Forum: General Electronics Technical Discussion
Yesterday, 06:42 PM
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Replies: 15
Views: 156
Re: Help me with capacitors replacement
I would say it's a crappy soft-start circuit, the big resistor gets bypassed by the triac once the main filter caps are charged up, after the delay.
The board does not look repairable - the bridge...
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Forum: Troubleshooting Audio Equipment
Yesterday, 11:06 AM
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Replies: 2
Views: 59
Re: AU101 Sansui amp schematic please
I find many old grey Elna electrolytics pretty much dead nowadays, they dry out and go low value. I'd replace them all.
You can compare DCV readings between channels. Two transistors are the phono...
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Forum: Troubleshooting Audio Equipment
08-11-2022, 11:07 PM
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Replies: 2
Views: 81
Re: Recapping a Cerwin Vega Crossover help
I see a 1.5uF 200VDC and 3.5uF film capacitors, and another small one underneath, and some others as well.
Those caps look fine and if they test reasonable, I would leave them alone. If they were...
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Forum: General Electronics Technical Discussion
08-11-2022, 03:08 PM
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Replies: 13
Views: 269
Re: Converting +/- 5v to a Usable Hz Signal
I see the wheel has already been invented. There are many aftermarket fan controllers for cars:
Summit Racing (https://www.summitracing.com/search/part-type/fan-switches) has several different makes...
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Forum: Announcements & Related News
08-10-2022, 04:52 PM
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Replies: 4
Views: 1,287
Re: Panasonic exits VRLA market
Panasonic VRLA were top quality, end of an era. There's nothing left but cheap chinese VRLA with not even 1/2 the lifetime. Just look inside, the lead plates look like they were made by kids, all...
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Forum: General Capacitor Questions & Issues
08-10-2022, 04:37 PM
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Replies: 29
Views: 756
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Forum: General Capacitor Questions & Issues
08-10-2022, 04:33 PM
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Replies: 13
Views: 417
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Forum: Troubleshooting & Designing Networks
08-10-2022, 03:11 PM
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Replies: 22
Views: 441
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Forum: General Electronics Technical Discussion
08-10-2022, 02:52 PM
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Replies: 13
Views: 269
Re: Converting +/- 5v to a Usable Hz Signal
You can reverse-engineer what is needed with not so much work. It's kind of two parts - knowing the engine temperature, and controlling the fan(s).
I have a peer who does ECU design and will ask...
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Forum: General Electronics Technical Discussion
08-09-2022, 01:35 PM
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Replies: 13
Views: 269
Re: Converting +/- 5v to a Usable Hz Signal
If I understand you, you want to add a variable speed feature to the older generation ECU on/off fan control?
Most cars use simple on/off control with a relay for the cooling fan(s). In stopped...
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Forum: Troubleshooting & Designing Networks
08-08-2022, 01:08 PM
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Replies: 22
Views: 441
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Forum: General Electronics Technical Discussion
08-07-2022, 06:20 PM
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Replies: 63
Views: 1,296
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Forum: General Electronics Technical Discussion
08-06-2022, 12:43 PM
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Replies: 63
Views: 1,296
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Forum: General Electronics Technical Discussion
08-05-2022, 10:48 PM
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Replies: 63
Views: 1,296
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Forum: Troubleshooting & Designing Networks
08-05-2022, 02:32 PM
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Replies: 22
Views: 441
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Forum: General Electronics Technical Discussion
08-05-2022, 02:28 PM
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Replies: 63
Views: 1,296
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Forum: General Capacitor Questions & Issues
08-05-2022, 11:54 AM
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Replies: 29
Views: 756
Re: Blown cap on old dwell gauge - kal equip 2851
The old burnt resistor was GREY-RED for the first two stripes, so it's 82 something something, either 8.2Ω or 82Ω yet you measure 5.0Ω on the burnt part. Hmmm.
I would put in 82Ω and see how it...
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Forum: Troubleshooting & Designing Networks
08-05-2022, 10:16 AM
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Replies: 22
Views: 441
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Forum: General Electronics Technical Discussion
08-05-2022, 09:49 AM
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Replies: 63
Views: 1,296
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Forum: Troubleshooting & Designing Networks
08-04-2022, 01:36 PM
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Replies: 22
Views: 441
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Forum: General Electronics Technical Discussion
08-03-2022, 12:41 PM
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Replies: 63
Views: 1,296
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Forum: General Capacitor Questions & Issues
08-02-2022, 11:30 PM
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Replies: 3
Views: 118
Re: this look defective to you?
SamXon? :spank: It does look a little prego but some circuits won't provide enough power for a bad cap to really gas up and go really plump. I'd test it and outright replace that lousy brand anyhow.
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Forum: General Electronics Technical Discussion
08-02-2022, 11:26 PM
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Replies: 63
Views: 1,296
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Forum: General Electronics Technical Discussion
07-29-2022, 03:56 PM
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Replies: 63
Views: 1,296
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