone volume control are easily adjustable through
the screwdriver slot on the front panel. Additional func-
tions include multiple entrance operation selectable by
terminal connection with selectable delayed action door
release set at the DIP switch, post office door lock release,
and a tone signal to call remote stations. A steady or
warble tone can be used to identify calling from the main
entrance panel and/or the call button located at the suite
entrance. PK543 is listed with UL®, cUL® and is ap-
proved by CSA.
Height: 5.50" (140mm)
Width: 3.125" (83mm)
Rugged ABS White Plastic Casing.
Integrated circuit amplifier including
amplifier with frequency response ad-
justed for ideal voice quality.
Integrated circuit oscillator
Door Release: AC or DC operation with selectable
timing. P.O. door lock release.
• Voice volume
• Tone volume
• Programming switches:
1 Door Delay
2 Short Door Time
3 Entrance Tone
4 not used
Polarized plug in type wiring harness
Surface mount or mountable to the rear
of specifically designed apartment en
trance speaker panels.
Rev. 2 - 01/04
PK543 Intercom Amplifier
(shown without wiring harness)
ARCHITECTS' AND ENGINEERS'
The intercom amplifier shall be Alpha Communications®/
Tektone® model PK543 or approved equal and shall provide
amplification, control and power circuits needed to operate the
entire intercom system. The amplifier shall feature integrated
circuit amplification, integrated