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Search: Posts Made By: kc8adu
Forum: General Capacitor Questions & Issues 02-28-2022, 03:46 PM
Replies: 1,015
Views: 532,338
Posted By kc8adu
Re: The Hall of Shame - Badcaps Photo Montage

Motorola quantar repeater supplies burn up just like that.
And its leaking electrolyte that set it off.
I recap them on sight.
Just did one for a uhf p25 system i am putting on the air.
Forum: General Computer & Tech Discussion 02-28-2022, 03:30 PM
Replies: 5
Views: 546
Posted By kc8adu
Re: UPS issue

Random noname chinese/vietnamese agms are good for no more than 2 years if you are lucky.
I pick good quality metal units and run with external truck batteries.
Hours of backup rather than minutes.
Forum: General Capacitor Questions & Issues 02-28-2022, 03:12 PM
Replies: 1
Views: 536
Posted By kc8adu
rubycon mh series [email protected] 10x12mm.old or fake?

All the mh mh5 mh7 ect are subminiatures with no [email protected]
Ancient or fake?
Found in the power supply of my logical devices chipmaster 6000
Compare to a mbz i had handy
Forum: General Capacitor Questions & Issues 07-04-2021, 06:58 PM
Replies: 6
Views: 2,275
Posted By kc8adu
Re: Callins capacitor?

those are always shot in anything i see them in.
just had a zenith trans oceanic where 1 was so leaky it exploded when the customer put in a set of charged nicads.
i suspect that epoxy seal cracked...
Forum: Troubleshooting Computer Displays 02-15-2020, 03:26 PM
Replies: 23
Views: 3,194
Posted By kc8adu
Re: Dell P2412h LED monitor shows pink tint in white screens

i almost forgot.
pull the lvds and power up.
is the screen now white?
or is it pink?
white means the backlight color is ok.
Forum: Troubleshooting Computer Displays 02-15-2020, 03:16 PM
Replies: 23
Views: 3,194
Posted By kc8adu
Re: Dell P2412h LED monitor shows pink tint in white screens

look at the light shining through the translucent parts of the panel back.
or through holes.
normally led backlights look like daylight fluorescents or 6500-8000k.
i had a 24" samsung with the...
Forum: BIOS Requests ONLY! 02-08-2020, 05:26 PM
Replies: 1,321
Views: 41,104
Posted By kc8adu
Re: HP BIOS unlock tool

looks like the .rar got corrupted.
Forum: Troubleshooting Audio Equipment 02-08-2020, 05:04 PM
Replies: 13
Views: 4,180
Posted By kc8adu
Re: Dewalt DC012 Shop Radio no Sound

shorted caps near the amp chip
Forum: General Capacitor Questions & Issues 02-08-2020, 03:54 PM
Replies: 83
Views: 16,340
Posted By kc8adu
Re: Panasonic FC series - leaking? quality gone?

note that they lasted over 87000 hours.
thats continuous.
sounded worse than it was.
but leaking and corroding unused parts?
not good!
Forum: General Capacitor Questions & Issues 02-08-2020, 09:10 AM
Replies: 83
Views: 16,340
Posted By kc8adu
Re: Panasonic FC series - leaking? quality gone?

had a power supply for an apple 2e i repaired 10 years ago come back to me .
all the fc were leaking from the bung.
unit runs 24/7/365 and cool.
this is not good!
Forum: General Computer & Tech Discussion 05-14-2019, 07:12 AM
Replies: 33
Views: 2,863
Posted By kc8adu
Re: Computer jobs that are like kicking yourself in nuts.

its the old vista "upgrade".
which consisted of digging xp drivers for stuff that supported it but was intentionally not supported by the mfr of the system.
no doubt a kickback scheme from...
Forum: General Capacitor Questions & Issues 05-14-2019, 06:27 AM
Replies: 10
Views: 1,682
Posted By kc8adu
Re: Razer Naga Mouse Keys Working but no Movement

its likely a bad optical sensor.
with luck its just the led but many nowadays are integrated.
razer stuff tends to be cheaply built and unreliable so no surprise.
i just replaced switches on a 6...
Forum: Equipment Usage, Soldering, Techniques, and Reviews 05-07-2019, 06:32 AM
Replies: 12
Views: 2,013
Posted By kc8adu
Re: [emission only] vacuum tube tester safety

this set must have been missing its isolation hardware.
not unusual for these parts to have degraded in the last 70+ years and replaced with metal parts by someone who did not understand why the...
Forum: Equipment Usage, Soldering, Techniques, and Reviews 05-06-2019, 06:15 PM
Replies: 32
Views: 5,085
Posted By kc8adu
Re: Cordless Soldering Iron - recommendations?

