Heathkit Mains Power Supply HP-20 HP20


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Layout Details Below
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See also : - 

Heathkit Mobile Receiver HR-20 Click Here

Heathkit Mobile Transmitter HX-20 Click Here

HR20 HX20 HP20 Front View.jpg (25292 bytes)


Heathkit Mains Power Supply HP-20 HP20

Description

The Heathkit Model HP-20 Utility Power Supply was designed primarily to furnish all the necessary power for Heathkit Mobile Transmitters and Receivers, when they are used as fixed station units.

Being a utility power supply allows it to be used to supply power to many other makes and types of amateur equipment as well.

The Model HP-20 will supply a full 120 watts of power, 600 volts at 200 milliamperes.
A half voltage tap (300 volts) is available for supplying the receiver, or low level stages of the transmitter.
In addition 130 volts of negative bias is available at a current rating (30 ma) consistent with voltage regulator service.
This feature allows use of the HP-20 with SSB equipment requiring regulated bias voltage.

The loads on the high and low voltage terminals of the supply should be adjusted so that the total power drain will not exceed 120 watts.
A typical example would be a drain of 600 volts at 150 milliamperes from the high voltage tap, which equals 90 watts.
This would leave 30 watts available at the low voltage tap, or 300 volts at 100 milliamperes. The total of the two will equal the 120 watt rating of the supply.

In event of a complete short circuit in any of the secondary circuits of the supply, two fuses of the proper current rating afford adequate protection.

The supply features excellent static regulation, combined with the advantages of good dynamic regulation, achieved through the use of high value filter capacitors.

A full-wave voltage doubler circuit affords good efficiency along with circuit economy.
The resultant ripple frequency is twice the source frequency and, therefore, is easier to filter.
A further advantage is that each capacitor in the doubler circuit requires a DC rating of only half the output voltage, since the capacitors are in series.

HP20 Front View.jpg (16273 bytes)

HP-20 Power Supply

Manual with Circuit
Component Values &
Layout Details Below
On Paper CD or Download

Click Here


Specifications

Power Requirements
 
117 volts or as my unit 240 AC, 50/60 cycles, 200 watts.

Chassis Dimensions
9 long, 4-3/4 wide, 2-1/4 high.

Overall Height
6 inches (with cover and four rubber feet).

Total Continuous DC Output Power
(
1) 120 watts - 600 volts at 200 milliamperes or 120 watts - 600 volts at 150 milliamperes
and 300 volts at 100 milliamperes.

(2) Bias
- 130 volts at 30 milliamperes. (Available in addition to above.)

Filament Power
6.3 volts at 8 amperes, or 12.6 volts at 4 amperes.

Regulation
50% load to 100% load, from high voltage tap) Approximately 10%.

Ripple Content Less than 1%.

Net Weight 12 lbs.

Shipping Weight 15 lbs.

HP20 Bottom View.jpg (29854 bytes)

HP-20 Power Supply

Manual with Circuit
Component Values &
Layout Details Below
On Paper CD or Download

Click Here


The Manual Consists of  the Following

TABLE OF CONTENTS


Specifications

Introduction

Theory of Operation

Construction Notes

Parts Lists

Testing The HP-20 Power Supply

Operation

In Case Of Difficulty

Schematic Circuit

Layout

This Version of the Manual was supplied with factory built Units.
It does not contain full construction details.

Cables.jpg (32154 bytes)

Manual with Circuit
Component Values &
Layout Details Below
On Paper CD or Download

Click Here


Heathkit Power Supply HP-20 HP20
Manuals are Available Worldwide as a Download on CD or Paper Copy.

Condensed Manual with Circuit 12 pages
Manual 12 A4 pages worldwide

Printed Paper Copy or on CD are Plus Postage.

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We do all we can to provide the very best that is available for you.
But in the unlikely event that any data should not be as you expected.
A refund is always available. Kind Regards Allen and Alanna.


Manuals are Available Worldwide as Paper Copy on CD or as a Download

Thank you for your interest. Allen and Alanna G0RIT
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Revised: January 20, 2016