Heathkit-br-2-broadcast-band-receiver-schematics 3 – Manual (PDF)

The Heathkit Broadcast Band Receiver Model BR-2 manual provides detailed instructions for setting up and operating the radio, including specifications for the tuner operation and power requirements. It also includes troubleshooting guidance, such as wiring diagrams and voltage measurements, to ensure optimal performance and correct any issues.

• Brand: Heathkit
• Model: 3
• Type: manual
• File size: 951.2 KB

Manual Overview

The Heathkit Broadcast Band Receiver Model BR-2 manual provides detailed guidance on troubleshooting, diagnostics, and calibration for technicians. The troubleshooting flow involves checking power supply connections, verifying tube functionality, and ensuring proper wiring of components like the 12BE6 Pentagrid Converter and 12BA6 I.F. Amplifier. Error diagnostics focus on verifying voltages at key points, such as Points A and C, using the selector switch in the receiver position to ensure accurate readings. Calibration involves adjusting the tuner and oscillator coils to maintain optimal reception across the 550 ke to 1620 ke frequency range. Board-level guidance includes detailed wiring diagrams for components and transformers, emphasizing correct connections for the dual primary power transformers to accommodate either 110 volts or 220 volts. Technicians are advised to ensure all connections are secure and to use high impedance inputs for optimal performance with crystal or ceramic phono pickups.

Quick Issues Covered

• Diagnose power-up failures with 5Y3 rectifier checks.
• Calibrate using 12BA6 I.F. amplifier adjustments.
• Troubleshoot audio issues via 12AV6 detector and amplifier.

Overview

HEATHKIT BROADCAST BAND RECEIVER MODEL BR-2 is a radio receiver covering frequencies from 550 ke to 1620 ke with a built-in high sensitivity rod type antenna and a 5 1/2″ PM 4 ohm voice coil speaker. It includes a tuner with high impedance suitable for any amplifier input with a resistance of 100,000 ohms or more and provides a 110 V outlet for additional devices. The receiver uses a 1 – 5Y3 rectifier, 1 – 12A6 beam power amplifier, 1 – 12AV6 detector, A.V.C. and audio amplifier, 1 – 12BA6 I.F. amplifier, and 1 – 12BE6 pentagrid converter. It requires 105-125 V 50-60 cycles AC power and consumes 40 watts. The dimensions are 11 1/2″ wide, 5 3/4″ high, and 6 3/4″ deep.

Specifications

• Radio
• 550 ke to 1620 ke
• 455 ke
• Built-in High Sensitivity Rod Type
• Speaker (included) 5 1/2" PM 4 ohm Voice Coil
• Tuner Operation
• High impedance to any amplifier input with resistance of 100,000 ohms or more. 110 V outlet provided for amplifier, phono player, etc.
• 1 megohm high impedance for optimum performance with any good quality crystal or ceramic phono pickup.
• 1 – 5Y3 Rectifier
• 1 – 12A6 Beam Power Amplifier
• 1 – 12AV6 Detector, A.V.C. and Audio Amplifier
• 1 – 12BA6 I. F. Amplifier
• 1 – 12BE6 Pentagrid Converter
• Power Requirements 105-125 V 50-60 cycles AC 40 watts
• Dimensions 11 1/2" wide, 5 3/4" high, 6 3/4" deep

Controls & Indicators

Refer to the PDF for details.

Installation / Setup

Refer to the PDF for details.

Operation

Refer to the PDF for details.

Troubleshooting & Error Codes

Refer to the PDF for details.

Safety & Warnings

Refer to the PDF for details.

Download 3 Manual (PDF – 951.2 KB)

Heathkit BR-2 Receiver Schematics PDF (951.2 KB): Aids technicians in troubleshooting and repairing the Model 3 broadcast band receiver.

• Brand: Heathkit-br-2-broadcast-band-receiver-schematics
• Model: 3
• Type: Manual
• File size: 951.2 KB

Overview

Brief overview of the product.

Specifications

• Key spec 1
• Key spec 2

Controls & Indicators

Control panel/button layout.

Installation / Setup

1. Step 1…
2. Step 2…

Operation

Basic usage, modes, cycles.

Troubleshooting & Error Codes

Safety & Warnings

• Important warning…

Downloads

Download 3 manual (PDF)

Heathkit BR-2 Broadcast Band Receiver Overview

The Heathkit BR-2 Broadcast Band Receiver is a vintage radio receiver designed to tune into broadcast band frequencies with high sensitivity and clarity. Ideal for radio enthusiasts and technicians, this receiver covers a wide range of AM broadcast frequencies, allowing users to listen to local and distant stations with excellent audio quality. The BR-2 is known for its robust construction and straightforward design, making it a reliable choice for both hobbyists and professionals interested in broadcast band reception.

Main Features and Specifications

• Frequency Coverage: Standard AM broadcast band (540 kHz to 1600 kHz)
• Tuning Method: Analog dial with fine-tuning capability
• Audio Output: Built-in speaker and external speaker jack
• Power Supply: Operates on standard household AC power
• Intermediate Frequency (IF): Typically 455 kHz for improved selectivity
• Compact and durable chassis suitable for bench use
• Includes schematic diagrams for easy servicing and modification

Basic Usage and Operation Tips

To operate the Heathkit BR-2 receiver, first ensure it is properly connected to a power source and that the antenna is securely attached for optimal signal reception. Use the tuning dial to select the desired broadcast frequency. Adjust the volume control to a comfortable listening level. For clearer reception, fine-tune the dial slowly and minimize interference by positioning the receiver away from other electronic devices. Regularly check the antenna connections and maintain a stable power supply to ensure consistent performance.

Troubleshooting and Maintenance Notes

If the receiver experiences weak or distorted audio, verify all tube sockets and wiring connections are secure and free of corrosion. Replace any faulty vacuum tubes with compatible replacements. Clean the tuning capacitor and dial mechanism periodically to prevent stiffness or erratic tuning. Inspect the power cord for damage and replace it if necessary. Refer to the included schematic diagrams for detailed circuit troubleshooting and component testing.

Safety Reminder

Always unplug the Heathkit BR-2 receiver before performing any maintenance or repairs to avoid electric shock. Use caution when handling vacuum tubes, as they can become hot during operation. Ensure the unit is operated in a dry environment away from moisture and excessive dust to prevent electrical hazards and equipment damage.