Ten-Tec 1254 Receiver Processor Upgrade Installation
Overview
The upgrade kit adds to a Ten-Tec 1254 shortwave radio receiver finer step frequency tuning,
more memory channels, new radio features, and removal of the need for a backup battery. It
does this by replacing the radio's PIC processor with new firmware in a new Cypress processor
mounted on a daughter board to fit the radio's existing processor socket. An auxiliary circuit
board, cables, and new aluminum rear panel add a line level audio output, and a computer CAT
computer control interface. This computer interface is configured as either an RS-232 or mini-
USB connection.
The upgrade kit does not change the radio as supplied by Ten-Tec in it's construction or
alignment procedures. The alignment can be done with either processor.
1254 Upgrade Kit Contents
• Precision laser cut aluminum rear panel with mounted auxiliary interface board, 3.5mm line
level output jack, computer communications connector with transmit and receive status LEDs,
and AGC level input connector.
• Cypress processor mounted on a daughter board with components for analog and digital
interfaces.
• Shielded analog audio input coax to connect the processor board to the radio's main board.
• Optional Ten-Tec 1254 display board mounted single auxiliary LED.
1
• Ribbon cable to connect the processor board to the auxiliary interface board.
• AGC tie in wire and connector from the radio's main board to the auxiliary board.
1 The additional LED supplied in the kit that can be installed in an existing, but unused location on the
display board.
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