LDG TW-1 User Manual

LDG TW-1

Talking Wattmeter

St. Leonard MD 20685-2903 USA

LDG Electronics

1445 Parran Road, PO Box 48

Phone: [phone] Fax: 410-

586-8475

www.ldgelectronics.com

[e-mail]

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LDG TW-1 Talking Wattmeter

Table of Contents

Introduction 2
Jumpstart, or “Real hams don’t read manuals!” 3
Specifications 3
Getting to know your TW-1 4
Installation 6
Setup 6

Language 6

Speech mode 6

Volume 7

Speech Operation 8
Tone Operation 8
Application Notes 9
Care and Maintenance 10
Technical Support 10
Warranty and Service 10
Feedback 10

Introduction

Congratulations on selecting the LDG TW-1 talking wattmeter. The TW-1 is a breakthrough
product, providing accurate and precise RF power and SWR readings aurally, by synthesized
voice over a self-contained speaker. It is ideal for situations when you need to watch something
else while making an adjustment, or for visually impaired hams.

LDG pioneered the automatic, wide-range switched-L tuner in 1995. From its laboratories in St.
Leonard, Maryland LDG continues to define the state of the art in this field with innovative
automatic tuners and related products for every amateur need.

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Jumpstart, or “Real hams don’t read manuals!”

Ok, but at least read this one section before you transmit:

1. Attach the RF input jack (right connector when viewed from back) to your transmitter or
transceiver with a 50 ohm coaxial jumper cable.

2. Attach your antenna to the RF output (left connector when viewed from back).

3. Connect a 12 volt power supply capable of delivering 200 ma to the 2.5 x 5.5 mm

coaxial

power jack (center positive).

4. While transmitting RF, press and release the left-hand button. The unit will speak the forward
power level. Adjust the volume to the desired level.

5. While transmitting RF, press and release the center button. The unit will speak the reverse
power level.

6. While transmitting RF, press and release the right-hand button. The unit will speak the SWR.

7. The unit will turn itself off after use.

Specifications

• 0 - 2,000 watts, auto-ranging

• +/- 5% accuracy (measured on 14 MHz), 10% on 6 meters

• 1 watt or 1% power resolution

• Adjustable volume

• Verbose or terse speech

• Tone mode for continuous feedback

• Speaks in English, Spanish or German

• Size: 5 x 4.5 x 3 inches

• Requires 12 volts at 200 ma, 2.5 x 5.5 mm jack, center positive

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