Re: HP 3325A - Help with photos of Option 002 PCB?
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Hi,
I was recently thinking about the same for my 3325B, but ended up buying a non working 3325A with the option and just transplanted the option. This has the advantage that you get all the accessories, like connecting signal cables and power cable that are otherwise needed if you roll your own board. I was looking into the possibility of either replicating the original design, there are no special parts there, with maybe of the exception of a dual transistor. Or creating a new design with modern high voltage opamps, which is also not trivial. On the original Opt002 I? measured about 3,5MHz 3db bandwidth, which there are high voltage opamps with this bandwidth, but the slew rate is not sufficient to go for 40V. Of course this is solvable, but I have not yet investigated further. But if you can wait a couple of days, I can make you detailed photos of the original option module, just need to disassemble the 3325B for that.
Szabolcs
Jared Cabot < jaredcabot@...> ezt ¨ªrta (id?pont: 2019. ¨¢pr. 4., Cs, 11:16):
Hi,
I have just recently picked up a working 3325A Function Generator, and am thinking about building my own Option 002 board (High Voltage output board) to give me 40v output capability.
I had good success building a DC Bias Option 001 board for my 4276A LCZ meter that works great, so I am feeling a little confident I can build my own option board a second time. :D
Does anyone have one of these 3325A machines with the option that they could take a photo of each side of the option board and a photo of how it is connected inside the unit?
That way I can somewhat match the HP design and then connect it properly once it's done.
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Any help would be greatly appreciated!
Thanks!
Jared
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