Heathkit-euw-15-hv-dc-power-supply SCHEMATICS – Manual (PDF)

The Heathkit manual for the EUW-15 Power Supply provides detailed instructions for setup, operation, and troubleshooting, including specifications for voltage outputs, regulation, and controls such as the divider-regulator switch and voltage adjustment. It also includes information on the internal components like the tube complement and the schematic for proper wiring and voltage measurement.

• Brand: Heathkit
• Model: SCHEMATICS
• Type: manual
• File size: 122.4 KB

Manual Overview

The Heathkit SCHEMATICS manual provides detailed guidance on troubleshooting, diagnostics, and adjustments for the EUW-15 Power Supply. For troubleshooting, the manual emphasizes checking the power supply’s output voltages and ensuring they fall within specified ranges: 200 to 350 volts DC for B+ and 6.3 volts AC for filament voltage. Error codes are not explicitly detailed, but diagnostics involve measuring voltage variations and ensuring they remain within 1% from no load to full load at 300 volts. Calibration involves setting the regulator for a 300 V output with no load and using an 11 megohm input VTVM for accurate voltage readings. Board-level guidance includes confirming resistor and capacitor values, with all resistors being 1/2 watt unless specified otherwise. The manual also highlights the importance of using the correct fuses and ensuring proper connections, especially when using the voltage divider as a variable load. Adjustments are made using the REGULATOR VOLTAGE control and various switches, such as the DIVIDER-REGULATOR and PRIMARY VOLTAGE switches.

Quick Issues Covered

• Diagnose power-up failures with voltage-doubler operation checks.
• Calibrate B+ voltage output for less than 1% variation.
• Trace circuit issues using detailed schematic diagrams.

Overview

Refer to the PDF for details.

Specifications

• B+ Voltage Output: 200 to 350 volts DC regulated, at 0 to 100 milliamperes continuous
• Filament Voltage Output: 6.3 volts AC at 3 amperes
• B+ Regulation: Output variation less than 1% from no load to full load at 300 volts, Output variation less than +1 volt for a +10 volt variation in the AC line input, Less than 10 millivolts rms ripple, jitter, and noise
• B+ Output Impedance: Less than 10 ohms from 5-100,000 cps
• Divider Voltages (Unregulated): Approximately 500, 400, 300, 200, and 100 volts
• Voltage Divider: Internal, using five 1500 ohm 10 watt resistors; also can be used as a variable internal load
• Variable Load: Voltage divider can be connected as a variable load, but current must not exceed 80 milliamperes
• Tube Complement: 1 – 6L6GC, series regulator, 1 – 6BH6, control amplifier, 1 – OB2, voltage regulator
• Controls And Switches: DIVIDER VOLTAGE (or variable load switch), DIVIDER-REGULATOR switch, REGULATOR VOLTAGE (MIN-MAX) control, POWER (ON-OFF) switch, HIGH VOLTAGE (ON-OFF) switch, PRIMARY VOLTAGE SWITCH (on the chassis)
• Output Terminals: DC+ and DC-, FILament (6.3 VAC), Meter, Chassis ground

Controls & Indicators

The front-panel controls/indicators present are:

– DIVIDER VOLTAGE (or variable load switch)
– DIVIDER-REGULATOR switch
– REGULATOR VOLTAGE (MIN-MAX) control
– POWER (ON-OFF) switch
– HIGH VOLTAGE (ON-OFF) switch
– PRIMARY VOLTAGE SWITCH (on the chassis)

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 SCHEMATICS Manual (PDF – 122.4 KB)

Heathkit-euw-15-hv-dc-power-supply SCHEMATICS manual assists technicians in troubleshooting and repairing power supply circuits.

• Brand: Heathkit-euw-15-hv-dc-power-supply
• Model: SCHEMATICS
• Type: Manual
• File size: 122.4 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 SCHEMATICS manual (PDF)

Heathkit EUW-15 HV DC Power Supply Overview

The Heathkit EUW-15 HV DC Power Supply is a reliable and precise high-voltage power source designed for laboratory, testing, and experimental applications. This unit delivers stable DC voltage output suitable for powering electronic circuits, vacuum tubes, and other high-voltage devices. Its robust design ensures consistent performance, making it an essential tool for engineers, technicians, and hobbyists working with high-voltage equipment.

Main Features and Specifications

• Output Voltage: Adjustable high-voltage DC output up to 15 kV
• Current Rating: Maximum output current of 15 mA
• Voltage Regulation: Excellent load and line regulation for stable output
• Built-in Overload and Short-Circuit Protection
• Compact and sturdy chassis for durability and ease of use
• Analog meters for voltage and current monitoring
• Manual voltage adjustment knob with fine control

Basic Usage and Operation Tips

Before powering on the Heathkit EUW-15, ensure all connections are secure and the output terminals are properly insulated. Start with the voltage control set to minimum, then gradually increase the voltage while monitoring the output meters. Always operate the power supply within the specified current limits to avoid damage. Use appropriate cables rated for high voltage and maintain a safe distance from exposed terminals during operation.

Troubleshooting and Maintenance

If the output voltage is unstable or fails to reach the desired level, check for loose connections or damaged cables. Inspect internal components periodically for signs of wear or overheating. Clean the unit’s exterior and ventilation openings to prevent dust buildup. If the unit trips its overload protection frequently, verify the load does not exceed the rated current. For persistent issues, consult the schematic manual for detailed diagnostics and repair procedures.

Safety Reminder

High-voltage DC power supplies pose serious electrical hazards. Always follow proper safety protocols, including using insulated tools and wearing protective equipment. Never touch the output terminals or connected circuits while the unit is energized. Disconnect power before performing any maintenance or adjustments. Keep the power supply in a dry, well-ventilated area away from flammable materials.