Power Supply for Advantest R4131A

Hi

Thank you for the email addresses but it was not possible to use them because the server could'n find them.

I live in Costa Rica.

Joachim

That does not make any difference, you just need to use an email program and the supplied address. You can live anywhere (except maybe China, they block some things!) and it should work......they were not web links.....!!

Good advice, I was going to say the same.....I will rate this as positive.

Try http://www.xppower.com navigate to your part of the world then choose selector.

You may need to settle for

ECM100UT33 85-264 VAC 5 V/10 A, 15 V/3 A, -15 V/0.8 A

And add a 15 to 12 Volt supply

Or there's a quad 5V, 24V, ±15 V.

Don't know your time space constraints. Your cheapest option may be an old PC PSU (5V and 12V) and an off the shelf ±15V unit.

The load on the secondary changes the load on the primary (otherwise you'd quickly develop an over unity engine )

Hello again Guest,

I meant to address your other questions, but missed them out, sorry.

1. "How is it possible that when I change something on the secondary side it affects the frequency of the pimary side?
2. There is no connection inside of the transformer between the secondary and the primary?"

There is no electrical connection between the primary and secondary transformer windings.

There is, however a magnetic circuit linkage between the two, and that magnetic linkage strength alters, as load or otherwise is increased/decreased on the secondary winding, or the voltage is altered into the primary winding.

If you are intending to use an Advantest R4131A Spectrum Analyzer, you should understand the basic physics of an electrical transformer, as discovered by Michael Faraday.

Learn the basics about Transformers here: http://en.wikipedia.org/wiki/Transformer

Kind Regards....

Hello

Thank you for the mail addresses. Iwill write them to ask for a power supply.

The problem of my spectrum analyzer was, that when I was working on a homemade radio the power supply I was using failed and delivered suddenly 60V on the common. This destroyed the power supply of the analyzer and also something else, I guess it is the attenuator.

I will post you everything new what happened to my analyzer.

Joachim

Good morning,

Many switching power supplies have a inherent problem, in that you must draw a minimum load (usually 10%) of the main output's rated current in order for the supply to regulate properly. What you'll see in many cases is a lower voltage on the secondary outputs, and the supply will oscillate as it "hunts".

Which brings me to my second point-output sensing. Again, many switchers have remote sensing to regulate the voltage at the load, rather than at the supply output terminals. If the sense leads are left open-circuited, the supply tends to "run away", or if there's open-sense-lead protection (usually a resistor between the +out and + sense leads), the supply will run at a higher voltage.

Vicor (www.vicr.com) has excellent application information on switching power supplies.

Hope this helps.

Hi,

You helped a lot

I was triying to repair the power supply out of the analyzer.(no load).I supplanted the aux. transformer with a fixed 12V power supply. All the outputs oscillate.

After I read your comment I connected the power supply to the analyzer and, bingo! the analyzer worked again. That means, the functions worked.

Now I will try to find the broken transformer and repair the analyzer itself, starting with the attenuator.

Excuse my english. I live in Costa Rica and english is not my my best language.

Thank you.

Joachim

Hi, The best thing I can suggest you is to get a new smps (you will get any size and ratings now a days).

The primary freeq is changing with a change in the secondery voltage! Yes that is the very same principle of the working of an SMPS.