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

K2 ADSP2 Installation
High Power Board
Catalog Number 70-12

The speaker used with the ADSP2 Hi Power board must not be grounded. The positive
and negative leads from the speaker must connect to Pins 1 & 3 of the J2 connector on
the ADSP2 board. The speaker negative wire must not be tied to DC ground. If the
speaker is tied to ground in the transceiver, then Pin 8 should be connected in its place
and the speaker ground wire should be connected to Pin 3. If the speaker connection is
not grounded in the transceiver, then the two wires should be taken to the ADSP board
Pins 8 & 10 first and then the output from Pins 1 & 3 should be connected to the speaker
as shown.

In our K2 installation we tapped into the audio path just after C29, cutting the trace and
installing the board, but leaving C29 in place.

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

to get 12 VDC

K2 ADSP2 Installation
High Power Board
Catalog Number 70-12

R16 is a
convenient point

Cut after C29 to
install the ADSP2

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

ground

K2 ADSP2 Installation
High Power Board
Catalog Number 70-12

Your installation should look like this:

12 VDC can be taken from any point where it is convenient and the ground can be
connected to any convenient point which is connected to the chassis ground. The figure
above shows 12 VDC being taken from the 12 VDC side of R16 (see the schematic
above) and the picture below shows the ground connection being tapped off Pin 4 or 5 of
U9, both of which are grounded as shown in the schematic diagram:

Pin 4 & 5 can
be used for

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

If you’ve connected to pin 5 of U9, it should look like this:

¨ Route the ADSP

2

switch assembly out of the transceiver

body

¨ Connect the switch assembly to the switch wire connector

¨ Reassemble the transceiver

4. Test your transceiver

The switch buttons are assigned to their functions according to the diagram below:

Each switch steps through its functions in order as shown below under testing.

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

¨ Testing the ADSP Functions

o Press & Release the ADSP
o Press & Release the ADSP
o Press & Release the ADSP
o Repeat several times to verify operation

2

Pushbutton for Noise Reduction X1

2

Pushbutton for Noise Reduction X2

2

Pushbutton for No Reduction

¨ Testing the Filter Functions

o Press & Release the Filter Pushbutton for the Voice Filter
o Press & Release the Filter Pushbutton for the Wide CW Filter
o Press & Release the Filter Pushbutton for the Narrow CW Filter
o Press & Release the Filter Pushbutton for No Filter
o Repeat several times to verify operation

5. Installing the Switches

The switches may be installed in any convenient location. The specific choice of switches
was made to make it easy to mount on nearly any transceiver. Some people have chosen
to install their switches on the side of the unit, others have preferred the top, and some on
the front. Your specific installation will determine what the best location is.

SGC welcomes any suggestions regarding these switches to improve installation and
operation.

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

CAUTION: Overdriving the ADSP2 module may cause distortion. Backing off the level
of the input signal will avoid it.

SPECIAL NOTE: SGC is constantly seeking to improve the accuracy and ease of use of
it’s technical documentation. Any suggestions for improving this document will be much
appreciated by SGC Management.

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

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

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