Products > Test Equipment

Topward 6603A Linear Power Supply Teardown

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AlphZeta:
Here are some teardown pictures of the Taiwaness Topward 6603A (dual 60V 3A and 5V 5A, CC, CV, Independent/Tracking/Parallel/Series) I bought from eBay:

This particular unit was made in 97. The oscilloscope images corresponds to the power-on characteristics of

1. no load maximum output voltage
2. no load lowered output immediately after maximum output voltage
3. load under CV
4. maximum load under CC

From the build and the power-on characteristics, it appeared to be a pretty good unit. I have a more in-depth review on my site (http://www.kerrywong.com/2012/12/01/topward-6603a-linear-power-supply-teardown/).

Shuggsy:
Nice! Looks like a pretty good unit. About the only complaint I've had about the (quality) far east supplies is that the soldering/assembly can sometimes leave something to be desired. Usually that's a quick fix if you take it apart and examine any offending bit. This one looks to be well built and easy to service if needed. Very cool! Nice scope captures, too!

Love the analog meters. :)

saturation:
A nice supply, its well made, Taiwan stuff is, by name alone, likely very good :-+ .  The brand is not familiar but ebaying it I find its a pretty prolific in the used market.  Its a name worth remembering for the future.

T4P:

--- Quote from: Shuggsy on December 02, 2012, 04:58:10 am ---About the only complaint I've had about the (quality) far east supplies is that the soldering/assembly can sometimes leave something to be desired.

--- End quote ---
Huh? The soldering is fantastic and i've seen american made stuff soldered WORSE. Well actually taiwanese even these days and those days take pride in their stuff and didn't attempt to cut cost left and right

ptricks:
soldering looks okay, they could have cleaned the flux off the board though. The only thing that really bothers me about that supply is the organization inside the case, too many wires for what the circuits are doing like someone just added boards and if it didn't fit here, they said'  oh we will just stick it here' . The wiring setup will make troubleshooting problems a pain.

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