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Heathkit Mains Power Supply
HP-20 HP20
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Component Values &
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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.
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HP-20 Power Supply
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Manual
with Circuit
Component Values &
Layout
Details Below
As a 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.
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HP-20 Power Supply
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|
Manual
with Circuit
Component Values &
Layout
Details Below
As a 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.
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Manual
with Circuit
Component Values &
Layout
Details Below
As a Download
Click Here
|
Heathkit Power Supply HP-20
HP20
Manuals are Available Worldwide as a Download.Condensed Manual
with Circuit 12 pages
Manual 12 A4 pages worldwide
( For all Payment Options )
( Please Click the Payment Links Below )
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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. |
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