PK543A (PK543) Tektone PK543A Apartment Intercom Amplifier is a self-
contained unit that does not require an external amplifier. The PK543A is designed for use with 3-, 4- or 5-wire apartment remote stations and provides amplification, control and power circuits needed to operate a complete apartment intercom system. Voice volume control and tone volume control are easily adjustable through the screwdriver opening on the front panel. Additional functions include multiple door entrance operation with the PK502B; AC, DC or Maglock configurations with three selectable delayed door timing modes; post office door lock release; steady or warble call tones; power LED; selectable door button hold timeout; and selectable talk before door interlock (available for 4 -wire stations only).
The PK205 Intercom Amplifier is designed for use with the TA205C Handset Intercom Suite Station and provides the amplification, control and power circuits needed to operate a complete apartment intercom system. Using solid-state technology and constructed with high-quality components, this amplifier is designed for long-lasting reliable performance. Optional accessories are available to provide additional functions such as dual-entrance operation, post office door release, etc.