Workman 104 VHF/UHF SWR/Power Meter Instruction Manual

1. Introduction

The Workman 104 is a compact and reliable SWR (Standing Wave Ratio) and Power Meter designed for use with VHF and UHF radio systems. This device allows users to accurately measure the forward power output of their radio and the SWR of their antenna system, which is crucial for optimizing radio performance and preventing damage to equipment. Proper use ensures efficient power transfer and extends the lifespan of your radio.

This image displays the front panel of the Workman 104 SWR/Power Meter. It features a large analog meter with scales for SWR (1.5 to infinity) and Power (0 to 150 Watts). Below the meter, a three-position slide switch is visible for selecting SWR, SET, or PWR functions, along with a 'SET' adjustment knob. The top connector is labeled 'ANT' and the bottom connector is for the radio 'TX' connection.

2. Safety Information

• Always ensure proper connections before transmitting to prevent damage to the meter or radio.
• Do not exceed the maximum power rating of 150 Watts.
• Operate the device in a dry environment, away from moisture and extreme temperatures.
• Disconnect the device from the radio and antenna when not in use or during electrical storms.

3. Product Overview

The Workman 104 meter features a straightforward design for ease of use:

• Analog Meter: Displays SWR and Power readings. The 'W' scale indicates Watts (0-150W), and the 'SWR' scale indicates Standing Wave Ratio (1.5 to infinity).
• Function Switch: A three-position slide switch located below the meter. Positions are 'SWR', 'SET', and 'PWR'.
• SET Knob: A rotary knob used for calibration during SWR measurement.
• ANT Connector: SO-239 type connector for connecting to the antenna.
• TX Connector: SO-239 type connector for connecting to the radio's output.

4. Setup

Follow these steps to connect the Workman 104 to your radio and antenna system:

1. Ensure your radio is turned off.
2. Connect a coaxial cable from your radio's antenna output to the TX connector on the Workman 104.
3. Connect your antenna's coaxial cable to the ANT connector on the Workman 104.
4. Verify all connections are secure and properly tightened.

5. Operating Instructions

5.1. Measuring Power Output (Watts)

1. Set the Function Switch to the PWR position.
2. Turn on your radio.
3. Transmit a continuous carrier (e.g., by pressing the PTT button on your microphone).
4. Read the power output directly from the 'W' scale on the analog meter.
5. Release the PTT button when measurement is complete.

5.2. Measuring SWR (Standing Wave Ratio)

SWR measurement requires a two-step calibration process:

1. Set the Function Switch to the SET position.
2. Turn on your radio.
3. Transmit a continuous carrier.
4. While transmitting, adjust the SET knob until the meter needle aligns precisely with the 'SET' mark (often indicated by an arrow or a specific point on the scale, typically full scale deflection).
5. Without releasing the PTT button, quickly move the Function Switch to the SWR position.
6. Read the SWR value directly from the 'SWR' scale on the analog meter. A lower SWR value (ideally 1.5:1 or less) indicates a better match between your radio and antenna.
7. Release the PTT button when measurement is complete.

6. Maintenance

• Keep the meter clean by wiping it with a soft, dry cloth. Avoid abrasive cleaners or solvents.
• Store the device in a cool, dry place when not in use.
• Regularly check coaxial cable connections for wear or damage.

7. Troubleshooting

• No Meter Movement:
      - Ensure the radio is transmitting power.
      - Check all coaxial cable connections for proper seating and continuity.
      - Verify the Function Switch is in the correct position (PWR for power, SET/SWR for SWR).
• High SWR Reading:
      - Inspect your antenna for physical damage or improper tuning.
      - Check the coaxial cable connecting the meter to the antenna for shorts, opens, or damage.
      - Ensure the antenna is designed for the frequency you are operating on.
• Inaccurate Readings:
      - Re-perform the SWR calibration (SET procedure) carefully.
      - Ensure the radio's output power is stable during measurement.

8. Specifications

9. Warranty and Support

For warranty information or technical support regarding your Workman 104 SWR/Power Meter, please refer to the documentation provided at the time of purchase or contact Workman customer service directly. Keep your purchase receipt as proof of purchase.