Bench Top Power Supply?

[damnesia]

I bought this at a estate sale on 50% off day ( along with a SK 42470 that looks like it's never been used ). Certainly looks like an old bench top power supply but I don't see where to plug in the ground probe. Any ideas?

 

[cvairwerks]

Bet you that all the output terminals are on the backplane...

 

[oldtools]

Nice score. That is a high quality power supply. I believe all the connector should be on the back.

 

[StillTooManyHobbies]

All the outputs are probably on the back. The holes on the front are for fuses, and fuse holder covers which appear to be missing.

A little company history: http://techobsessed.net/power-designs/

Your model number appears to be pre-1996, according to the site. Do a search for "Power Designs Inc." and you'll find what's out there.

 

[damnesia]

Thanks for the info, I'll check it out later today. I'll upload a picture of the back, although the cover is missing. I got it for $7 and got the ratchet for 3$. Small, but good, haul.

 

[damnesia]

Here is a picture of the back. The cover is missing and I'm trying to find out where the ground would plug in. I'm guessing it has something to do with the 3 things on the back one of the units but I'd really like to be sure.

 

[damnesia]

All the outputs are probably on the back. The holes on the front are for fuses, and fuse holder covers which appear to be missing.

A little company history: http://techobsessed.net/power-designs/

Your model number appears to be pre-1996, according to the site. Do a search for "Power Designs Inc." and you'll find what's out there.

I missed the first part of your post. I think you are correct and I need to get some fuse covers. I can't find any information on this particular power supply. I can't find one that even looks like it. Figuring out what I need to wire into on the back is going to be difficult, since the back plate is missing.

 

[StillTooManyHobbies]

Fuse covers should be just like the others on the front. On the back, left is the AC input, right will be the outputs. Most likely, the ground connection will be either the top or the bottom, then get out the meter and go from there. You might look at their newer models to see if there is any similarity. Be aware you might have both + and - outputs when referenced to ground.

 

[damnesia]

Fuse covers should be just like the others on the front. On the back, left is the AC input, right will be the outputs. Most likely, the ground connection will be either the top or the bottom, then get out the meter and go from there. You might look at their newer models to see if there is any similarity. Be aware you might have both + and - outputs when referenced to ground.

Thank you for your reply. If you have a chance, can you please expand on:

Most likely, the ground connection will be either the top or the bottom

Do you mean the right bank of terminals on each unit? It looks like the top and bottom parallel screws secure the terminal blocks to their board. Do i check all the screw terminals that have the single screws with a meter?

 

[Citation]

The plug on the from might be something like a headphone plug where each is located behind the other. Also, I assume you mean negative, not ground. Ground (earth/chassis) and negative are often tied together but not always. My bench supply has a floating output thus I can tie ground to +, - or just let it float.

 

[damnesia]

The plug on the from might be something like a headphone plug where each is located behind the other. Also, I assume you mean negative, not ground. Ground (earth/chassis) and negative are often tied together but not always. My bench supply has a floating output thus I can tie ground to +, - or just let it float.

You're correct I do mean negative, not ground.

 

[damnesia]

I can't find enough info to feel comfortable probing around for the + and - output for the probes. Bumping up the thread to see if anyone has more advice.

Thanks.

 

[pstemari]

Looks like the AC is already hooked up with a cord on the left and daisy-chained connection to each unit.

I'd replace the fuses, plug it in, and check the right-hand terminal steps with a DMM. I'm guessing the top three terminals will be positive and the bottom negative, but it should be easy to confirm.

Sent from my Nexus 6 using Tapatalk

 

[damnesia]

Thank you. That is enough enough to get me started. I wasn't expecting it to have multiple positive and negatives outputs for each.

 

[dogdog]

Those seems to be 3 different independent modules, pretty sure you can unscrew the front 4 screws and pull the module out and have a better look/trace that output of the variac... might have more than one output.