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Search: Posts Made By: ipman
Forum: Audio Equipment Discussion 10-13-2011, 01:22 PM
Replies: 9
Views: 2,985
Posted By ipman
Re: I can be an idiot sometimes

Did you mean "iron curtain"?

Nowhere is heaven, of course. Europe is more expensive than US, especially eastern part, but we have lower wages here.
The real problem is that we have no surplus,...
Forum: Power Supply Design and Troubleshooting 10-13-2011, 12:37 PM
Replies: 10
Views: 1,989
Posted By ipman
Re: Power Supply

12V will prevent the transmitter to obtain full power. The power supply can be modified, if you know how to, but any switching supply will supply noise.
The best solution is one biiiig transformer,...
Forum: General Computer Discussion 10-09-2011, 01:23 PM
Replies: 1,744
Views: 276,032
Posted By ipman
Re: best cheap/free scores 1.1

I've got a WRT54G v7 (does not support dd-wrt) for around $5 here as defective. In fact, the power supply was bad, the router was working just fine.
Forum: General Computer Discussion 10-09-2011, 01:21 PM
Replies: 11
Views: 2,463
Posted By ipman
Re: ATX power supply not made in China

My search about Zalman units revealed that they outsource to China-based OEM's.
Forum: Equipment Usage, Soldering, Techniques, and Reviews 10-09-2011, 01:20 PM
Replies: 43
Views: 25,703
Posted By ipman
Re: recommend ESR meter, Multimeter, hot air rework station

It depends mostly on where you live.
About multimeters: Fluke second-hand are very good tools.
About ESR meter: Blue ESR meter or Peak ones are good, but quite expensive if you don't live (read:...
Forum: Power Supply Design and Troubleshooting 10-09-2011, 05:31 AM
Replies: 5
Views: 1,964
Posted By ipman
Re: Capacitors for SPS

Sorry, forgot to mention that the capacity of filtering caps also depend on the frequency (on which the switchers are working).
So, it's not too easy to tell a value without knowing some...
Forum: General Computer Discussion 10-09-2011, 05:19 AM
Replies: 11
Views: 2,463
Posted By ipman
Re: ATX power supply not made in China

Taiwan is also China for some time ...
Forum: General Computer Discussion 10-08-2011, 11:07 AM
Replies: 11
Views: 2,463
Posted By ipman
Re: ATX power supply not made in China

Unfortunatelly I can't tell you just that the electronics industry is a heavy polluter, so it still exists where law about pollution are loose.
Hardly any electronics are made outside Asia, and if...
Forum: Audio Equipment Discussion 10-07-2011, 01:05 PM
Replies: 9
Views: 2,985
Posted By ipman
Re: I can be an idiot sometimes

Jack, me and Th3_uN1Qu3 are living in a east-european ex-comunist country.
In the former comunism times Lamba and HP were ... let's say "enemy".
Afther the fall of comunism, everything made here...
Forum: Troubleshooting Computer Displays 10-06-2011, 11:33 AM
Replies: 29
Views: 5,211
Posted By ipman
Re: 2 sec to off, 22" LG Flatron, W2252QT

No, but you can trace the circuit and identify which one goes to which voltage easily.
Usually the higher voltage caps are feeding the invertor, and the smaller ones the logic board.
You can be...
Forum: Audio Equipment Discussion 10-06-2011, 11:20 AM
Replies: 9
Views: 2,985
Posted By ipman
Re: I can be an idiot sometimes

Not here unfortunatelly.
Forum: General Electronics Technical Discussion 10-06-2011, 11:18 AM
Replies: 41
Views: 17,787
Posted By ipman
Re: Using an ESR Meter (and Reference Chart)

ESR is not the same for a capacity at different voltages.
Forum: Audio Equipment Discussion 10-03-2011, 09:14 AM
Replies: 22
Views: 4,366
Posted By ipman
Re: Bother with sound card?

Not much to gain then.
Forum: General Capacitor Questions & Issues 10-03-2011, 02:54 AM
Replies: 10
Views: 3,155
Posted By ipman
Re: Has anyone of you guys seen these?

