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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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11th Jan 2019, 5:05 pm | #21 |
Heptode
Join Date: Jul 2010
Location: Wellington, New Zealand.
Posts: 653
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Re: ESR Meters.
My thanks to both David and Mark for their posts - most enlightening.
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12th Jan 2019, 12:47 am | #22 |
Dekatron
Join Date: Jan 2003
Location: Bradford on Avon, Wiltshire, UK.
Posts: 3,310
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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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12th Jan 2019, 4:03 am | #23 | |
Octode
Join Date: Oct 2003
Location: Newbury, Berkshire, UK.
Posts: 1,770
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Re: ESR Meters.
Quote:
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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Chris |
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12th Jan 2019, 4:08 pm | #24 |
Heptode
Join Date: Mar 2009
Location: Portsmouth, Hampshire, UK.
Posts: 674
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Re: ESR Meters.
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12th Jan 2019, 4:28 pm | #25 |
Nonode
Join Date: May 2007
Location: Redruth, Cornwall, UK.
Posts: 2,579
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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. Regards Symon. |
13th Jan 2019, 9:20 pm | #26 |
Banned
Join Date: Feb 2018
Location: Horncastle, Lincolnshire, UK.
Posts: 203
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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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13th Jan 2019, 10:12 pm | #27 |
Dekatron
Join Date: Apr 2009
Location: Oxfordshire, UK.
Posts: 4,935
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Re: ESR Meters.
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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13th Jan 2019, 10:30 pm | #28 | |
Octode
Join Date: Oct 2003
Location: Newbury, Berkshire, UK.
Posts: 1,770
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Re: ESR Meters.
Quote:
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Chris |
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4th May 2019, 8:18 am | #29 |
Pentode
Join Date: Jun 2009
Location: Leominster, Herefordshire, UK.
Posts: 246
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Re: ESR Meters.
After reading this thread and finding it most useful and interesting ( apart from the fact I'm borrowing an ESR more often than I feel comfortable with ) , I have opted for the Peak, should be here next week.
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4th May 2019, 9:43 am | #30 |
Dekatron
Join Date: Aug 2007
Location: W.Butterwick, near Doncaster UK.
Posts: 8,935
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Re: ESR Meters.
You will not go wrong with the Peak.
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4th May 2019, 3:00 pm | #31 |
Nonode
Join Date: Mar 2008
Location: Virginia Water, Surrey, UK.
Posts: 2,877
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Re: ESR Meters.
The "Eureka Moment" for me was over 12+ years ago when I was trying to faultfind a switchmode power supply on a Philips scope which was giving a very fizzy trace. I HATE switchmodes!
Michael Maurice offered to let me come over and he would show me what an ESR meter can do. A few minutes of in-circuit ESR testing and the faulty caps were clearly identified. There were so many that he suggested a complete re-cap, which I did, and the scope sprang back to life. Since then I have always used an ESR meter on electrolytic caps involved in power-related faults. And yes, I decided to treat myself to a Peak Electronics one. I damaged one test lead (cut through in error), and Peak volunteered to send me a new lead set foc. Now that's service!
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