The service manual for the Hammarlund RBG-2 radio receiving equipment provides detailed instructions for setup, operation, and troubleshooting of the radio receiver and loudspeaker components, covering frequency ranges from 0.54 to 31.0 megacycles and requiring a 115-volt power supply. It includes information on the equipment's technical features, such as the superheterodyne type receiver, crystal filter for adjustable selectivity, and the use of a tuning meter for signal strength indication, along with guidelines for reporting failures and ensuring compliance with the contractual guarantee.
Manual Overview
The Hammarlund MANUAL for the RBG-2 Radio Receiving Equipment provides detailed instructions for troubleshooting, diagnostics, calibration, and maintenance at the board level. The equipment operates within a frequency range of 0.54 to 31.0 megacycles and requires a 115-volt power supply. It features a superheterodyne receiver design with stages for radio frequency amplification, intermediate frequency amplification at 455 kilocycles, and a beat-frequency oscillator for CW code reception. The manual emphasizes the importance of using the tuning meter for signal strength indication and provides guidance on using the crystal filter for enhanced selectivity. Troubleshooting involves checking the automatic volume control and limiter circuits, which are crucial for managing interference. The manual also outlines the procedure for reporting equipment failures to the Bureau of Ships, ensuring that any defective parts are replaced under the contractual guarantee. Calibration and adjustments focus on maintaining optimal performance of the high-frequency oscillator and the crystal filter settings.
Quick Issues Covered
- Diagnose power-up failures in RBG-2 model radio receivers.
- Calibrate intermediate frequency stages for optimal performance.
- Trace circuit schematics for troubleshooting signal path issues.
Overview
The product is the RBG-2 Radio Receiving Equipment, which includes a Radio Receiver CHC-46140 and a Loud Speaker CHC-49154. It is manufactured by Hammarlund Manufacturing Co., Inc. The instruction book covers Models RBG, RBG-1, and RBG-2, detailing their frequency range of 0.54 to 31.0 megacycles and operation on a 115-volt supply. The manual is intended for Navy personnel involved in design, instruction, operation, and installation of radio and sound equipment. The RBG-1 model differs by having a radio receiver unit designed for a 25-cycle power source, while the RBG and RBG-2 models are designed for a 50-60 cycle power source.
Specifications
- FREQUENCY RANGE .54 TO 31.0 MEGACYCLES
- SUPPLY 115 VOLTS
- 60 CYCLES ONE PHASE
- 25 CYCLES ONE PHASE
- Type CHC-46140 Radio Receiver
- Type CHC-46163 Radio Receiver
- Power required for operation.—115/1/50-60, 60 watts
- IF frequency.—455 ke.
- Type of reception. CW, MCW, and voice.
- Input.—Tuned circuit with antenna compensator.
- Output impedance.—600 ohms for phones and 5,000 ohms for loudspeaker.
- Power output.—10 mw. to phones and 2 watts to loudspeaker.
- Antenna.—Balanced feed line or straight antenna.
- Radiation frequency.—Band 2: safe; band 1: very close to limit, just above at 540 and 1300 ke; bands 3.
Controls & Indicators
Refer to the PDF for details.
Installation / Setup
Refer to the PDF for details.
Operation
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Troubleshooting & Error Codes
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Safety & Warnings
Refer to the PDF for details.
Download MANUAL Service manual (PDF – 26.7 MB)
Hammarlund CHC-46140 Manual: Provides instructions for troubleshooting, calibrating, and servicing the CHC-46140 model. File size: 26.7 MB.
- Brand: Hammarlund-chc-46140-instructions-and-service
- Model: MANUAL
- Type: Service manual
- File size: 26.7 MB
Overview
Brief overview of the product.
Specifications
- Key spec 1
- Key spec 2
Controls & Indicators
Control panel/button layout.
Installation / Setup
- Step 1…
- Step 2…
Operation
Basic usage, modes, cycles.
Troubleshooting & Error Codes
| Issue / Code | Fix |
|---|---|
| Example | How to fix… |
Safety & Warnings
- Important warning…
Downloads
Download MANUAL service manual (PDF)
Overview
The Hammarlund CHC-46140 is a precision communication receiver designed for reliable shortwave radio reception. Widely used by radio enthusiasts and professionals alike, this device offers exceptional sensitivity and selectivity, enabling clear reception of a broad range of frequencies. Ideal for monitoring international broadcasts, amateur radio transmissions, and utility signals, the CHC-46140 combines robust construction with advanced tuning capabilities for optimal performance.
Main Features and Specifications
- Frequency Range: 540 kHz to 30 MHz
- Superheterodyne receiver design for enhanced selectivity
- Multiple tuning bands with fine frequency adjustment
- Built-in S-meter for signal strength indication
- Adjustable bandwidth filters for improved audio clarity
- External antenna input for flexible signal reception
- Durable metal chassis with easy-to-read analog dial
Basic Usage and Operation Tips
To operate the CHC-46140, first connect a suitable antenna to the external antenna input. Power on the unit and select the desired frequency band using the band selector switch. Use the main tuning knob to fine-tune the frequency, while observing the S-meter to identify the strongest signals. Adjust the bandwidth filter settings to optimize audio clarity based on the type of transmission. Regularly calibrate the dial to ensure accurate frequency readout.
Troubleshooting and Maintenance
If you experience weak reception or distorted audio, check antenna connections and ensure the device is properly grounded. Clean the tuning dial and control knobs periodically to prevent dust buildup. For persistent issues, inspect internal components such as tubes or capacitors, and replace any faulty parts as indicated in the service manual. Always disconnect power before performing maintenance.
Safety Reminder
Always operate the Hammarlund CHC-46140 in a dry, well-ventilated area away from direct heat sources. Avoid exposing the device to moisture or extreme temperatures. Disconnect the power supply before servicing to prevent electric shock. Follow all safety guidelines outlined in the manual to ensure safe and reliable operation.
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