The Drake PS-7 Power Supply manual provides detailed instructions for setting up and operating the unit, including adjusting output voltage and current, changing primary voltages, and ensuring proper cooling. It also covers troubleshooting procedures such as resetting the unit after a current overload and replacing fuses in case of overvoltage protection activation.
Manual Overview
The Drake PS-7 Power Supply is a 13.6-volt DC regulated unit capable of delivering up to 25 amps continuously. It features excellent voltage regulation through a silicon monolithic integrated circuit and offers adjustable output voltage and current via internal controls preset to 13.6 volts at 25 amps. The unit includes short circuit and overvoltage protection, with a programmable primary voltage range of 100, 120, 200, and 240 VAC at 50-60 Hz. For demanding operations, such as extended RTTY or SSTV transmissions, the optional FA-7 Cooling Fan is recommended. In case of current overload or short circuit, the regulator circuit will shut down automatically, and resetting can be done by toggling the power switch or disconnecting the AC input. Overvoltage protection is provided by an SCR crowbar that grounds the output if the voltage exceeds 16 VDC, opening the primary fuse. The PS-7 is factory set for 120 VAC but can be reprogrammed for other voltages by adjusting the programming plate and replacing the fuse accordingly. The unit supports linear amplifier connections and is serviceable at the factory for a fee.
Quick Issues Covered
- Diagnose power-up failures with voltage and current adjustments.
- Identify overvoltage protection triggers and reset procedures.
- Trace circuit schematics for fuse and regulator board locations.
Overview
The PS-7 Power Supply, Model 1502, is a 13.6 volt DC regulated power supply capable of delivering up to 25 amps of continuous current. It features excellent voltage regulation, short circuit and overvoltage protection, and programmable primary voltages. The manual covers aspects such as current overload protection, overvoltage protection, line voltage programming, and connections for use with a linear amplifier. It also provides information on factory service and specifications including AC input, DC output, connectors, dimensions, and weight.
Specifications
- AC INPUT: 100, 120, 200, or 240 Volts AC, + 10% 50-60 HZ.
- DC OUTPUT: 13.6 Volts DC with less than 3mV RMS of ripple at 25 amperes load.
- DC CURRENT: 25 amperes continuous.( at 25°C. ambient )
- DC AUX VOLTS: 13.6 VDC regulated.
- DC AUX CURRENT: 1ampere maximum.
- CONNECTORS: Aux DC Phono Jack
- ALC Phono Jack
- VOX Contact Phono Jack
- Fan AC
- Ground Connection
- DIMENSIONS: Width-13-3/4” (34.93 cm.)
- Height-5-1/4” (13.34 cm.)
- Depth-12-1/2” (31.75 cm.)
- WEIGHT: 32-14 lbs. (15 kg)
Controls & Indicators
Refer to the PDF for details.
Installation / Setup
Ensure adequate clearance around the PS-7 Power Supply for proper air circulation, especially around the heat sinks. Avoid placing objects on top of the unit to prevent overheating. The PS-7 is factory set for 120 VAC 50-60 Hz operation, but primary input voltage can be changed by adjusting the programming plate and switches. Use the correct type and rating of fuses for different voltage settings. For demanding duty cycles or higher ambient temperatures, the optional FA-7 Cooling Fan is recommended.
Operation
Refer to the PDF for details.
Troubleshooting & Error Codes
Refer to the PDF for details.
Safety & Warnings
Care should be taken to ensure that adequate clearance is provided around the PS-7 for proper circulation of air, especially around the heat sinks. Avoid placing books, papers, or other pieces of equipment on top of the unit as overheating could result. When the PS-7 is subjected to a current overload or short circuit condition, the regulator circuit will automatically shut down. The unit may be reset by momentarily switching the ON-OFF switch on the TR-7 to OFF or by removing the AC primary voltage to the PS-7. The power transformer is protected by an 8 ampere type ABC fuse on primary voltages of 100 or 120 VAC or a 4 ampere type MTH fuse on 200 or 240 VAC. This fuse should be replaced with another fuse of the same type and rating. The auxiliary DC output is internally fused with a 1 amp type MDL fuse. This is located inside the unit, on the regulator P.C. board. This fuse should be replaced only with another fuse of the same type and rating. If the PS-7 regulator section should fail or one of the pass transistors should short, the unit will automatically shut down. If the DC output voltage should soar above 16 VDC, an SCR crowbar clamps the output to ground to protect the load and open the primary fuse. This fuse should be replaced with another of the same type and rating after determining the cause of the overload.
Download MANUAL Service manual (PDF – 587.5 KB)
Drake PS-7 Manual: Guide for troubleshooting, calibrating, and servicing the PS-7 model. File size: 587.5 KB.
- Brand: Drake-ps-7-instruction-and-service
- Model: MANUAL
- Type: Service manual
- File size: 587.5 KB
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)
Drake-ps-7 Instruction and Service Manual Overview
The Drake-ps-7 is a precision power supply unit designed for reliable and stable voltage delivery in various electronic and communication applications. Renowned for its robust construction and consistent performance, the Drake-ps-7 is ideal for both professional and hobbyist use, ensuring your equipment operates efficiently and safely.
Main Features and Specifications
- Output Voltage Range: Adjustable from 0 to 15 volts DC
- Maximum Current Output: 7 Amperes
- High stability with low ripple and noise
- Built-in overload and short-circuit protection
- Analog voltage and current meters for precise monitoring
- Compact and durable metal chassis
- Cooling fan for temperature regulation during extended use
Basic Usage and Operation Tips
Before powering on the Drake-ps-7, ensure all connections are secure and correct polarity is observed. Adjust the voltage knob slowly to the desired output level and monitor the current meter to avoid exceeding the device or load limits. Use the built-in meters to verify output parameters during operation. Always allow the unit to warm up for a few minutes to stabilize output before connecting sensitive equipment.
Troubleshooting and Maintenance
If the power supply fails to output voltage, first check the input power source and fuses. Inspect all cables and connections for damage or looseness. In case of overheating, ensure the cooling fan is operational and vents are free from dust or obstructions. Regularly clean the exterior and ventilation areas with compressed air to maintain optimal airflow. For persistent issues, consult the detailed service manual or contact qualified service personnel.
Safety Reminder
Always operate the Drake-ps-7 in a dry, well-ventilated environment away from flammable materials. Never open the chassis while the unit is connected to power to avoid electrical shock. Use appropriate protective equipment and follow all safety guidelines outlined in the manual to ensure safe and effective operation.