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Search took 0.13 seconds. Search: Posts Made By: stj
Forum: Troubleshooting Power Supplies and Power Supply Design Today, 12:12 PM
Replies: 12
Views: 434
Posted By stj
Re: Generic Magsafe charger ghost touches

add an earth connection - change the figure-8 socket for a cloverleaf style
Forum: General Electronics Technical Discussion Today, 12:10 PM
Replies: 7
Views: 82
Posted By stj
Re: bad cap cause fuse to blow?

you probably cant test the cap - many have a parallel discharge resister in them
Forum: General Electronics Technical Discussion Today, 03:18 AM
Replies: 7
Views: 156
Posted By stj
Re: What is this component? No markings whatsoever.

use a meter,
if it uses a ball of mercury it wont make any sound
Forum: Troubleshooting Audio Equipment Yesterday, 03:48 PM
Replies: 18
Views: 217
Posted By stj
Re: Dummy loads for amplifier fault finding

so, let me describe a stable dummy load i remember from "back in the day"

you take a metal paint can,
put a connector through the lid - PL259, N or whatever
inside you put 2 metal discs with a...
Forum: General Electronics Technical Discussion Yesterday, 08:23 AM
Replies: 9
Views: 126
Posted By stj
Re: Component identification

https://cpc.farnell.com/panasonic/ecqu2a223kla/capacitor-x2-0-022uf-275v-10/dp/CA07112
Forum: General Electronics Technical Discussion Yesterday, 08:18 AM
Replies: 7
Views: 142
Posted By stj
Re: Another Kenwood CS-4035 question

thats strange, you would expect the switch frame to be bolted to the chassis!
Forum: General Electronics Technical Discussion Yesterday, 08:16 AM
Replies: 9
Views: 126
Posted By stj
Re: Component identification

why sweden?
you can get good panasonic replacements from RS in the u.k.

postage/handling wont be fun though.
CPC has lower minimum order rules - maybe cpc has some.
Forum: Troubleshooting Game Consoles & Other Weird Devices 05-25-2022, 01:17 PM
Replies: 8
Views: 473
Posted By stj
Re: Ps3 Fat 60 gb RED LIGHT

not sure what you mean?
Forum: Troubleshooting Game Consoles & Other Weird Devices 05-25-2022, 08:25 AM
Replies: 8
Views: 473
Posted By stj
Re: Ps3 Fat 60 gb RED LIGHT

what caps? tantalum?
could be shit, but i never had a bad one.
maybe reversed? too much heat from soldering?

can you link what you purchased.
Forum: General Electronics Technical Discussion 05-25-2022, 04:06 AM
Replies: 4
Views: 103
Posted By stj
Re: what is the number of this transistor

it may be a 3v regulator
Forum: General Electronics Technical Discussion 05-25-2022, 04:02 AM
Replies: 7
Views: 156
Posted By stj
Re: What is this component? No markings whatsoever.

interesting, it looks like ceramic
maybe a spark gap - whats it from?
Forum: General Electronics Technical Discussion 05-23-2022, 12:55 PM
Replies: 7
Views: 142
Posted By stj
Re: Another Kenwood CS-4035 question

on my old scopes, they all needed the contact cleaner in the rotary range-switches
Forum: General Electronics Technical Discussion 05-23-2022, 04:43 AM
Replies: 7
Views: 142
Posted By stj
Re: Another Kenwood CS-4035 question

dirty connectors or bad soldering.
time for a close look and a can of contact cleaner :)
CPC sells own-brand contact cleaner at a reasonable price
Forum: General Electronics Technical Discussion 05-21-2022, 02:42 PM
Replies: 8
Views: 173
Posted By stj
Re: Are these devices any good ( 5" TFT LCD Monitor Reversing Truck 4Pin Camera feed

UV will kill most plastic very fast.
if you can put it behind glass then most UVB/C will be blocked
Forum: Equipment Usage, Soldering, Techniques, and Reviews 05-21-2022, 02:40 PM
Replies: 6
Views: 444
Posted By stj
Re: Hot air station - 858D opinions?

your friend should check if he has a 110 or 220v heater in it then - you never know, he may have a 220v model
Forum: Troubleshooting Power Supplies and Power Supply Design 05-19-2022, 08:16 AM
Replies: 13
Views: 318
Posted By stj
Re: identify torroidal transformer amperage

110VA

based on weight and outputs
using these as reference:
https://uk.rs-online.com/web/p/toroidal-transformers/2238049
https://uk.rs-online.com/web/p/toroidal-transformers/7581042
Forum: General Electronics Technical Discussion 05-19-2022, 06:11 AM
Replies: 1
Views: 81
Posted By stj
Re: Component identification marking NTX

your missing some numbers,
show where it came from.
it could actually be a MOV (metal oxide varister)
Forum: General Capacitor Questions & Issues 05-17-2022, 03:33 AM
Replies: 7
Views: 142
Posted By stj
Re: Cap Identification

domino's :)

go watch mr carlson's lab
https://www.youtube.com/c/MrCarlsonsLab/playlists
Forum: Troubleshooting Power Supplies and Power Supply Design 05-17-2022, 03:21 AM
Replies: 3
Views: 96
Posted By stj
Re: Bestec ATX0300F5WA - fast,or slow blow, fuse?

nothing etched on the metal fuse ends?
Forum: Troubleshooting Power Supplies and Power Supply Design 05-17-2022, 03:20 AM
Replies: 5
Views: 139
Posted By stj
Re: A Shorted wirewound resistor?

thats too high for current sense i think - more likely it's inline with the gate of the fet
Forum: Equipment Usage, Soldering, Techniques, and Reviews 05-16-2022, 12:46 PM
Replies: 9
Views: 209
Posted By stj
Re: Calibration 50 Ohm question

if the generator has a 50ohm output inpedence then we are good.
Forum: General Electronics Technical Discussion 05-16-2022, 06:26 AM
Replies: 4
Views: 136
Posted By stj
Re: Anyone know what this is?

MG is some manufacturer code, they usually just have the frequency on them.
Forum: Equipment Usage, Soldering, Techniques, and Reviews 05-16-2022, 06:24 AM
Replies: 9
Views: 209
Posted By stj
Re: Calibration 50 Ohm question

50ohm BNC passthrough - very easy to find

btw, imo calibration isnt important - you will just be looking at the waveform if it doesnt have "readout" capability

the voltage selector issue is...
Forum: Troubleshooting Power Supplies and Power Supply Design 05-16-2022, 03:42 AM
Replies: 5
Views: 139
Posted By stj
Re: A Shorted wirewound resistor?

thats a fuseable resistor, if it's not open circuit then it's fine
Forum: Troubleshooting Power Supplies and Power Supply Design 05-16-2022, 03:38 AM
Replies: 17
Views: 239
Posted By stj
Re: equivalent for HT3582DM

i can probably send you a module - i think i have some spare.
you have the holder already i presume?
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