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Search: Posts Made By: larrymoencurly
Forum: General Electronics Technical Discussion 09-22-2019, 08:40 PM
Replies: 34
Views: 1,159
Posted By larrymoencurly
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...
Forum: General Electronics Technical Discussion 08-13-2019, 02:58 AM
Replies: 9
Views: 512
Posted By larrymoencurly
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,...
Forum: General Electronics Technical Discussion 11-14-2016, 02:05 PM
Replies: 13
Views: 1,891
Posted By larrymoencurly
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...
Forum: General Electronics Technical Discussion 04-25-2016, 09:04 PM
Replies: 5
Views: 1,783
Posted By larrymoencurly
Re: 18v li-ion battery charger. China make it as simple as it get

Is it one that stops immediately when the voltage reaches 4.1V per cell? Because otherwise I don't know a simple charger can charge lithiums.
Forum: Equipment Usage, Soldering, Techniques, and Reviews 11-30-2015, 01:38 AM
Replies: 20
Views: 3,875
Posted By larrymoencurly
Re: Killing multimeters...

Fluke versus Harbor Freight multimeter at high voltage (about 5 minutes in): https://www.youtube.com/watch?v=OEoazQ1zuUM
Forum: General Computer & Tech Discussion 10-03-2015, 04:00 AM
Replies: 23
Views: 7,408
Posted By larrymoencurly
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...
Forum: Equipment Usage, Soldering, Techniques, and Reviews 02-16-2015, 03:23 AM
Replies: 21
Views: 8,324
Posted By larrymoencurly
Re: Hakko vacuum desoldering - Stations vs. Self Contained 808

The vibration of the 808 can sometimes be annoying.
Forum: General Capacitor Questions & Issues 02-16-2015, 02:24 AM
Replies: 19
Views: 14,678
Posted By larrymoencurly
Re: Samsung, Sam Young, Korea, United and Nippon Chemi-Con: who is who?

3 out of 4 Sam Young 1500uF, 6.3V NXC capacitors on an Nvidia 6200 video card failed on me, about 5 years ago. Their date codes may be "79 E(1)" (2007?). The same type of capacitors, maybe in...
Forum: General Computer & Tech Discussion 11-25-2014, 07:50 AM
Replies: 50
Views: 7,074
Posted By larrymoencurly
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.
Forum: Equipment Usage, Soldering, Techniques, and Reviews 11-17-2014, 04:01 AM
Replies: 16
Views: 4,651
Posted By larrymoencurly
Re: what is the correct way solder a coin battery?

I sand the surfaces (about #300 to #400 paper), apply flux, tin them, and then I tin the wires before soldering them to the battery.

Is that a rechargeable battery? My Toshiba A205 (Compal) uses...
Forum: Equipment Usage, Soldering, Techniques, and Reviews 11-07-2014, 12:45 AM
Replies: 86
Views: 28,589
Posted By larrymoencurly
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...
Forum: General Computer & Tech Discussion 08-16-2014, 06:24 PM
Replies: 4
Views: 1,974
Posted By larrymoencurly
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...
Forum: General Computer & Tech Discussion 08-01-2014, 04:40 PM
Replies: 8
Views: 1,996
Posted By larrymoencurly
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...
Forum: Equipment Usage, Soldering, Techniques, and Reviews 08-01-2014, 05:05 AM
Replies: 23
Views: 10,439
Posted By larrymoencurly
Re: The Cen-Tech LE830b 7-function DMM from Harbor Freight Tools

Also the meter leads. I was measuring an AC outlet, and when I pulled out the lead tips, one stayed in the socket, still soldered to its lead, but it's been fine ever since I applied some plastic...
Forum: Troubleshooting Power Supplies and Power Supply Design 07-07-2014, 01:11 AM
Replies: 3,083
Views: 806,971
Posted By larrymoencurly
Re: Power supply build quality pictorial. part 2

It turns out I have a different PSU, a EG-365P-VD, and I can't find any bleeders for the big 680uF, 220V caps in it.
Forum: General Capacitor Questions & Issues 07-07-2014, 12:14 AM
Replies: 26
Views: 6,814
Posted By larrymoencurly
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.
Forum: General Capacitor Questions & Issues 07-07-2014, 12:10 AM
Replies: 25
Views: 5,751
Posted By larrymoencurly
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...
Forum: Troubleshooting Power Supplies and Power Supply Design 07-01-2014, 03:25 AM
Replies: 3,083
Views: 806,971
Posted By larrymoencurly
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...
Forum: Troubleshooting Power Supplies and Power Supply Design 06-30-2014, 10:43 PM
Replies: 40
Views: 9,766
Posted By larrymoencurly
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...
Forum: Troubleshooting Power Supplies and Power Supply Design 06-29-2014, 10:58 AM
Replies: 40
Views: 9,766
Posted By larrymoencurly
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...
Forum: General Computer & Tech Discussion 06-06-2014, 10:25 PM
Replies: 4,456
Views: 685,153
Posted By larrymoencurly
Re: Your Best Dumpster Finds

This guy bought 2 pallets of old NASA space shuttle test equipment for $10:

http://imgur.com/a/YflPy
Forum: All Others Motherboards 05-31-2014, 12:03 AM
Replies: 20
Views: 14,242
Posted By larrymoencurly
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?
Forum: General Capacitor Questions & Issues 04-28-2014, 02:36 AM
Replies: 26
Views: 6,358
Posted By larrymoencurly
Re: Another instance of the shameless Sacon FZ... with a twist!

I thought EVGA had learned its lesson about Sacon FZ caps a few years earlier, when so many of them popped in a year on their FX5200 video cards, especially because EVGA switched those cards to Sam...
Forum: General Capacitor Questions & Issues 04-23-2014, 10:50 PM
Replies: 7
Views: 1,972
Posted By larrymoencurly
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.
Forum: Troubleshooting Power Supplies and Power Supply Design 04-16-2014, 04:33 AM
Replies: 71
Views: 8,898
Posted By larrymoencurly
Re: Found a brand new Comp USA PSU

I think I owned almost the exact same Leadman, only it had two ball bearing fans (one outside the case) and slightly larger heatsinks with no holes on top. At least one of the 1uF or 10uF, 16V or...
Showing results 1 to 25 of 500

 
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