Specifications

PK-900/PSK Upgrade Kit

Section 1

PSK Sound Card Interface Board Installation

Installation steps

If you have purchased a PK-900 DSP upgrade kit, install it before you install the PSK upgrade kit.

Please check the contents of the kit at this time. You should have received:

1 PK-900/PSK Upgrade assembly

1 Eprom I.C. ver. 7.3

1 PAL I.C. ver. C (not used with PK-900/DSP units)

2 cables – 3.5 mm to 3.5 mm stereo phone jack – 6 ft.

1 PK-900/PSK installation and Operation instructions

1 Warranty card

1 Timewave CD ROM (also contains this document in .pdf format)

Here are the tools you will need:

Wire Cutters

Phillips Screwdriver

Needle nose pliers

Flat head screwdriver

3/16” hex nut driver

Solder pencil and solder

Solder sucker tool or solder wick for cleaning the pads on C40, C89 and

the R253

Clear an area to work on your PK-900. You should take standard anti-static electricity precautions when

working on any ham equipment.

Here are the steps in the upgrade procedure:

Disassembly

Keep all removed parts, some are necessary to re-assemble the PK-900.

1) Remove Power

2) Remove 2 hex jack screws on either side of the RS-232 SERIAL jack screw.

Use a 3/16” hex nut driver to avoid scarring the jack screw finish.