I seem to recall that somebody came up with a replacement chopper for the Fluke 332 calibrator. That might be a good starting point. You can find it if you dig around in the 332 threads on eevblog.
I think one of the biggest problems with replacement technology is the short commercial lifetime of replacement parts. That design, for example, is a few years old and I don't think any of the opamps used are still available.
Similarly, there was a design for the Tektronix U800 that came out of a university that was about 80% functional. Most of those parts are not currently available. Dr. Ram took that work, reworked it so it is a 100% drop in replacement and is selling those on ebay. Kudos to him for that (and disclaimer, I did buy one) but once he decides to quit support that design is lost as well.
I wish we could get something set up so that if people want to make money on a reengineered solution they can, but when they want to drop it (or die) the design info would go open source. Knowing I wouldn't be orphaned again would actually encourage me to buy those solutions.
Paul
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On Mon, Oct 07, 2024 at 10:18:43AM -0700, Harold Foster wrote:
Jared- Your very nice work on the 3400A is what inspired me to start thinking of upgrading various parts of the equipment I have.? I have a few Fluke 343's in the que and I keep hoping someone will jump on the chopper portion - otherwise I'll wind up going down that rabbit hole and I have too many other things (mostly Honey-Do's, sigh) to work on first.
Hal
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Paul Amaranth, GCIH | Manchester MI, USA
Aurora Group of Michigan, LLC | Security, Systems & Software
paul@... | Unix/Linux - We don't do windows
