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| Is there a better power supply option for $700? |
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| 2N3055:
Battery charging should be left to battery chargers. Battery chargers are cheap and common. |
| Pfriemler:
looking forward to buy a PSU, I got stuck on the GWs with load function as well. As a benefit to a well constructed and basically reliable PSU it‘s nice to have an EL, but I really love my Kunkin KP184 as a separate device, not only because it can handle up to 400 watts and 150 volts. Before that, I used some Chinese naked PCBs with fans on it up to 50 watts. I am very glad to leave them behind. Rigol? did not the 83x series have many odd issues in behaviour and stability? |
| JJ_023:
--- Quote from: Antonio90 on January 04, 2024, 07:15:17 am --- --- Quote from: JJ_023 on January 03, 2024, 10:28:34 pm --- --- Quote from: Antonio90 on January 03, 2024, 10:03:44 pm ---I have a GW Instek, a GPD-4303S. It works quite well as a psu, reasonably precise, stable, and reliable OCP and OVP, but cannot show the settings of more than two channels at once on the screen, and you have to turn on/of all channels at once. This last flaw is, by far, the worst. If I were to buy another PSU right now, it would probably be the one you are considering. There is custom firmware in this forum for the GPP, which improves readback speed, and accuracy? Can't recall right now. I would have a look at AIM-TTI supplies. They are also really precise, with sense terminals on the front, and simple interfaces. More expensive for the same features, and I don't think you will get two quadrant supplies for that budget outside of the GPP. The MX series from TTI look quite nice though. --- End quote --- Thank you for taking the time to respond. Not being able to show more than 2 channels at the same time might be a nuisance in certain occasions I don't particularly see that as that big of a nuisance. Can you control this on a PC screen? If I understand you correctly that is a big PITA. I see 4 buttons for channels. What are they for if you can't turn them on and off independently? I don't necessarily need the 4 channels but it is an appealing feature. I am not familiar with that particular brand I will have to do a little bit of research. Do you have a specific model you would recommend without getting into a different price bracket? --- End quote --- The buttons are for selecting which channel is receiving input from the adjustment knobs. About the screen showing only two channels, yeah, it is not too big of a deal, as there is a (rather simple) computer interface. This is all for the GPD I have, the GPP you are considering doesn't have any of those problems. The numbers are not as easy to read though. I was looking at the PL303QMD. But just saw in the datasheet that it has no computer interfaces unles you pick the -P version which is much more expensive. The QL355T is already quite a bit more expensive without interfaces. I don't think there is a better option from TTI at that price bracket, my apologies. --- End quote --- Thank you for the additional information. I looked at both of the models that you referenced. What makes you think any of those are better choices. They just seem more expensive. I am no power supply expert, so I am trying to figure out what I am missing from your suggestions. |
| JJ_023:
--- Quote from: nctnico on January 04, 2024, 11:33:25 am --- --- Quote from: flano on January 04, 2024, 08:37:28 am --- --- Quote from: JJ_023 on January 03, 2024, 10:12:04 pm ---Thank you for the data point. What is something that you don't like about the Rigol? I've considered that unit as well. --- End quote --- Nothing really. It only has 3 channels vs 4 for the GPP-4323, but that's not an issue for me. GPP-4323 also has an electronic load. The Rigol does everything I need, very happy. --- End quote --- IIRC the Rigol 930 series does not have seperate grounds for all channels. This could be problematic in some situations. --- End quote --- Could you please give me a few examples as a data point where that would be problematic? |
| JJ_023:
--- Quote from: 2N3055 on January 04, 2024, 01:11:54 pm ---Battery charging should be left to battery chargers. Battery chargers are cheap and common. --- End quote --- That is a very valid point. I still sometimes like to use a power supply to charge batteries especially 18650s above 1A. I also deal with odd size lithium batteries so sometimes it's a lot easier for me to custom fabricate a holder then have numerous specialty chargers. It's just a preference, probably not a good one. |
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