HPSDR - LPU
"LPU" is the project-name for a simple HPSDR power supply. Although power supplies are widely available, the LPU will provide a convenient low-noise solution until the more complex Demeter power supply is completed. The LPU (as well as Demeter) are specifically designed for the HPSDR project.
The LPU will not take the place of Demeter; it is intended as an interim solution to power HPSDR boards until Demeter is completed.
LPU Feature List
Input power: 12.5V - 14.5V regulated DC input
Outputs: +12V@2A, +5V@2A, +3.3V@2A (opt), -12V@100mA
Poly fuse on each regulator input: +12, +5, +3.3V (opt), -12V regulators
Plugs into Atlas backplane ATX connector
Mounting holes allow direct mounting to Atlas backplane
Strap disable for -12V to reduce noise
Dual power-pole input connector
Internal dual power-pole output connector for PA or accessories
Estimated PCB size: (LxWxH): 119mm X 44mm X 40mm
Estimated overall size: (LxWxH): 137mm X 54mmX 60mm
The LPU accepts a 12VDC regulated input and produced the following outputs:
The LPU does not produce -5V or any standby voltages. It ignores the ATX power-on signal and is always on. There is a jumper to shut off the -12V switching regulator when it is not needed in order to eliminate RF noise.
NOTE: 3.3VDC is only available by installing optional components not included in the kit. TAPR is not stocking these optional parts. You will need to purchase them from your favorite supplier. HPSDR modules currently available do not require 3.3VDC.
(Without optional parts installed)
(With optional 3.3 volt parts installed)
The price for the LPU is:
$ 21 US for members of TAPR
$ 21 US for non-members+ shipping/handling if applicable.
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Shipping and Handling
Shipping and Handling within the US will be by USPS Priority Mail.
International shipping costs are calculated as closely as possible. If the actual cost exceeds the estimate by more than $10.00, TAPR will contact you to get approval for the additional funds. TAPR uses insured Priority Mail International, unless the purchaser requires something else.
Other HPSDR kits
Alex Bandpass filters ... Read more.
Atlas Backplane ... Read more.
Excalibur Reference Oscillator ... Read more.
Janus Audio Converter ... Read more.
Magister USB Interface ... Read more.
Mercury RX Module ... Read more.
Metis Ethernet Interface ... Read more.
Pandora Enclosure ... Read more.
PennyLane TX Module ... Read more.
PennyWhistle PA ... Read more.
Pinocchio Extender Board ... Read more.