Forum: Troubleshooting Game Consoles & Other Weird Devices
06-10-2020, 12:54 AM
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Replies: 25
Views: 3,731
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Forum: General Electronics Technical Discussion
09-22-2019, 08:40 PM
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Replies: 34
Views: 3,404
Re: Matching output transistors on an audio amp?
The Harbor Freight multimeters they often give out free with the right coupon and any purchase have a transistor hFE tester, but I don't know how well it works for matching transistors.
Here's...
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Forum: General Electronics Technical Discussion
08-13-2019, 02:58 AM
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Replies: 55
Views: 4,277
Re: TO-220 exploded...estimated overload?
I once had a triac inside a Woods brand plug-in ground fault interrupter explode and left a nice copper plating inside the case, over a 3/4" diameter area. It turned out there was a recall on it,...
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Forum: General Electronics Technical Discussion
11-14-2016, 02:05 PM
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Replies: 13
Views: 2,633
Re: Old National IC ???
Here's a datasheet for a National MM53200 garage door chip, also 18 pins:
http://www.istitutoprimolevi.gov.it/elettrobox/Datasheet_MM53200%20Encode-Decoder.pdf
Notice the same chip is used...
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Forum: General Electronics Technical Discussion
04-25-2016, 09:04 PM
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Replies: 5
Views: 2,414
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Forum: Equipment Usage, Soldering, Techniques, and Reviews
11-30-2015, 01:38 AM
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Replies: 20
Views: 4,842
Re: Killing multimeters...
Fluke versus Harbor Freight multimeter at high voltage (about 5 minutes in): https://www.youtube.com/watch?v=OEoazQ1zuUM
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Forum: General Computer & Tech Discussion
10-03-2015, 04:00 AM
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Replies: 23
Views: 8,881
Re: Your favorite “quick-fix” fastening materials
Provided it hasn't expired. I once bought a roll of 3M trim tape from an electronics surplus store and used it for a car's side molding, and once the weather hit 110F, the molding fell off. Changed...
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Forum: Equipment Usage, Soldering, Techniques, and Reviews
02-16-2015, 03:23 AM
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Replies: 21
Views: 9,512
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Forum: General Capacitor Questions & Issues
02-16-2015, 02:24 AM
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Replies: 19
Views: 17,878
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Forum: General Computer & Tech Discussion
11-25-2014, 07:50 AM
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Replies: 50
Views: 8,964
Re: Another HDD issue
The MHDD diagnostic that RJARRRPCGP mentioned will let you specify the LBAs of the first and last sectors you want tested. I don't know if a different diagnostic, HDAT2, allows that.
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Forum: Equipment Usage, Soldering, Techniques, and Reviews
11-17-2014, 04:01 AM
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Replies: 16
Views: 6,211
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Forum: Equipment Usage, Soldering, Techniques, and Reviews
11-07-2014, 12:45 AM
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Replies: 86
Views: 32,348
Re: This is why you don't buy cheap multimeters.
When I get a free Harbor Freight multimeter, I've always picked a model #98099 (yellow on/off switch), but last time I instead got a model #98025 (red on/off switch). When I opened it I thought it...
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Forum: General Computer & Tech Discussion
08-16-2014, 06:24 PM
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Replies: 4
Views: 2,768
Re: Does single sided RAM alwas = high density?
I don't think it's just the density that matters but the number of address lines used because around 2000, Fry's had a special on 80GB Maxtor hard drives for $50, after rebate, and a 256MB memory...
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Forum: BIOS & Schematic Requests!
08-01-2014, 04:40 PM
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Replies: 8
Views: 2,688
Re: Bad bios flash need help
If the Zotac motherboard has a socket for a video card, try that because when my MSI MS-7309 ver. 2.3 flash failed, I saw nothing from its built-in video, but a PCI video card showed some error...
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Forum: Equipment Usage, Soldering, Techniques, and Reviews
08-01-2014, 05:05 AM
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Replies: 23
Views: 12,634
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Forum: Troubleshooting Power Supplies and Power Supply Design
07-07-2014, 01:11 AM
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Replies: 3,194
Views: 1,039,802
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Forum: General Capacitor Questions & Issues
07-07-2014, 12:14 AM
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Replies: 26
Views: 8,334
Re: 2200uf 10v cap replace with 6.3v?
Are Sanyos more vulnerable to that than other brands? Because I replaced a bulging 10V, 2200uF Koshin brand cap with a 10V, 2200uF Sanyo, and 2 years later it bulged.
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Forum: General Capacitor Questions & Issues
07-07-2014, 12:10 AM
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Replies: 25
Views: 7,426
Re: Soldering question
I'd chop the capacitor off on the top side so the pins can be separated from one another and the stubborn pin gently and carefully pulled out after blobbing some more solder over its hole.
How...
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Forum: Troubleshooting Power Supplies and Power Supply Design
07-01-2014, 03:25 AM
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Replies: 3,194
Views: 1,039,802
Re: Power supply build quality pictorial. part 2
I have the same PSU with the same capacitors, also none bulging. It also has no bleeder resistors in the high voltage section, so even if I unplug it overnight, pressing the power button makes the...
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Forum: Troubleshooting Power Supplies and Power Supply Design
06-30-2014, 10:43 PM
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Replies: 40
Views: 11,811
Re: Can a PSU damage the motherboard capacitors?
I don't know how long the overvoltage lasted, but the LEDs of the USB mouse glowed normally (decorative blue one remained steady, red LED for the motion detector dimmed when not used and brightened...
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Forum: Troubleshooting Power Supplies and Power Supply Design
06-29-2014, 10:58 AM
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Replies: 40
Views: 11,811
Re: Can a PSU damage the motherboard capacitors?
An Antec 350W SmartPower's +5Vstandby circuit failed and fed 13V to the motherboard. The USB ports and everything plugged into them all seemed OK, but a USB mouse blew and the built-in Realtek sound...
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Forum: General Computer & Tech Discussion
06-06-2014, 10:25 PM
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Replies: 5,394
Views: 1,055,084
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Forum: Troubleshooting Desktop Motherboards, Graphics Cards, and PC Peripherals
05-31-2014, 12:03 AM
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Replies: 20
Views: 16,826
Re: How to: CPU Socket Reflow
Would it help to remove the plastic on the top side of the CPU socket so more heat can transfer from the pins to the solder bumps?
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Forum: General Capacitor Questions & Issues
04-28-2014, 02:36 AM
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Replies: 26
Views: 8,148
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Forum: General Capacitor Questions & Issues
04-23-2014, 10:50 PM
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Replies: 7
Views: 2,570
Re: First shot at MB recap. Ugh!
I once found regular non-corrosive rosin flux in the plumbing dept. of Home Depot. It was cheaper than local electronics supplies.
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