The service manual for the Hallicrafters Model S-38 provides detailed instructions for setup, operation, and troubleshooting of the 6-tube AC/DC superheterodyne radio receiver, including information on band selection, control settings, and dial cord restringing. It also includes specifications for power supply, tube types, and replacement parts, ensuring proper maintenance and repair of the device.

• Brand: Hallicrafters
• Model: NO.2
• Type: service manual
• File size: 569.2 KB

Manual Overview

The Hallicrafters Model S-38 service manual provides detailed guidance for technicians working on this 6-tube AC/DC superheterodyne radio receiver. The manual emphasizes troubleshooting procedures, starting with checking the power supply voltage range of 105 to 125 volts and ensuring a power drain of 30 watts. It outlines the function of each tube, including the 12SA7 mixer-oscillator and the 35Z5GT power rectifier. For diagnostics, the intermediate frequency is set at 455 kHz, with sensitivity and image ratio specifications provided for various bands. Calibration involves adjusting the tuning capacitor and ensuring proper dial cord restringing, with specific instructions for both main and bandspread tuning. The manual includes a comprehensive parts list, detailing capacitors, transformers, and resistors, with part numbers for replacements. Technicians are advised to follow the control settings for preliminary test operations and to use the provided diagrams for accurate component placement and adjustments.

Quick Issues Covered

• Diagnose power-up failures with AC/DC line voltage checks.
• Calibrate IF frequency to 455 kHz for optimal sensitivity.
• Use schematics for circuit tracing and troubleshooting.

Overview

Model S-38 is a 6-tube AC/DC superheterodyne table model radio receiver. It features 4 bands of AM/CW reception with frequency ranges from 540 kc to 32.0 mc. The receiver includes provisions for AVC, noise limiting, BFO pitch, headset reception, standby operation, and bandspreading. The rear panel has connections for a line cord, antenna and ground connector strip, and a headset connector plug strip. It operates on 105 to 125 volts AC/DC with a power drain of 30 watts.

Specifications

• Model S-38 is a 6 tube AC DC superheterodyne table model radio receiver.
• Incorporates 4 bands of AM CW reception:
• – Band 1: 540 ke to 1650 kc
• – Band 2: 1650 ke to 3.0 me
• – Band 3: 3.0 me to 14.5 mc
• – Band 4: 14.3 me to 32.0 mc
• Provision for AVC, noise limiting, BFO pitch, headset reception, standby operation, and bandspreading.
• Rear panel connections: line cord with plug, antenna and ground connector strip, headset connector plug strip.
• Power supply data: 105 to 125 solis AC DC line voltage, power drain is 30 watts.
• Tube types and function:
• – 12SA7: mixer-oscillator
• – 12SK7: IF amplifier
• – 12SQ7G: detector, AVC, audio amplifier
• – 35L6GT: audio power amplifier
• – 12SQ7GI: BFO and ANL
• – 35Z5GT: power rectifier for AC operation

Controls & Indicators

Refer to the PDF for details.

Installation / Setup

Refer to the PDF for details.

Operation

Model S-38 is a 6-tube AC/DC superheterodyne table model radio receiver with 4 bands of AM CW reception. It includes features such as AVC, noise limiting, BFO pitch, headset reception, standby operation, and bandspreading. The rear panel has a line cord with a plug, an antenna and ground connector strip, and a headset connector plug strip. The power supply operates on 105 to 125 volts AC/DC line voltage with a power drain of 30 watts. The control settings for preliminary test operation include standby, volume, band selector, pitch control, speaker output, BFO, noise limiter, tuning, and bandspread.

Troubleshooting & Error Codes

Refer to the PDF for details.

Safety & Warnings

Refer to the PDF for details.

Download NO.2 Service manual (PDF – 569.2 KB)

Hallicrafters S-38 Service Bulletin No.2 PDF helps technicians troubleshoot and calibrate the S-38 radio model. File size: 569.2 KB.

• Brand: Hallicrafters-s-38-service-bulletin
• Model: NO.2
• Type: Service manual
• File size: 569.2 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 NO.2 service manual (PDF)