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Electronics => Projects, Designs, and Technical Stuff => Topic started by: lordvader88 on March 20, 2018, 09:17:35 pm

Title: What are some meters, test equipment, probes, we can make ourselves ?
Post by: lordvader88 on March 20, 2018, 09:17:35 pm

Like for instance I've made a very simple RF probe, and soon will make a high voltage probe. I've made a few PSUs, soon to be making 3 proper bench PSUs. Later this spring/summer I plan to make a vacuum tube tester.

I don't know the names of all the meters/testers/equipment that could reasonably be made with mostly discrete parts. But that would be fun and useful stuff to make from older schematics.

Title: Re: What are some meters, test equipment, probes, we can make ourselves ?
Post by: CopperCone on March 20, 2018, 09:27:38 pm

near field probes are fun because mostly people don't really care about absolute magnitude accuracy.

You can also make torrodial probes for magnetic field.

Title: Re: What are some meters, test equipment, probes, we can make ourselves ?
Post by: ikrase on March 22, 2018, 07:02:15 am

Directional couplers for measuring power and SWR on VHF and UHF are very easy if you have some diodes, capacitors, copper clad, and a hack saw. (and a steady hand).

Current transformers for AC are also very, very simple. I have heard that you can DIY a DC current detector but it's much more difficult and requires meticulous calibration.

Some people have been building their own electrometers with some success. The trick is having more than one range.