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The great thing about the "human computer" is that we don't need updates!? Maybe a generational re-alignment or two... -Dave

Yes, the DA was a mechanical analog computer. You programmed it with a wrench (and typically a bunch of grad students). If something computes, wouldn't it be odd */not /*to call it a computer? A DA

Is a differential analyzer a form of analog computer? There is a good scene of one operating in the beginning of the film "When Worlds Collide". Other amazing analog computers are the mechanical fire

2465A DMS. Is there a Battery storing calibration data; and Does a record of calibration data need to be made to restore the device if the batter goes flat?

When you think about it, the analogue computer is really a Laplace Transform. EJP

Hey Frank, The -22V supply does have an adjustment, and the 5.2V supply is derived from the -22V supply. It turns out that -20V/-22V*5.2V is ~4.7V, so the low 5.2V supply is likely down to the low

One thing to note about calibrating the sg503. If you are going for the best accuracy you will need the special cable. In general use this is not critical but it can have a 1 to 2% effect on the pk

Curious whether you scoped your 5.2V rail and checked the voltage drop across R624? My 5.2V test point is at 5.2V until things warm up for a minute or two, and then starts wandering from 4.7-4.9 or so

I received some replacement 7490s and now this SG503 is fixed! I had to really sit down and teach myself how the 7490 works. I know what counters do but never really learned how they work. I'm

.... analog computing concepts continue to be of use, ....into the future: In a research article in Science (AAAS) , Feb. 23, 2024 :

I found a parts TDS380 and swapped the option 14 rear panel connectors over to my working TDS380. Nothing else needed to be done - the connections were recognized when I booted. Having the ability

Hi everyone, I have a TDS 380 that I want to use with GPIB for control and plotting. I've given up on locating a TD3F14A kit to do the conversion on my scope. Can I obtain any TDS 310, 320, 330, 340,

Ah, yes! The GE "Project: Analog Computer" kit. I had one of those. It was really just an electrified slide rule, using potentiometers instead of sliding rails. Better was "Project: Shortwave

It is a nice design. I like the compactness of it. I just figured out the Step Gen output and External input "trick" this past week. I wonder if the Tek engineers had this multiplier in mind when

Although it was exceptionally basic, General Electric offered an analog computer science kit in the early 1960s. ?? Bruce Gentry, KA2IVY

Hi Miguel, This is my latest design. It's been something I've wanted to build for my 576 for about a year so I could draw a complete set of characteristic curves for vacuum tubes with a large cutoff

Some years ago there was an analogue computer on eBay being broken up. Consisted of twelve TM506 racks with six AM501s in each. Neat solution. EJP

Agree - I see several things I would be interested in but without pricing I'm just going to move on...

Very cool. I didn't see the Heathkit analog computer on either website, though. DaveD

Not quite so insignificant, at that time: https://www.analogmuseum.org/english/impressions/ https://www.alamy.com/stock-photo/analog-computer.html?sortBy=relevant