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Hewlett Packard 6651A System DC Power Supply 0-8V 0-50A 120V Input - Parts

Current Stock:

Product Description

Manufacturer: Hewlett Packard HP

Model: 6651A

Condition: For Parts or Not Working. This supply is in Fair cosmetic condition.  The left side of the front panel is broken.  We installed a few extra screws to try to hold it, but the plastic frame of the front panel is broken so it still wiggles quite a lot when pulled.  The voltage knob was able to be pushed in, so we opened the front panel and found two broken plastic retaining clips for the circuit board.  We inserted a couple of screws to hold the board near one of the former clips, so it at least isn't flopping inwardly when the voltage knob is pushed a little.  There are also heavy scuffs and scratches all over, and a bit of the right corner of the face plate is broken off.  The plastic clips to hold the handles are also broken.
The photos show the exact item(s) the buyer will receive.

Notes: This power supply is in PARTIALLY-working condition.  We verified it gives a voltage output that matches our reference meter pretty well.  The problem is that the current is not steady.  We found the output current changes pretty quickly about +/-0.2A.  The button controls respond as expected to user inputs.  The voltage knob feels a little rough when turned, but both voltage and current knobs produced steady changes when rotated.  The display is clear and easy to read.  No other testing was done.
No manuals, cords/cables, or additional items are included if not listed or shown.


  • (1) HP 6651A System DC Power Supply


  • Manufacturer: Hewlett Packard
  • Model: 6651A
  • System DC Power Supply
  • Output: 0 to 8VDC, 0 to 50A
  • Input: 120V 50/60Hz 1380VA
  • Real-time digital current and voltage meters
  • Knobs, buttons, or programmable voltage and current
  • Over-voltage, Over-current and Over-temperature protected
  • Local or remote sensing
  • HP-IB communications
  • Rear panel screw terminal output

Tested to full rated voltage and current, output current a little unsteady.


  • No returns - No refunds - No exchanges
  • By purchasing this item, you are agreeing to not seek reimbursement should the item not function to the manufacturer's specifications.
  • Read the notes carefully to ensure you are buying something you can use
  • See complete terms

CDN Systems LLC, DBA Doug Deals, is not an authorized distributor or affiliated with the manufacturer of this product. Original manufacturer's warranty does not apply.

Other Details

For Parts or Not Working

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