开云体育

I have a 2430A that is just starting to occasionally fail the FPP battery test at power on. It is a later serial number that does not have the large lithium battery, but has the two Dallas NVRAM

Gianni did provide the PDF for free. That must be what you're thinking of. I would rather have a paper copy - great coffee table book for scope geeks.

Hi Steve, Those both slipped in under my radar. Thanks for the links. I've never seen an EAI 180 before. Interesting machine! Too bad they're both too far away. I'm open to shipping things, but I

Hmmmm...? Wikipedia doesn't answer the big question (at least for me): Why was it called the Millionaire?? ?Fascinating history nonetheless.? ?Thanks for posting the links.? ? ? ? ?

All those new-fangled things are for the weak-kneed !! Back in my day we used the "Millionaire

I remember the (Smith-Corona) Marchant mechanical calculator, about the size of a typewriter (remember those?) that my dad had in the chemistry lab back in the 1970s. He also had a Monroe electronic

Ok, if the output of the character generator at the x and y inputs to the deflection boards is ok, and you see no distortion, then the source of the distortion is likely either a mismatch between the

I finally go around to trying the XY display. It works quite well. As for the stretching characters, I don't see any of that; however, I'm waiting to get the replacement IC for the vertical board to

Thanks Mark, I hope my story helps others. It would be a shame to junk a nice 'scope for the sake of a 10c resistor. Peter wrote:

Peter, Glad to hear you fixed it. I had wondered about that resistor. Knowing it has 140V across it, I will note that in case mine gives the same trouble then change to a 1/2W. Mark

My last message did not display well using copy and paste but the information is there. To summarize and answer my own questions. The problem appears to have been an intermittent R1031 which was

Christian, Any chance that you could post some pictures of sliding out the drawer? I’m also curious to hear what your gray encoder solution is. Currently suffering with that issue on my 370.

Does anyone have experience with calibrating the CTT? What did you use for a pulse generator? *Check the U1030 circuits* · Circuit operation: An output voltage is fed through high

Looks like I may have put too little voltage in. From 43 - 48V, the circuit outputs 8.56V, so it is in regulation. The current is 900 mA. Unfortunately, I still can't run it of the wall outlet (the

If you have access to a lathe it's a trivial task to make up a spacer that allows modern button cells to be used in place of those obsolete thicker ones (that possibly contained mercury). I have done

Chris, There is a TR-20 on eBay - for USD

I just missed out on a fully loaded EAI Pace TR-20 a few years ago. I'm happy/sad about that. They aren't light and they aren't small! I hesistated on shipping cross country. At the time they

With analog computing, it's not a revival of the classical analog computer. We're at the cradle of something totally new coming up.

Try running up the external supply to a higher level. It's not precise. If it runs and ultimately regulates according to closed-loop conditions, it should be good to go. You know now how to tell if

I got the TIP41C transistors and I swapped them in. The power supply no longer oscillates at 1MHz, but the -8.6V rail is at -8.2V when I feed in 42V, and that's with the potentiometer turned all the