FS [EU]: Keithley 228 Constant voltage/current source 100V/10A (SOLD) - Page 1
Forum section: electronics / general

author: manganin
author_rank: Regular Contributor
timestamp: October 24, 2022, 03:43:29 pm
content: An older Keithley "source meter" with 0-100V or 0-10A capabilities.I promised my wife to sell an instrument per month. This could be the next one.If anyone is looking for a Keithley 228 or wants to to see the internals, please let me know and I will take this as my next project.Powers up without errors. Tested and possibly calibrated before it was put in storage 10 years ago, so good chances it works just fine.Manual:https://xdevs.com/doc/Keithley/228/228_901_01C.pdf

author: jogri
author_rank: Frequent Contributor
timestamp: October 24, 2022, 05:21:53 pm
content: Price?

author: manganin
author_rank: Regular Contributor
timestamp: October 24, 2022, 06:00:42 pm
content: Quote from: jogri on October 24, 2022, 05:21:53 pmMaybe 225 euros? If it turns out to be functional.But I will first take photos and do some tests. Just to make sure that I know what I am selling and the potential buyers know what they are buying.

author: alm
author_rank: Super Contributor
timestamp: October 24, 2022, 06:06:45 pm
content: I have one of these, so I'm not on the market, but I think it's a quite interesting device. Basically a high power SMU up to 10V / 10A or 100V / 1A with resolution down to 1 mV / 100 uA. It's clunky, but it is a proper four quadrant source. Useful for tracing power semi-conductors, or even as active load.

author: modz786
author_rank: Regular Contributor
timestamp: October 24, 2022, 06:17:32 pm
content: ide rather sell a wife each month than an instrumentlooks interesting and wonder if it travels well in shipping

author: manganin
author_rank: Regular Contributor
timestamp: October 24, 2022, 07:11:52 pm
content: Quote from: modz786 on October 24, 2022, 06:17:32 pmI guess I have better wife or worse test equipment than you. And to be honest this was originally my idea (or she is a jedi master).Quote from: modz786 on October 24, 2022, 06:17:32 pmIt is not super heavy and the chassis is very rigid.

author: manganin
author_rank: Regular Contributor
timestamp: October 24, 2022, 08:13:15 pm
content: This is reserved even though not tested yet. That was fast.

author: manganin
author_rank: Regular Contributor
timestamp: October 25, 2022, 12:24:40 pm
content: Dust and sticker residue.Seems to be well within specs.

author: alm
author_rank: Super Contributor
timestamp: October 25, 2022, 05:20:25 pm
content: Nice modification with the banana jacks on the back! Does not look original, but looks very convenient! Do the wires connect to a small pcb inserted in the edge connector, or are they soldered to the edge connector?Either way it looks much more convenient than the standard board with a screw terminals.

author: manganin
author_rank: Regular Contributor
timestamp: October 26, 2022, 08:40:07 am
content: Yes, there is a small PCB hidden under the support bar. The new panel doesn't require any changes to the intrument and can be removed at any time. Even the original mounting screws were long enough.Can't take photos anymore, the unit was already packed at the time of your message. But I may have the mechanical drawings somewhere.

author: manganin
author_rank: Regular Contributor
timestamp: October 27, 2022, 08:56:51 am
content: Shipped to Germany.