What lab power supply is this?

[nuno]

A local company is importing this from somewhere and rebranding it, but no specs other than the basic stuff you see in the image. It says it has an "RF signal tester", whatever that really means. Looks like it has 100uA resolution?...
Can you recognize this power supply? Thanks

[bitseeker]

I haven't seen this exact faceplate design before, but the overall form factor looks like the typical 30V 3A or 30V 5A power supplies from China.

[babysitter]

If it really emits this, I suppose you will get in trouble with your local frequency management agency.

[Dave]

If it really emits this, I suppose you will get in trouble with your local frequency management agency.

No, no, it detects up to 10 megawatts of RF.

[azer]

It's a Yihua 3005d
http://yihua-gz.com/Products_detail.asp?id=592&sortid=264
and yes there is a radio frequency detection option
"It has a cell phone radio-frequency detection function, which is of a 4.2V 2A/19V 5A fixed output function. Parameters can be displayed by pressing the key, which is fast and convenient. It is an essential tool for cell phone and laptop repair."

[nuno]

Thanks for the answers guys.

If it really emits this, I suppose you will get in trouble with your local frequency management agency.

No, no, it detects up to 10 megawatts of RF.

Now that must be a very simple detector circuit

It's a Yihua 3005d
http://yihua-gz.com/Products_detail.asp?id=592&sortid=264
and yes there is a radio frequency detection option (...)

Thanks azer. Looks like it's a switched power supply after all. No explicit resolution mentioned. Shady description.

[bitseeker]

It's a Yihua 3005d
http://yihua-gz.com/Products_detail.asp?id=592&sortid=264
and yes there is a radio frequency detection option (...)

Thanks azer. Looks like it's a switched power supply after all. No explicit resolution mentioned. Shady description.

I wouldn't have expected it to be switched for 5A.

Planning a new addition to the bench, nuno?

[jeroen79]

It's described rather weird indeed. A 4.2V/2A RF detector?

The way I interpret it is that it has an RF detector that will show the signal strength on the display and output presets for 4.2V/2A (1 Li-Ion cell) and 19V/5A (laptop charger).

I wonder what the Sound button does.

[nctnico]

I guess that RF detection function will be popular in GSM repair shacks in Asia but I can't really think of any other purpose.

[jeroen79]

With the stated bandwidth it could be used for other VHF and low UHF transmitters as well.
But I would guess that professional repairers would rely on other equipment for testing the radio output.
But if you just need to know if the device you're working on transmits something it would have some use.

[nuno]

Planning a new addition to the bench, nuno?

Price was so-so, just curious.

[PointyOintment]

I guess that RF detection function will be popular in GSM repair shacks in Asia but I can't really think of any other purpose.

Yihua, as well as Atten, are brands that target specifically cellphone/computer repair shops. That's why I will never buy test equipment from these companies.

You don't want people to see them on your bench, think you're a cell phone repairer, and bring you all their broken phones?

[madires]

But it would be the right PSU to blow up $3 arduino clones No tear-down video on youtube, just one unboxing one. BTW, the cheapest offer I've seen is US$113 (seller in Israel).

[NiHaoMike]

Odd they chose to limit it to 1.8GHz. It would be more reasonable to also cover the 2.4GHz and maybe 5GHz Wifi bands.

[madires]

Are mobile phones less ubiquitous than WiFi? And they have bluetooth and WiFi too. I think, a band switch would be useful.

[NottheDan]

I wouldn't have expected it to be switched for 5A.

I think their model numbers ending in "D" are the switched ones

[nuno]

But it would be the right PSU to blow up $3 arduino clones No tear-down video on youtube, just one unboxing one. BTW, the cheapest offer I've seen is US$113 (seller in Israel).

The price I have here is ~US$73 + VAT from an importer, but they sell exclusively to retailers (I am).