SGC ADSP K2 Installation Instruction

K2 ADSP2 Installation
High Power Board
Catalog Number 70-12

This document describes procedures that could result in voiding of the warranty of your radio.

If these procedures are not precisely and properly carried out, it could result in a radio that does not work or is damaged.

Furthermore, while reasonable efforts have been made to assure the accuracy of this information, it is possible that there are some errors, or that your radio is of a slightly different

It is assumed that anyone following suggestions made in this document is already thoroughly familiar with the technologies and techniques involved and possesses the necessary

If you choose to do the installation outlined, you do so at your own risk. You are solely responsible for any damage, voiding of warranty, or other harm that may come about

by following these procedures. It is very strongly recommended that, if you maintain your own radio, you thoroughly familiarize yourself with the transceiver service manual.

version than the one used for testing and thus, differences may exist. You are expected to take total responsibility for your own actions.

skill and knowledge to make their own judgment as to the appropriateness and validity of the information.

If you don't have one, get one!

CAUTION: Soldering and desoldering of very small Surface Mount Components may be required to perform this installation

IMPORTANT NOTE: Support for the ADSP2 board will be provided by SGC
exclusively by email. Please write to [e-mail] for assistance if needed.

1. Technical Specifications

Specification Low Audio High Audio
Size

Weight

Audio Limits
Min Input
Max Input
Max Output
Power Output

Current Consumption
idle
full out

Noise Reduction
Time Delay
Tone Rejection

Filters (3dB Bandwidth)
Voice
CW Wide
CW Narrow
Out of Band Rejection

1.7 X 1.475” 2.645 X 1.475”

0.6 oz 1.1 oz

10 mv RMS 100 mv RMS
150 mv RMS 5 volt RMS
.5 v RMS 9 v RMS
5 Watts RMS

80 mA 110 mA
80 mA 500 mA

X1 X2
13 dB 26 dB

6.5 ms 13 ms

-50 dB -65 dB

300-2100 Hz
400-900 Hz
600-700 Hz

-45 dB

SGC Inc. SGC Building, 13737 SE 26th St. Box 3526 Bellevue, WA. 98009 USA

Fax: [phone], Tel: [phone] or 1-800-259-7331

E-mail: [e-mail] • World Wide Web: www.sgcworld.com

©April 2003 SGC Inc

K2 ADSP2 Installation
High Power Board
Catalog Number 70-12

2. Preparation

The ADSP2 installation provides you with an unprecedented ADSP capability, far beyond
what you can find on most amateur radio transceivers.

Every possible effort has been made to provide you with a simple, easy to use product.
One where you can concentrate on your communication and not on fiddling with knobs.
SGC’s ADSP2 will give you years of service improving your ability to communicate.

¨ Prepare your work area

¨ Assemble your tools and parts

ADSP2 board
ADSP2 switch assembly
Double-stick tape for mounting the board
Tools for disassembling your transceiver
soldering iron suitable for working with Surface Mount Devices

3. Install the ADSP2 Board

¨ Open your transceiver

¨ Remove the backing from the double-stick foam tape and

attach the ADSP2 assembly into a convenient location

On the K2, space inside is limited and some circuits are sensitive to the presence of other
boards. SGC has found that a workable solution is to mount the board externally on the
back of the K2. This eliminates any conflict between boards. We fabricated a small
aluminum bracket in the shape of the letter ‘U’ and mounted it sideways on the back with
double-stick foam tape with the board inside as shown in the picture.

SGC Inc. SGC Building, 13737 SE 26th St. Box 3526 Bellevue, WA. 98009 USA

Fax: [phone], Tel: [phone] or 1-800-259-7331

E-mail: [e-mail] • World Wide Web: www.sgcworld.com

©April 2003 SGC Inc

K2 ADSP2 Installation
High Power Board
Catalog Number 70-12

¨ Connect the ADSP

2

into the signal path

The following connections will be made between connector J2 on the ADSP2 board and
the K2:

Pin 2 to 12V DC
Pin 6 to DC ground
Pin 10 to audio in to the ADSP2
Pin 1 to the audio out from the ADSP2

The audio path should be broken at the output of the audio amplifier just before the
speaker. The only requirement at this point is that a minimum of 1 volt RMS and a
maximum of 10 volts RMS will appear at this point when using the High Power version
of the ADSP2. The board has coupling capacitors on its input and output.

SGC Inc. SGC Building, 13737 SE 26th St. Box 3526 Bellevue, WA. 98009 USA

Fax: [phone], Tel: [phone] or 1-800-259-7331

E-mail: [e-mail] • World Wide Web: www.sgcworld.com

©April 2003 SGC Inc

K2 ADSP2 Installation
High Power Board
Catalog Number 70-12

The board (shown below) has two connectors on it, J1 and J2. J1 is not used for any Hi
Power board wiring.

Connector J1

Connector J2

The diagram below shows the wiring for the J2 Connector:

Pin 10 Gray Audio In +

Pin 10 Gray Audio In +
Pin 9 Yellow Noise Select
Pin 8 Violet Audio In ­Pin 7 Red Filter Select
Pin 6 Black Switch Ground
Pin 5 Black DC Ground
Pin 4 N/C
Pin 3 Blue Audio Out ­Pin 2 White 12 VDC
Pin 1 Brown Audio Out +

Pin 1 Brown Audio Out +

The audio path should be broken at the output of the audio amplifier just before the
speaker. The only requirement at this point is that a minimum of 1 volt RMS and a
maximum of 10 volts RMS will appear at this point when using the High Power version
of the ADSP2. The board has coupling capacitors on its input and output.

SGC Inc. SGC Building, 13737 SE 26th St. Box 3526 Bellevue, WA. 98009 USA

Fax: [phone], Tel: [phone] or 1-800-259-7331

E-mail: [e-mail] • World Wide Web: www.sgcworld.com

©April 2003 SGC Inc