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Search: Posts Made By: stj
Forum: Troubleshooting Power Supplies and Power Supply Design Yesterday, 10:56 AM
Replies: 18
Views: 7,517
Posted By stj
Re: Troubleshooting B&W Original Powersupply

they probably shouldnt of named it after something that went up in flames! :D
Forum: General Computer & Tech Discussion Yesterday, 10:51 AM
Replies: 4,270
Views: 661,068
Posted By stj
Re: best cheap/free scores 1.1

that's incredible.
maybe this will be interesting! :jawdrop:
https://create.arduino.cc/projecthub/8bitkick/bbc-micro-online-38d004
Forum: Troubleshooting Power Supplies and Power Supply Design Yesterday, 04:49 AM
Replies: 8
Views: 167
Posted By stj
Re: Older Macintosh Magnetek power supply ressurection

try resoldering everything in an area where the board went black
Forum: General Capacitor Questions & Issues Yesterday, 04:48 AM
Replies: 10
Views: 380
Posted By stj
Re: question about Polymodding

number of turns on the inductors, or just get the datasheet for the control chip
Forum: Troubleshooting Power Supplies and Power Supply Design 02-23-2020, 09:41 PM
Replies: 8
Views: 167
Posted By stj
Re: Older Macintosh Magnetek power supply ressurection

it probably needs a re-cap
specially in the area that got so hot the board turned black!!
Forum: General Computer & Tech Discussion 02-23-2020, 06:53 AM
Replies: 4,270
Views: 661,068
Posted By stj
Re: best cheap/free scores 1.1

nice, now use Heimdel to put TWRP and 7.1 or higher custom firmware on them. :)
Forum: Troubleshooting Game Consoles & Other Weird Devices 02-22-2020, 04:02 PM
Replies: 18
Views: 1,027
Posted By stj
Re: Aerogarden Ultra LED blinking or strobing grow lights repair

that's correct - make sure the diameter or pitch between the leads matches or the replacements wont fit
Forum: General Electronics Technical Discussion 02-22-2020, 01:55 PM
Replies: 3
Views: 62
Posted By stj
Re: Where to buy shielded cables like this one?

that;s probably lap-screened audio cable
Forum: Troubleshooting Power Supplies and Power Supply Design 02-22-2020, 01:53 PM
Replies: 8
Views: 134
Posted By stj
Re: Please help fixing this power supply 110vac to 24vdc 5vdc

it looks like you have to turn the triac on to power the rectifier!
Forum: Troubleshooting Game Consoles & Other Weird Devices 02-22-2020, 01:50 PM
Replies: 18
Views: 1,027
Posted By stj
Re: Aerogarden Ultra LED blinking or strobing grow lights repair

first line is the series,
second is the capacitance,
3rd is the voltage
Forum: Equipment Usage, Soldering, Techniques, and Reviews 02-22-2020, 10:59 AM
Replies: 18
Views: 197
Posted By stj
Re: Soldering Equipment Help

this is good:
https://www.aliexpress.com/item/UANME-Soldering-Paste-Mild-Rosin-Environmental-Soldering-Paste-Flux-PCB-IC-Parts-Welding-Soldering-Gel-Tool/32864986454.html
Forum: Equipment Usage, Soldering, Techniques, and Reviews 02-22-2020, 07:33 AM
Replies: 42
Views: 5,387
Posted By stj
Re: Using my CH341A.

if you dont want to build something,
another option is this!

i just recieved one yesterday - very capable for the price!
http://www.xgecu.com/EN/TL866_main.html...
Forum: Troubleshooting & Designing Networks 02-22-2020, 07:28 AM
Replies: 6
Views: 95
Posted By stj
Re: Wifi signal

maybe you can use a router in reverse to link to his router.
some have that option, others can sometimes have better software installed.

what routers do you have?
Forum: Troubleshooting & Designing Networks 02-21-2020, 06:15 PM
Replies: 6
Views: 95
Posted By stj
Re: Wifi signal

no, the losses in the cable will remove anything you gain from a decent 8dB+ antenna
Forum: Equipment Usage, Soldering, Techniques, and Reviews 02-21-2020, 10:19 AM
Replies: 18
Views: 197
Posted By stj
Re: Soldering Equipment Help

i have not worn out the tips on mine yet - dont put flux on the solder - it will eat the tip.
Forum: Equipment Usage, Soldering, Techniques, and Reviews 02-21-2020, 06:15 AM
Replies: 18
Views: 197
Posted By stj
Re: Soldering Equipment Help

dont buy the one with the aluminium handle - you need a nice rubber grip and not a smooth body that conducts heat!
Forum: General Electronics Technical Discussion 02-21-2020, 03:07 AM
Replies: 5
Views: 90
Posted By stj
Re: How do you bench test this type of USFF Desktop Power Supply

you apply 5v to the green wire to turn it on i think.
unfortunatly it does not supply 5v so you need a voltage regulator or a battery!

i know it alternates between 5v and 0v but not sure which...
Forum: Troubleshooting Computer Displays 02-20-2020, 03:55 PM
Replies: 193
Views: 4,768
Posted By stj
Re: Help with dead Commodore 1802

there is no standby trigger on the CBM monitors, just DPST mains switching.
Forum: Troubleshooting Power Supplies and Power Supply Design 02-20-2020, 11:23 AM
Replies: 13
Views: 226
Posted By stj
Forum: Troubleshooting Computer Displays 02-20-2020, 09:41 AM
Replies: 193
Views: 4,768
Posted By stj
Re: Help with dead Commodore 1802

https://www.rapidonline.com/power-pcb

:pimp:
Forum: Troubleshooting Computer Displays 02-20-2020, 08:11 AM
Replies: 193
Views: 4,768
Posted By stj
Re: Help with dead Commodore 1802

does that switch normally solder to the board, or have wires on it?
if it's wires then a replacement wouldnt be hard.

on the 8833-II i removed the pushbutton from the case and fitted a rocker...
Forum: Troubleshooting Power Supplies and Power Supply Design 02-20-2020, 04:33 AM
Replies: 5
Views: 395
Posted By stj
Re: Troubleshooting 2xFailed Cooler Master v650 PSUs

i think i know what they did.
check ZD6, check all the transistors bolted to heatsinks,
get the board out of the shell and see whats soldered to the other side.

i think they are using mosfets...
Forum: Troubleshooting Computer Displays 02-20-2020, 04:28 AM
Replies: 193
Views: 4,768
Posted By stj
Re: Help with dead Commodore 1802

btw, can you take a picture of the power switch?
i want to see if it's like the one on the phillips CM8833-II (commodore 1084-s)
Forum: General Computer & Tech Discussion 02-20-2020, 04:22 AM
Replies: 4
Views: 449
Posted By stj
Re: Hdmi adapters

i would assume it's for anything that comes in for repair:
computers, consoles ranging from HDMI all the way to composite video, AV amplifiers with OSD - anything really.
Forum: Troubleshooting Computer Displays 02-19-2020, 05:07 PM
Replies: 193
Views: 4,768
Posted By stj
Re: Help with dead Commodore 1802

you should check the B+ voltage and compare it to the manual - it can be ajusted.
it's DC btw. ;)
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