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Binding posts for Korad KD3005 Power supply.

P

Perry

Ultra Member
Picked up a used Korad KD3005D power supply at an auction. I noticed the binding post nuts were missing before I bid. What I failed to notice was the binding posts had been soldered back together as they had been broken off.

I'm not sure what you call these binding post as they mount a little different then the panel face style. These have a short stand off which is threaded on the back side. Not knowing the proper name is making it hard to find the style I need. Any ideas on the name?

As a back up idea, I thought I should be able to make these. What would the best material be to make a binding post from? Brass? Suggestions?

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Make posts with copper and then tin with silver solder for corrosion resistance. To get the best finish would require some research and prep. Never tried it myself.

Obviously, brass is stronger but less conductive. Still should have a corrosion resistant finish.

The biggest concern is durability and safe design.

You could easily purchase better quality posts than what it came with but I realize that's never as fun as DIY. For example:

 
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Just looked up that power supply online. Unless I am not seeing something correctly those posts are not original which might explain the style and damage. Missing plastic insulated covers or did you remove them?

Seeing that makes me wonder if anything has been modified/repaired inside. Have you opened it up and peaked inside?
 
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Elektrishun said:
Just looked up that power supply online. Unless I am not seeing something correctly those posts are not original which might explain the style and damage. Missing plastic insulated covers or did you remove them?

Seeing that makes me wonder if anything has been modified/repaired inside. Have you opened it up and peaked inside?
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I have opened the unit up and I do believe these are the original posts. The plastic covers (knobs ) on the posts were missing.

I have attached a similar photo of the same unit off ebay. I did notice the standoff for the chassis ground appears to be smaller then the one in the ebay photo.

The original posts have a standoff the fits into the power supply front panel hole cutout. They are secured to a PCB board from the back side with a screw. (they are not front panel mount posts).

Most of the posts I can find online are a panel mount style that are secured to the front panel by clamping from either side of the front panel. They have a threaded stud on the rear of the post. The insulator that would squeeze up to the front side of the panel needs to be a metal standoff to fit into the hole cutout. (Red arrow in attached photo.)


I would prefer not to go the DIY route if I can purchase the PCB mount style.

Reached out to Korad in Shenzhen Friday night and was surprised to get a reply back in 30 minutes. They are going to check if their U.S. supplier has the parts for me. This might solve the issue.

Thank you for taking the time to help me.

Screenshot 2026-11-09 at 05-50-57 KORAD KD3005D DC POWER SUPPLY 0-30V 0-5A eBay.png
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Perry said:
Korad KD3005D power supply
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Is that a good brand? I am unfamiliar with power supply brands. I see on youtube some people are building bench power supplies from old PC power supplies. Is that a reasonable idea?
 
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