Show your favorite and most used benchtop PSU

[ResR]

My two power supplies, one with unregulated ~12VDC with 50VA transformer, i put the fan to cool it, but it's noisy and other is basically a 1990's PC PSU turned into regulated +5V and +12V power supply. Both were built when I was 17.
Edit: nice work Deckert, looks like authentic PSU._

[Deckert]

By the way: Nice work Deckert, the power supply looks realy great with the analog panel meters!

Thanks Alex!

@BravoV: yep, agree with you, it does look more classy. But they both work equally well and the LCDs are at least accurate enough. I've ordered two 10x multi-turn potentiometers from RS for the left-side of each PSU to allow for more accurate adjustment, should the need be there.

That switch-mode supply is quite rare - at least in my experience. Very nice though, compact and light.

After Dave's video about common mode noise, I measured mine. My results echo Dave's in that the noise remains the same whether the supply is on or not. I didn't trace the noise to anything specific, but there's just too much kit in my lab that I don't want to switch off right now. In any event, it's not bad enough to warrant finding the source (but my LED light strips are all linear powered!

--deckert

[afho]

After Dave's video about common mode noise, I measured mine. My results echo Dave's in that the noise remains the same whether the supply is on or not. I didn't trace the noise to anything specific, but there's just too much kit in my lab that I don't want to switch off right now. In any event, it's not bad enough to warrant finding the source (but my LED light strips are all linear powered!

This is also my experience: At work we have realy big thermal chambers and when the thermal unit is ON to regulate the temperature ... you can see "anything"  on your signal wires. This is the reason why we turn the thermal units OFF to make our measurments . Our luck is that we, mostly, measure digital signals secured with CRC, so we notice when something went wrong.

[staxquad]

how about some AC

1-Variable isolated AC power supply 0-150V
2-AC automatic voltage regulator
3-Variable AC power supply 0-8V
4-step up transformer 120V to 240V

[BravoV]

The BK Precision 1655 looks interesting,  as an adjustable AC psu, its also as a leak detector, must be really handy.

[kripton2035]

sorry the bk 1655 only exists in 110V - no 220v version for europe ?

[Alex]

Power bricks  I most regularly use the Agilent one, very quiet electrically but that fan... . The two HV ones are used for vacuum tubes and nixies. The TTi is for the higher power loads.



Alex.

[Joules]

Here's my little Kenwood, had it many years. 

[Slowflyer]

I have an Agilent 6632B and i love it!
I don't need another multimeter because its great voltage and current readouts.
Many people say that it's too loud, but i don't have a problem with the sound it makes. The transformer hum is awesome.

The bad thing in this supply is its slow constant current regulation as it's mainly designed as a constant voltage supply.
It's not that bad if you are familiar with its properties, but in theory it could provide many times the voltage for tens of milliseconds.
It says in the manual that to get around this problem, you have to short the output so it goes to CC mode, connect the load and then remove the short.

[M0BSW]

 I have two had both for a while, on the left Farnell D302 variable power & current 0 to 30 v 2 Amps .. one to the right 0 to 14.5 volts variable 30 amps.

[eKretz]

Here's mine, it's my first:

[nctnico]

This is a bench PSU I made in school when I was 15 or 16 or so. Its over 20 years old by now. Even though I have several other PSUs I still use it regulary because its nice and compact. I'm trying to retire it but I can't seem to decide on a proper replacement.

[robrenz]

This might become my new favorite because of the wide range.  $75.00 shipped from the buy/sell section here.

[BravoV]

This might become my new favorite because of the wide range.  $75.00 shipped from the buy/sell section here.

I guess its official now that you're known as the "Power Designs" psus addict. 

[c4757p]

It's a contagious addiction, too. He's infected me.

[robrenz]

There are worse things you could be addicted to

[duskglow]

Here's mine.  It's an LQ-534 0-120VDC 1.7A supply I got at Surplus Gizmos for $70.  It's so far one of the best purchases I've ever made.  Someday I'll get something fancier to supplement it but this thing's a workhorse.

Interestingly, it has a terminal bar on the back that is exposed to air.  The power cord is connected to it.  I had to put some electrical tape on it to protect me and the cat.

[SLJ]

Since I scored that Power Designs a couple of weeks ago I know I won't pass up another one.  The thing is rock steady and has virtually no AC ripple  (about 1 mv)  across its entire range.  Now I'll be watching for a 5 amp version and one of the precision ones with an oven in it (their cool looking).

[robrenz]

What are you waiting for?  its right Here. Thats where the one I posted above came from.

[SLJ]

What are you waiting for?  its right Here. Thats where the one I posted above came from.

The front panel on that one looks a little beat.  I will probably find one cheaper at a swap meet this summer.  Not in a hurry.

[gerrysweeney]

I have two E3631A's, one is HP and the other is Agilent branded, I have other PSU's too but I use these two PSU's all the time.



Gerry

[robrenz]

What are you waiting for?  its right Here. Thats where the one I posted above came from.

The front panel on that one looks a little beat.  I will probably find one cheaper at a swap meet this summer.  Not in a hurry.

Thats just great, you are no help at all    Now I am going to be tempted to buy it so I would have a pair to use in parallel or series together. 

[SLJ]

What are you waiting for?  its right Here. Thats where the one I posted above came from.

The front panel on that one looks a little beat.  I will probably find one cheaper at a swap meet this summer.  Not in a hurry.

Thats just great, you are no help at all    Now I am going to be tempted to buy it so I would have a pair to use in parallel or series together. 

You know you want it. Do it.

[fpliuzzi]

What are you waiting for?  its right Here. Thats where the one I posted above came from.

The front panel on that one looks a little beat.  I will probably find one cheaper at a swap meet this summer.  Not in a hurry.

Thats just great, you are no help at all    Now I am going to be tempted to buy it so I would have a pair to use in parallel or series together. 

The front panel on that second 6050A does look a bit beat up (for now), but for $70 including shipping, I couldn't resist. It will make a nice companion for my HP6228B, which is my most used PSU. I like the fact that the 6050A can supply up to 5A when set to its 0-7V output range.

Regards,
Frank

[don.r]

Now that I got it, the most used is the Power Designs Precision 2020B in the middle but the converted LM317-based tattoo supply up top comes a close second.