Electronics > Beginners
ebay, weird bench supply
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6PTsocket:
I am looking for a linear bench supply and I came across this one that said "linear" but reading further it said " PWM voltage stabilization. I emailed the seller to find our which it was and got this answer:
"Thanks for your letter and your interests in our product.
The item uses PWM switching voltage stabilizer and MOS linear adjustment mode."
Is this double talk for a switching power supply by a seller repeating the blurb that came from China with the PS or is it some hybrid technology I am unaware of? Are they talking about the DC output that is fed back to the PWM controller to regulate the supply? Thanks.
I have since found another candidate Mastech/Voltq that is definitely linear, less than a mv of noise and 4 digit neters that resolve to 1ma. Nice for general use but I am curious about the first ad.



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JackJones:
What's the manufacturer and model?

Maybe they are using switching supply for preregulation to a linear one or something?
6PTsocket:

--- Quote from: JackJones on June 04, 2019, 02:53:33 pm ---What's the manufacturer and model?

Maybe they are using switching supply for preregulation to a linear one or something?

--- End quote ---
Brand: YeacomUSA, Model: YES2990. Output: 0-30volts, 10A. Price: around 56 bucks.
I don't even see a name on the front panel.  It is clearly a Chinese generic. The brand is just the California importer. They did invite me to call for more info. It HAS to be a switcher at that price.

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6PTsocket:

--- Quote from: 6PTsocket on June 04, 2019, 03:47:43 pm ---
--- Quote from: JackJones on June 04, 2019, 02:53:33 pm ---What's the manufacturer and model?

Maybe they are using switching supply for preregulation to a linear one or something?

--- End quote ---
Brand: YeacomUSA, Model: YES2990. Output: 0-30volts, 10A. Price: around 56 bucks.
I don't even see a name on the front panel.  It is clearly a Chinese generic. The brand is just the California importer. They did invite me to call for more info. It HAS to be a switcher at that price.

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--- End quote ---
Oops! Typo. That is YescomUSA

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6PTsocket:
I just googled the brand and they also import dance (stripper) poles and tents. Glad I didn't bother to call. LOL!! Can you imagine trying to get tech support?

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