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Search: Posts Made By: stj
Forum: General Capacitor Questions & Issues Today, 03:49 AM
Replies: 1
Views: 52
Posted By stj
Forum: General Computer & Tech Discussion Yesterday, 05:23 PM
Replies: 51
Views: 851
Posted By stj
Forum: General Electronics Technical Discussion 10-02-2022, 02:45 PM
Replies: 16
Views: 305
Posted By stj
Re: Pinout of TV antenna cable

not telephone,
wrong colours and phone cable uses 2 thin twisted pairs

one thing i noticed in that picture is the thick teflon looking insulation!
Forum: Troubleshooting TVs and Video Sources 10-02-2022, 12:59 PM
Replies: 6
Views: 153
Posted By stj
Re: Dune Duo multimedia player Power supply

the missing piece is in the unit or on that board - shake them over a table :)
Forum: General Computer & Tech Discussion 10-02-2022, 07:12 AM
Replies: 51
Views: 851
Posted By stj
Re: Gateway 80486-DX2/50 Revival

lba48 can be fixed in a couple of ways
one is to customise the bios if it's one that supports "modules"
the other is an extra rom on a network card
Forum: General Computer & Tech Discussion 10-02-2022, 02:07 AM
Replies: 7
Views: 211
Posted By stj
Re: What connector is this?

why do you have a small telephone switchboard??
not seen one of those for decades!!
Forum: Troubleshooting Appliances and other Household Electronic Stuff 10-01-2022, 03:50 PM
Replies: 30
Views: 440
Posted By stj
Forum: General Computer & Tech Discussion 10-01-2022, 03:49 PM
Replies: 7
Views: 211
Posted By stj
Re: What connector is this?

no, it's a variant of a u.s. phone plug
Forum: Troubleshooting Printers, Copiers, Scanners and other Imaging & Printing Devices 10-01-2022, 02:52 PM
Replies: 5
Views: 124
Posted By stj
Re: Nikon D800 camera - flash donít work and capacitor donít charge

the caps are special and dont last forever
be carefull it doesnt hold a charge before you meter it - or you could damage the meter
Forum: Troubleshooting Printers, Copiers, Scanners and other Imaging & Printing Devices 10-01-2022, 10:56 AM
Replies: 5
Views: 124
Posted By stj
Re: Nikon D800 camera - flash donít work and capacitor donít charge

isolate the cap, short the pins - for safety
then meter it - it could fail short-circuit

you can usually hear the high voltage booster running - like a high pitch whistle - do you hear it?
Forum: Troubleshooting Appliances and other Household Electronic Stuff 10-01-2022, 10:53 AM
Replies: 30
Views: 440
Posted By stj
Re: Sencor SVC7020BK robot vacuum cleaner problem

they mean nothing,
it's production tracking data
Forum: Troubleshooting Power Supplies and Power Supply Design 10-01-2022, 09:03 AM
Replies: 54
Views: 924
Posted By stj
Re: Fish Tank LED Power Supply Gets Hot then shuts down

maybe the opamp died - easy to diagnose the fault in them.
Forum: Troubleshooting Power Supplies and Power Supply Design 10-01-2022, 03:41 AM
Replies: 54
Views: 924
Posted By stj
Re: Fish Tank LED Power Supply Gets Hot then shuts down

dont you have a DC clamp-meter btw?
i thought everybody got one when uni-T released the cheap one!
Forum: General Electronics Technical Discussion 10-01-2022, 03:38 AM
Replies: 16
Views: 305
Posted By stj
Re: Pinout of TV antenna cable

the u.k. never used pairs for RF, always been coax.
a sattelite jack is unlikely, those use a screened feedback if done right.
a polariser is possible.
or could it have been power for a masthead...
Forum: General Electronics Technical Discussion 09-30-2022, 02:33 PM
Replies: 16
Views: 305
Posted By stj
Re: Pinout of TV antenna cable

thats strange - was any coax with it?
old sattelite dishes had extra control cables.
Forum: Troubleshooting Power Supplies and Power Supply Design 09-30-2022, 10:06 AM
Replies: 54
Views: 924
Posted By stj
Re: Fish Tank LED Power Supply Gets Hot then shuts down

20A on each rail is under 500w i'm sure.
tempting to use 2 chinese psu's - one for each voltage.

or a meanwell dual output - if they have a compatable one
Forum: General Computer & Tech Discussion 09-30-2022, 10:02 AM
Replies: 51
Views: 851
Posted By stj
Re: Gateway 80486-DX2/50 Revival

i find that shit cdr's that modern drives cant read are often still readable on *decent*(SCSI) drives like Plextor and Toshiba, probably NEC too but i dont have any to try.
Forum: Troubleshooting Power Supplies and Power Supply Design 09-30-2022, 08:40 AM
Replies: 54
Views: 924
Posted By stj
Re: Fish Tank LED Power Supply Gets Hot then shuts down

i think you need to check the current on the 12v line.

it could be mostly using 5v,
those old AT psu's had mostly 5v output, the 12v was only for the harddrives.
in that case an ATX is useless...
Forum: Troubleshooting Power Supplies and Power Supply Design 09-30-2022, 05:20 AM
Replies: 54
Views: 924
Posted By stj
Re: Fish Tank LED Power Supply Gets Hot then shuts down

i read that they got put out of business by a bogus patent for " a light fixture containing leds that mounts on top of an aquarium enclosure"

thats almost as bad as the bullshit between apple and...
Forum: Troubleshooting Power Supplies and Power Supply Design 09-30-2022, 02:26 AM
Replies: 54
Views: 924
Posted By stj
Re: Fish Tank LED Power Supply Gets Hot then shuts down

thats a hell of a lot - i wonder what it's driving!
Forum: General Computer & Tech Discussion 09-29-2022, 08:33 AM
Replies: 51
Views: 851
Posted By stj
Re: Gateway 80486-DX2/50 Revival

your supposed to install the chip driver first.
Forum: General Computer & Tech Discussion 09-29-2022, 03:07 AM
Replies: 51
Views: 851
Posted By stj
Re: Gateway 80486-DX2/50 Revival

what dos?
did you try freedos?

what chip is on the card? i can probably find the correct driver
Forum: Troubleshooting Power Supplies and Power Supply Design 09-28-2022, 06:23 PM
Replies: 54
Views: 924
Posted By stj
Re: Fish Tank LED Power Supply Gets Hot then shuts down

yes, run it a see how much current is flowing
and recap that psu starting with the output caps and the small stuff
Forum: General Electronics Technical Discussion 09-28-2022, 11:35 AM
Replies: 25
Views: 561
Posted By stj
Re: A Cautionary Tale - Alli Express

china likes labor camps.

hand chopping = saudi's and to a lesser extent afghanistan and iran,
but in the last 2 cases you really need to be adicted to getting caught - usually they just give you...
Forum: Troubleshooting Power Supplies and Power Supply Design 09-28-2022, 11:32 AM
Replies: 54
Views: 924
Posted By stj
Re: Fish Tank LED Power Supply Gets Hot then shuts down

you could just fire up the original working psu with a dc clamp-meter on the 5v and then 12v rails to see what it draws
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