Still got a lot of them in my boxes, from old tube tv's. They were quite common in communist countries, made locally, and very reliable.
Altough the oldest caps I have are from a National TV (now...
Forum: Power Supply Design and Troubleshooting 10-03-2011, 02:44 AM
Replies: 10
Views: 2,919
Posted By ipman
Re: I need Dell GX60, GX260, and GX280 advise...

Sure, PCBONEZ, you are right. But if it's only one, you can test the ESR on-circuit.
Altough, even there's only one cap, one cannot test capacity in-circuit anyway.
Forum: Audio Equipment Discussion 10-03-2011, 02:40 AM
Replies: 22
Views: 4,366
Posted By ipman
Re: Bother with sound card?

You will get some better quality with high-end sound cards like M-audio, but that depends on your budget.
Forum: Other Devices with Bad Capacitors 09-30-2011, 05:59 AM
Replies: 3
Views: 4,088
Posted By ipman
Re: Bad caps in Lexus instrument cluster

Nowadays they used leds (all colors) allmost anywhere in cars.
Forum: General Electronics Technical Discussion 09-30-2011, 05:49 AM
Replies: 9
Views: 4,833
Posted By ipman
Re: New-old stock capacitors

I have many old caps, one of them dating before 90's which are ok. They were not used, just sat in a box.
But also had several ones damaged also sitting.
You may never know.
Forum: Power Supply Design and Troubleshooting 09-30-2011, 05:32 AM
Replies: 10
Views: 2,919
Posted By ipman
Re: I need Dell GX60, GX260, and GX280 advise...

You cannot test the capacity in-circuit, just the ESR.
Remove the solder around one leg of the capacitor, make sure that it will not touch the PCB and then measure it. That's the best you can do.
Forum: Power Supply Design and Troubleshooting 09-30-2011, 05:29 AM
Replies: 5
Views: 1,964
Posted By ipman
Re: Capacitors for SPS

A power supply uses many caps in different roles. A cap used for filtering is not the same as a startup cap for example. Or a cap filtering 20amps is not the same as a cap filtering 500miliamps....
Forum: Equipment Usage, Soldering, Techniques, and Reviews 09-30-2011, 05:25 AM
Replies: 21
Views: 6,428
Posted By ipman
Re: I fried my ESR Micro 3.1 ...

Look for that resistor on a dead motherboard. You can be lucky and find one.
Forum: Audio Equipment Discussion 09-28-2011, 03:32 AM
Replies: 6
Views: 2,542
Posted By ipman
Re: 2.1 speakers burnt resistor of unknown value

That can happen, usually with carbon-based resistors. They can burn all paint and isolation, even smoke, and they are still good.
Forum: Power Supply Design and Troubleshooting 09-28-2011, 03:15 AM
Replies: 40
Views: 5,555
Posted By ipman
Re: Thermaltake PurePower 420w W0052

Cannot find anything else than Jamicon here. Until I can find a better replacement, I hope it will do the job. It is a test PS, so it will not have much uptime.
Anyway, now I have 5.1V, way less...
Forum: Power Supply Design and Troubleshooting 09-28-2011, 03:10 AM
Replies: 10
Views: 2,919
Posted By ipman
Re: I need Dell GX60, GX260, and GX280 advise...

Is the ESR that matters. You can have caps which show normal capacity, but very high ESR.
Sometimes, higher ESR is associated with capacity loss, but not allways.
Maybe an ESR meter will pay off.
Forum: Power Supply Design and Troubleshooting 09-26-2011, 02:45 AM
Replies: 40
Views: 5,555
Posted By ipman
Re: Thermaltake PurePower 420w W0052

Yesterday had enough time to work on it.
Replaced that Teapo 4.7uF/50V cap with a Jamicon 4.7uF/63V same can size. Also replaced the unknown diode with a 5v6 1.3watt Zener on secondary.
Afther...
Showing results 1 to 25 of 126

 
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