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Old 07-02-2012, 01:28 PM   #51
c.hegge
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Actually, I've been considering doing something like that, I think it would be a fun experiment. I do have a DS1M12 Stingray (the same scope you use in reviews IIRC) and a load tester. The stingray is limited to 30V, though, so to see what the switchers are doing, I'd have to modify the PSU to use a lower voltage.

Last edited by c.hegge; 07-02-2012 at 01:33 PM.
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Old 07-02-2012, 06:47 PM   #52
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hook a copple of probes together in series eack 1 will give u a plus 10 factor if they have that switch thats how i do it
u will need a isolating transformer the voltages in a psu are all above ground and most of them are live and ur scope negative is grounded so ull need to plug ur psu or scope into it
and ill remind u that most scope probes are not rated or the best for mains voltage or scopes so be careful doesnt mean it cant be done but be careful
if ur testing on the seconary side u wont have to worry about mains voltage

ur going to have to put up with mi grammar and spelling im a aspie and partly dislexic and who cares about those anyway XD
the only thing that matters is that u understand mi information i pass along
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Old 07-02-2012, 07:48 PM   #53
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Well, I'm quite accustomed to modding electronic stuff (and I've even completely re-built some cheap and nasty PC PSUs, so they are now half-decent), so modifying one to use a safe input voltage to experiment with the primary side shouldn't be that hard.
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No wonder it doesn't work! You installed the coils backwards!

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Old 07-03-2012, 03:38 AM   #54
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id just use wats there as long as u use safe practises and set up protection and risk wat ur prepaired to lose ull be fine
ive tested live psu with basic stuff and am fine
the best scopes for the job are old 70~80's scopes they can just read mains voltage thanks to valves they use the popular and sought after ecc88 mostly
if ya can find older scopes they read even higher voltages at the cost of bandwith goes from 10~50mhz down to barely 1mhz
mi telequipment-phillips do 50v a divsion
mi phillips 60's ish scope does a maxium of 400v gm5655
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Old 07-03-2012, 07:13 AM   #55
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Quote:
Originally Posted by c.hegge View Post
Actually, I've been considering doing something like that, I think it would be a fun experiment. I do have a DS1M12 Stingray (the same scope you use in reviews IIRC) and a load tester. The stingray is limited to 30V, though, so to see what the switchers are doing, I'd have to modify the PSU to use a lower voltage.
You need to buy a differential probe (I bought it and it works like a charm):

http://www.probemaster.com/product_i...0be7d50e154856

Obs: there are cheaper solutions around, I just put a random link.

Don't use the Stingray directly inside the PSU; you will burn it (as I did), even with a x10 probe installed.

Gabriel.
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Old 07-03-2012, 01:29 PM   #56
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I know, which is why I would modify it to use a safer voltage (like 12V), as opposed to 320V.

I'll have to look around for a cheaper probe, though. $330 is out of my budget.

Anyhow, thanks for all the advice, I really do appreciate it.
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No wonder it doesn't work! You installed the coils backwards!

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Old 07-04-2012, 07:18 AM   #57
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microwave caps have good resistors built into them 1~10meg at high voltage be able to make a devider with thouse

i thought id just let u know i have aspergers and dislexica
mi spelling and gramar anit going to change
so ur wasting ur time infracturing me
feel free to edit mi posts if u do so like
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Old 07-05-2012, 07:52 AM   #58
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Quote:
Originally Posted by c.hegge View Post
I'll have to look around for a cheaper probe, though. $330 is out of my budget.
I posted the first link I found. I can't remember how much I paid for mine, but it wasn't that much...
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