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| Show the homemade equipment you are using now. |
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| MathWizard:
--- Quote from: ccktek on November 02, 2022, 07:16:14 pm ---(Stretching the meaning of “using now” a little.) Upper photo: BC band generator (1959) Oscilloscope (1961) Variable AC and +/-DC power supply (1973) on top of 1.3GHz generator (1976) Oscilloscope (1976) Sound level meter (1980) Lower photo: Trombone air flow meter (2019) on top of 4-output power supply (1988) Fast square wave pulser adapter (2017) on top of Focal plane shutter tester (1997) on top of Wow and flutter meter (1998) and Low distortion audio generator (2019) Semiconductor curve tracer (2021) --- End quote --- Hey ccktek, seems you've been at this while LOL. What sort of curve tracer did you make in 2021 ? |
| ccktek:
MathWizard, thanks for your correct observation and inquiry. https://www.eevblog.com/forum/projects/self-contained-semiconductor-curve-tracer/msg3551423/#msg3551423 |
| Zero999:
A dual tracking +/-15V LM317 & LM337 power supply. I've just noticed there should be a centre tap on the transformer in the schematic, but otherwise it's correct. |
| MathWizard:
--- Quote from: ccktek on January 19, 2023, 10:29:02 pm ---MathWizard, thanks for your correct observation and inquiry. https://www.eevblog.com/forum/projects/self-contained-semiconductor-curve-tracer/msg3551423/#msg3551423 --- End quote --- Yeah it looks interesting. I've have a couple of old transformers lying around that I plan to use in a real CT. I've made a few little circuits on proto-board over the past few years, that are like my home-made tool box. Like an H-bridge tester for small motors, a TRIAC/SCR tester, an 11M resistor box, a wire tracer/ finder, a RF probe/signal tracer, resistive load testers on boards, etc. I built a copy of an old linear 30V, 1A PSU. Now that I have a bit of money, I need to start making better stuff. Like a better op-amp controlled PSU, a 1/2 way decent curve tracer, and modular high power, high current load tester for some computer PSU's. I need to start looking locally for good transformers and heat sinks. Otherwise I'd have built some better by now along those lines. But I really want to learn some more theory, so I don't just copy exactly another design. But I would try to copy some older stuff like Heathkit. |
| inse:
@ MrYakimovYA #36 Reply Do you need special connectors and cables to handle 100GOhms without compromising the measurements? |
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