btw a iso-tip with a high drain 21700 li-ion and a tp4056 board works great.
i also replace bulb with a white led and resistor in the bulb base.
the yellow package high efficiency tips work best....
Forum: Equipment Usage, Soldering, Techniques, and Reviews 05-06-2019, 05:53 PM
Replies: 32
Views: 5,085
Posted By kc8adu
Re: Cordless Soldering Iron - recommendations?

you are wasting your time with cells at 0 v.
anything much below 2v are usually not much good.
0v cells also carry a risk of dendrite shorts.
but the good news is that these cells are usually in...
Forum: General Electronics Technical Discussion 05-06-2019, 07:13 AM
Replies: 49
Views: 2,995
Posted By kc8adu
Re: LED Circuit Aluminum Base

looks like you have at least 1 led bad on each board.
i would replace all leds with ones from a major brand.
and this gives you the opportunity to select color temp and cri.
the issue is that 1...
Forum: General Computer & Tech Discussion 05-06-2019, 06:49 AM
Replies: 49
Views: 5,620
Posted By kc8adu
Re: I'm getting windows 10

i wont use 10 myself.
if i get a machine that cant run 7 or linux it gets sold.
that tends to be those craptastic convertible tablet things mainly.
when micro$oft was giving free 10 "upgrades" i...
Forum: General Electronics Technical Discussion 04-23-2019, 06:45 AM
Replies: 13
Views: 1,755
Posted By kc8adu
Re: PIC16F676 Program, remote control switch for 2Light & 1Fan.

this is to prevent corruption during a glitch.
key has to be sent to enable the chip to accept a write.

the protect fuse on the pic is to prevent copying.
but there are ways of circumventing...
Forum: General Electronics Technical Discussion 04-20-2019, 08:19 PM
Replies: 25
Views: 2,334
Posted By kc8adu
Re: LED Flashlight cree xm-l t6 COB Review of power supply

http://budgetlightforum.com/node/65678
a whateverfire shit with a different name.
they didnt even bother to fix the chinglish found on many other junk batteries.
Forum: General Electronics Technical Discussion 04-20-2019, 08:15 PM
Replies: 25
Views: 2,334
Posted By kc8adu
Re: LED Flashlight cree xm-l t6 COB Review of power supply

i doubt that will pass a hipot test.
not enough separation.
no opto either.
no cc/cv charge control.
it just floats the cell at 4.2v
thats a nono for li-ion.
kill it with fire before it kills...
Forum: General Electronics Technical Discussion 04-07-2019, 08:25 AM
Replies: 25
Views: 2,334
Posted By kc8adu
Re: LED Flashlight cree xm-l t6 COB Review of power supply

post a pic.
sounds like a generic $3 zoomie.
rebadged by scheisters as the g700 x800 atomic beam ect.
its got a really cheap asic in there and resistor to limit current.
the can the led mcpcb...
Forum: General Electronics Technical Discussion 04-07-2019, 06:06 AM
Replies: 10
Views: 1,376
Posted By kc8adu
Re: Where can I find good quality LEDS through hole type

ROFLOL! at the $150 lot!
what is the application you need these for?
Forum: Troubleshooting Game Consoles & Other Weird Devices 04-07-2019, 05:55 AM
Replies: 5
Views: 1,264
Posted By kc8adu
Re: ESR-Micro V4.0 does not measure anymore

leaky switch confusing the cpu.
Forum: General Electronics Technical Discussion 04-07-2019, 04:22 AM
Replies: 25
Views: 2,334
Posted By kc8adu
Re: LED Flashlight cree xm-l t6 COB Review of power supply

about 90% of the *.fire stuff has no protection even if stated that it does.
a zener to set charging voltage is silly.
sounds like this thing isnt worth the tinfoil its made of.
if the...
Forum: Troubleshooting Power Supplies and Power Supply Design 02-21-2019, 01:22 AM
Replies: 15
Views: 1,816
Posted By kc8adu
Re: X-Force 200 "Power Supply"

more nasty shit for childrens band.
meant to power a spurious and harmonics generator.
aka splatterbox amplifier.
x-farce!
Showing results 1 to 25 of 500

 
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