Close
0%
0%

HP1142A to 1143 probe power supply

Add HP 1143A functionality to HP1142A probe power supply

Similar projects worth following
112 views
0 followers
Some HP/Agilent probes such as HP54701A are not compatible with the old HP1142A power supply. Instead the 9 pin DIN connector they are using 7 pin Lemo, and there are slight difference how the offset is implemented.
Unlike HP1142A the HP1143A is hard to find and when found the price tag is usually way to high, all units i found are above $600.
This project is add-on to the HP1142A power supply adding the HP1143 functionality.

This project is add-on to the HP1142A power supply adding the HP1143 functionality. The main difference between both units are :
- HP1142A provide +/-15 and +/- 6 V when HP1143A provide +/- 17.3 V
- HP1142A offset is voltage based, where the HP1143A offset is current based +/- 5 mA
- HP1142A has separate signal and power grounds and in HP1143A we have only one

The PCB fit over the existing HP1142 PCB seating on 4 spacers. Attached photos showing where are the 5 connection to the HP1142A board.


The board on the photos is my first version. Here i am uploading revision 2, where i add a differential amplifier to deal with the potential difference between analog and power ground in the HP1142 and also add a trimer allowing the HP1143 offset to be set to 0 independently.

The HP1142A rectifier provide +/- 32 V, and voltage drop on the LM3x7 is significant. With the current design the temperature on the chip is around 70 C far from the max specified 125 but adding a small heatsink may be beneficial. 

HP1142-1143 CAM.rar

RAR Archive - 5.18 MB - 02/14/2025 at 03:55

Download

HP1142-1143 CAD.rar

RAR Archive - 1.14 MB - 02/14/2025 at 03:55

Download

HP1142-1143 Gerbers.zip

x-zip-compressed - 100.96 kB - 02/14/2025 at 03:55

Download

1141AUSerService.pdf

Adobe Portable Document Format - 10.10 MB - 02/14/2025 at 01:36

Preview

Alltest-HP-Agilent-Keysight-1143A-Manual.pdf

Adobe Portable Document Format - 1.64 MB - 02/14/2025 at 01:34

Preview

View all 8 files

View project log

Enjoy this project?

Share

Discussions

Similar Projects

Does this project spark your interest?

Become a member to follow this project and never miss any updates