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Inside the Owon P4603/P4305 linear PSU

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vutt:
27.08.2020 update: Added inside pic. It looks like 30V version is using lower  temp rated (only 85C) caps. Also brand is different.

Well I pulled the trigger on 30V Multicomp PRO version . In my Country in EU it cost 154 EUR +VAT.
I was hoping that some of the shortcomings have been fixed because newer SW version.

But no. Same spikes when turning AC power on

And O.V.P. is as slow as with OWON version (OVP was set at 13V)


Also any changes in parameters will require up to 25 sec wait time before actual memory save will happen.

However I'm quite happy with it regardless. It is step up from my Gophert NPS-1601. Well except in noise department.

John B:
I'm looking at purchasing the Multicomp Pro rebranded version of this unit, the 60V 3A model with USB/RS232 specifically. Am I right in thinking that the issues are still present in the unit?

The other slightly cheaper option is the Tenma branded lineup which I think is a Korad unit:

https://au.element14.com/tenma/72-2550/power-supply-1ch-60v-3a-prog/dp/244541402

My only experience with them is that Dave Jones blew up one like 8 years ago, so I have no info on whether the design has been improved enough over the years. I'm just looking to add another channel with 60V output natively, I don't absolutely need the extra features on the Multicomp unit (power reading is nice), but I'm willing to spend a bit extra if the unit has less issues than the Korad/Tenma units.

MarkF:
At that price, I would sooner have the Siglent SPD1305X for $20 more instead of the Owon.
30 volts, 5 amps, USB interface and sense lines.



Defpom did a review: 

rdl:
They did make changes to fix the Korad power supply. There was a video posted on Dave's "Altzone" youtube channel.

https://youtu.be/uecvB4U1fps

tautech:

--- Quote from: MarkF on June 23, 2021, 11:47:16 pm ---At that price, I would sooner have the Siglent SPD1305X

Defpom did a review:  ...................

--- End quote ---
Then he ordered the 16V 8A unit from us.

Thread:
https://www.eevblog.com/forum/testgear/new-spd1168x-siglent-psu/

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