HP 1820-0285 Reproduction Pulse Shaper for 8007A and 8007B Pulse Generators

Reproduction pulse shaper IC for the HP 8007A and HP 8007B pulse generators.

Description

Do you have an HP 8007 series pulse generator which no longer produces output? Unfortunately, the problem is likely one of the custom HP pulse shaper ICs, a part which is completely unavailable… That is until now! I have reverse-engineered the original IC and created a modern replacement using surface-mount components on a 4-layer PCB.

Because they use the original HP circuit, these parts function nearly identically to the originals and thus, barring another problem with your instrument, will allow it to easily meet factory specifications and easily pass the performance test printed in the manual. Look at the pictures which compare the positive and negative output pulses of an original part to this reproduction to see for yourself how well these work!

Not only do these parts work equivalently to the originals, they offer another distinct advantage – serviceability. Each unit comes with a service manual including a parts list, component placement diagram and schematic for easy troubleshooting and repair. That said, they use top quality NXP and Vishey parts for long life and come with my standard lifetime guarantee. If the unit ever fails to meet specification, just send it back to me for a free repair.

If you are interested in the story behind the development of these parts, please read my plug post here.

Download the schematic and PCB layout for this product hereNote that these files are available for PERSONAL, NON-COMMERCIAL USE ONLY. In short, you are welcome to use them to build this product yourself, but you must contact me to work out a commission if you wish to sell anything derived from them. This product was designed in ExpressPCB so you will need to download a copy of that software from expresspcb.com before you can view the files. If you want to view the simulations you will also need LTSPICE which can be found at http://www.linear.com/designtools/software/.

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