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Vintage Test Gear and Workshop Equipment For discussions about vintage test gear and workshop equipment such as coil winders.

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Old 11th Jan 2019, 5:05 pm   #21
avocollector
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Default Re: ESR Meters.

My thanks to both David and Mark for their posts - most enlightening.
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Old 12th Jan 2019, 12:47 am   #22
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Default Re: ESR Meters.

Given the prices of them in the above thread, I'm even keener to build one! I have all the bits and instructions/ circuit. Now all I need is the time!
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Old 12th Jan 2019, 4:03 am   #23
evingar
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Default Re: ESR Meters.

Quote:
Originally Posted by Argus25 View Post
The best ESR meter I have ever used was the one designed by Bob Parker. I have the kitset version of it made by Silicon Chip, available from Altronics with a lovely black housing and Red LED's, but they come in other forms:
Another vote for the Bob Parker design here
I have 2 meters, both built from kits, an older Anatec "blue" and one from a chap in Portugal (EVB).

http://clientes.netvisao.pt/greenpal/evb1.htm

Both versions seem very well protected from applied voltage, judging from the daft things I've done to both. It's nice to have a circuit diagram for both. The only thing that isn't an off the shelf part is the programmed uP.
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Old 12th Jan 2019, 4:08 pm   #24
jimmc101
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Default Re: ESR Meters.

A varied collection of homebrew ESR meter circuits is available on kripton2035's site

Jim
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Old 12th Jan 2019, 4:28 pm   #25
Philips210
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Default Re: ESR Meters.

Hi.

I built a very useful ESR meter from TELEVISION magazine. The project was by Alan Willcox and the articles can be found here https://www.vintage-radio.net/forum/...ad.php?t=93523 post#5 thanks to member KeithsTV.

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Old 13th Jan 2019, 9:20 pm   #26
M3VUV51
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Default Re: ESR Meters.

look at my homebrew one from p diddy at eev blogg,also the chinese esr meters use a too high voltage to test in circuithttps://www.eevblog.com/forum/projects/5-transistor-esr-meter-design/200/
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Old 13th Jan 2019, 10:12 pm   #27
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Default Re: ESR Meters.

Quote:
Originally Posted by M3VUV51 View Post
look at my homebrew one from p diddy at eev blogg,also the chinese esr meters use a too high voltage to test in circuithttps://www.eevblog.com/forum/projects/5-transistor-esr-meter-design/200/
Are you saying that someone has tested all of the "chinese esr meters" and established that they all work on too high a voltage to use 'In-circuit', or is that just a sweeping generalisation? The point has to be stressed here that if you buy a tester for the lowest price on the market, you would be foolish to think it is likely to perform as well as something costing appreciably more.

I think that the issue of testing the ESR of capacitors 'in circuit' is regarded by some people as a bit of a grey area, and there is some possibility of getting a false reading even when low voltage tester is being used.

B
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Old 13th Jan 2019, 10:30 pm   #28
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Default Re: ESR Meters.

Quote:
I think that the issue of testing the ESR of capacitors 'in circuit' is regarded by some people as a bit of a grey area, and there is some possibility of getting a false reading even when low voltage tester is being used.
I think you have to use your head a bit and work out what's in parallel. Measuring caps in circuit has saved me a lot of time when repairing SMPSU's.
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