New Power Supply review Tekpower TP3005D-3M - Page 1
Forum section: electronics / testgear

author: Pontisteve
author_rank: Newbie
timestamp: April 02, 2016, 10:53:41 am
content: Hi guys, I bought a new power supply and wanted to share what it looks like on the inside with you all. You guys probably know a lot more about electronics than I do, so please let me know what you see here, and what you think of the quality of this thing.The unit is sold by Kaito Electronics in California, thru Amazon. It's 30V, 5A, two channel, and has a 5V 2A USB third channel. It has a power button and a output on/off button. The two channels can be run in series, in parallel, or independent. The 5V 2A USB is fixed. It's a decent looking device, and doesn't look overly cheap. The back is matte black paint, marked made in China on it.Here's what I see inside:Transformer has fshrs.com on it, and part number appears to be RS1335-5V2A-110/114X50.Large capacitor is Nippon Chemi-con 63v 4700uf KMH 105C.Small capacitors are branded WKXC, and are all 105C.Small relay looking things are branded Yuyihon.There's a chip marked LM324N 5183Y that appears to be made by Fairchild Semiconductor.There's a regulator marked L7805CY that appears to be made by ST Microelectronics.The big resistors are a grayish color, and have a gold stripe on the bottom (5% tolerance).The pots are all single turn, course adjustment.All the regulators have thermal paste and are affixed to aluminum heat sinks.The large regulators are pasted and screwed to a really large finned aluminum heat sink that has a ~4" single fan behind it.The fan exists out the back middle of the case.The case handle is supported by a brace down the middle of the inside, and is rigid. It does not warp the case when you grab the handle and shake it a bit.Everything that has an adjustment screw has red glue on it to keep it from changing adjustment.Every plug is hot glued together.All the wiring is nicely routed and zip tied together well.There is a 110/220V switch on the back. There appears to be a fuse inside a black plastic cover on the plug receptacle, I think.Everything looks pretty good inside, but I'm not as sure about the solder joints. Some of them look "not done by a machine" for sure.Here's a link to a picture slideshow.http://s70.photobucket.com/user/pontisteve/slideshow/Tekpower%20TP3005D-3M%20Power%20Supply

author: charlieb83
author_rank: Contributor
timestamp: April 03, 2016, 08:17:50 pm
content: Hi, I was actually thinking about getting a Tekpower power supply also.I was looking at the one here (but I'm also considering the one you have):http://www.amazon.com/Tekpower-TP-3005D-3-Digital-Variable-Linear-type/dp/B00HX0UYBKWould you mind posting back after having used the supply for a bit to tell how your experience with it is?Thanks!

author: Pontisteve
author_rank: Newbie
timestamp: April 04, 2016, 06:13:02 am
content: I began by looking at that same one you did, at a friend's recommendation of his Mastech. After a little research, I found that it had no frame support for the handle, so lifting it with the handle causes case warpage. It doesn't have an output on/off button like this one. And the new one switched over to a 5v 2a USB port instead of a 5v 3a fixed output. I'm not sure if this one is better on the inside of not. I was hoping some more experience electronics enthusiasts would be able to tell me more about the guts. It seems decent to me, although I don't know if this transformer is better than that round one in the older version of not.I don't have much use for it right now, so I probably can't put it thru much of a test yet. But I will post back when I do. Hopefully someone in here will chime in about the parts used inside.