Electronics > Beginners
Choosing a PSU, what should I look for
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tautech:

--- Quote from: Mr. Scram on February 24, 2019, 06:13:21 am ---
--- Quote from: tautech on February 24, 2019, 05:33:10 am --- ::)
You too are not well read.

The original problem arose from a faulty batch of panel steel supplied to the company that made chassis for Siglent.
This has been discussed at length on at least a couple of occasions here over the years.

It is NOT as terminal for an instrument as crook PSU's or FRAM issues that some manufacturers have.

--- End quote ---
Belittling people who don't buy into the excuses isn't the smartest of moves. Even if there was "a faulty batch" Siglent is solely responsible for the quality of the products it puts out. That's what internal quality control is for. Besides, the problems seem a bit too widespread for it to be a single batch.

Admitting a mistake and showing improvements have been made is fine. Blaming others and downplaying the issue is exactly what people expect from chancy Chinese manufacturers and exactly what they don't need if they want to move up in the world. Own your mistakes and people will respect you for it, like the manufacturer with FRAM issues is doing.

--- End quote ---
I'll stick firmly to what I have posted and still call you unread.....or just too damn lazy to hunt out the appropriate threads, quotes and posts.  ::)

Catch up time, the most recent of this below is 3+ years old.
Start here:

--- Quote from: EEVblog on March 25, 2014, 09:35:36 am ---UPDATE:
I have been informed that Siglent took the rusting issue seriously and have retooled their process to fix it. They are sending me the new production model so I can show the differences.  :-+

--- End quote ---
And:

--- Quote from: Siglent on April 09, 2015, 10:16:08 am ---Our products do not have rust problem now.
Dear Dave, I hope you won't ban my account Siglent cause I want to communicate with customers and hear their voice.

--- End quote ---
And:

--- Quote from: EEVblog on April 09, 2015, 05:26:18 am ---
--- Quote from: dadler on April 08, 2015, 10:45:42 pm ---Note: Do not want to start drama here, this is a serious question.
Ever since I watched Dave's tear down of the Siglent AWG that had copious rust on the internal surfaces of the enclosure, I have been put off by Siglent products in general.
I never found a follow-up to that issue, and in searching just saw some mention that "maybe the factory is by the sea".
Is there a follow-up that addressed this issue?

--- End quote ---

They fixed it.

--- End quote ---
And:
https://www.eevblog.com/forum/testgear/siglent-they-filed-a-_wrongful-trademark-claim_/msg785401/#msg785401 (thread locked)
Post by EEVblog:

--- Quote ---Quote from: ulix on October 26, 2015, 02:31:33 am
Was there ever a statement form them about the rust on the case? I don't think so. The only changed it.
--- End quote ---

Yes, they changed their process and fixed it.
They were very poor at communicating this though.
forrestc:

--- Quote from: Calvin on February 23, 2019, 02:13:18 pm ---Rigol DP832A:
- Channel On/Off switches left-to-right arrangement (1-2-3) differs from that of the Display (1-3-2)  --> no words, just  :palm:
- radially segmented display with almost an overkill of information and hence mostly very small Fonts --> arrange either horizontaly or vertically, reduce the number count of infos and allow for large easy to read Fonts for the most important infos.
- arrangement of infos differ between channels. For ch 1 and 2 it´s vertical, for ch3 its mixed hor/vert -->  :-//
- redundant infos on a anyhow crowded display. The center circle repeats the set value of the highlighted channel -->  why?? :rant:

--- End quote ---

The above have largely been fixed a couple/few years back:

See http://www.mjlorton.com/forum/index.php?topic=652.0

As far as the intuitive button placements - i.e. near the channels, etc, once you switch to the new "classic" display style things feel more intuitive.   Yes, there are some odd placements, but I will say that it didn't take me long to just commit to muscle memory where they are.

I will say that for me entering the actual voltage is a big plus, and it's pretty intuitive - push the channel button if necessary to select your channel (or note your channel is selected in the display), then start pushing numbers and decimal point.  Then push V, mV, mA or A as relevant.

Moriambar:

--- Quote from: rdl on February 23, 2019, 10:54:41 pm ---In my mind both Siglent and Rigol have too many drawbacks to work around. I could never have anything from Siglent on my bench knowing it was probably rusting away on the inside. And Rigol with their toy-like, cluttered up front panels just look stupid. I'll stick with my used HP, Agilent, and Tektronix stuff. If I lived in Europe I'd probably be looking for a used TTi or R&S power supply.

--- End quote ---
The fact is that new = warranty (at least 2 years). Old = no guarantee. Also old = has already lasted for a number of years so its lifespan is (theoretically) shorter.
I actually have no real clue how to repair any of these if they fail me and that would translate in money loss. This not taking into account the fact that used stuff is usually (albeit not always) sold by normal people and not trusted sellers.

That's why I would never spend on used stuff: the risk of wasting money is too damn high and I do not have the luxury of wasting any money.
james_s:

--- Quote from: Mr. Scram on February 24, 2019, 05:21:18 am ---
--- Quote from: james_s on February 24, 2019, 05:00:30 am ---I've almost exclusively bought used gear and it has worked out very well. The one time I remember I did buy a new Chinese bench DMM I pretty quickly found I hated it, sold it after a few months and bought a used Fluke 45.

--- End quote ---
YMMV. One isn't exactly a large sample group.

--- End quote ---

Do I really have to point out that I'm not the only one here who has used gear? Thousands of people buy used gear and for most it works out just fine. Older higher end equipment tends to be very well made.
Moriambar:

--- Quote from: james_s on February 24, 2019, 06:44:35 pm ---
--- Quote from: Mr. Scram on February 24, 2019, 05:21:18 am ---
--- Quote from: james_s on February 24, 2019, 05:00:30 am ---I've almost exclusively bought used gear and it has worked out very well. The one time I remember I did buy a new Chinese bench DMM I pretty quickly found I hated it, sold it after a few months and bought a used Fluke 45.

--- End quote ---
YMMV. One isn't exactly a large sample group.

--- End quote ---

Do I really have to point out that I'm not the only one here who has used gear? Thousands of people buy used gear and for most it works out just fine. Older higher end equipment tends to be very well made.

--- End quote ---
Of course you're right. Everyone buys at their own risk. I simply cannot afford the risk.
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