Show your favorite and most used benchtop PSU

[BravoV]

Lots of updates. 

Is it bad my most commonly used power supply is a $20 12v computer supply with a filter and adjustable linear reg(10-turn pot fuck yeah) attached to a multimeter? More accurate than $150 benchtops, and keeps my desk warm...

Where is the pic ?

As long it serves your purpose and you are fully aware it's limitation, its perfectly fine, you should be proud of it and nothing to be embarrassed, pic please.

[Rick]

Yea the meter or the leads would be disssapating 30W?

Yes, as you saw earlier he has special square cables for power dissipation (supposedly for heating his bench top) with apparently a resistance of 3,33 Ohms

Is the panal meter FU?

No it's the leads

[olsenn]

I love my Instek GPS-4303; albeit I rarely use the two non-current-limiting outputs. Plus have a look at the torroid coil in this baby!

[robrenz]

One of my (2) PD 2005A's also have (2) 2020B's and a 2010  most awesome power suppies. But my most used is the Mastech GPC3030D

[Monkeh]

I love my Instek GPS-4303; albeit I rarely use the two non-current-limiting outputs. Plus have a look at the torroid coil in this baby!

That.. looks exactly the same as the PSM series PSUs (look up, mianchen has a 3/5, I got a 2/2) on the inside.

[BravoV]

Yes, as you saw earlier he has special square cables for power dissipation (supposedly for heating his bench top) with apparently a resistance of 3,33 Ohms

Ha..ha.. I just noticed that square cables, looks very unusual especially in the electronic measurement domain. 

One of my (2) PD 2005A's also have (2) 2020B's and a 2010  most awesome power suppies. But my most used is the Mastech GPC3030D

I can see there is an oven lamp there and aware this is a precision psu, just curious if it needs to be turned on for quite some time to get the output stability ?

[Madsaaby]

Yes, as you saw earlier he has special square cables for power dissipation (supposedly for heating his bench top) with apparently a resistance of 3,33 Ohms

...   

[Ferroto]

my bench PSU is an ATX power supply.

[robrenz]

One of my (2) PD 2005A's also have (2) 2020B's and a 2010  most awesome power suppies. But my most used is the Mastech GPC3030D

I can see there is an oven lamp there and aware this is a precision psu, just curious if it needs to be turned on for quite some time to get the output stability ?

If it is plugged in the oven is on even though the power switch is off so you can use it instantly. If you plug it in cold it takes about 20 mins. to warm up.  They are incredibly stable as seen in this thread

[mianchen]

One of my (2) PD 2005A's also have (2) 2020B's and a 2010  most awesome power suppies. But my most used is the Mastech GPC3030D

Sexy! Too bad I've been lurking eBay for 6 months and never seen one or similar ones for sale in the UK.

[Jay_Diddy_B]

Hi,

Here is my favourite power supply. It is a HP 6554A.

Maximum voltage 60V

Maximum current 9A

Very Accurate.



Jay_Diddy_B

[robrenz]

The rest of the family:
2 PD 2005A, PD 2010,
2 PD 2020B
Mastech GPC3030D  Revlectrix 13.8V 28A switcher


Twins,  20V-10A 4 quadrant supplies.  Think a Mega Opamp with 20kHz bandwidth but capable of + or - DC output also.

[T4P]

I thought you would the kind of man to mill a new knob for the 4Q PSUs  , they look like a understatement and just doesn't have the look of the rest of the PSU 

[robrenz]

I agree but I would buy them.  I only enjoy making things I can't buy

[(In)Sanity]

After blowing the snot out of my previous PSU to the point that a new circuit board would be needed I opted to home brew.   My current single output PSU is not worth a photo.  It literally is all over the bench without a case.   It's 100% home brew from the ground up.  It originated in LTSpice and has worked it's way up.   Depending on the transformer I use it can do 2mv to 30 volts.    2mv at the moment due to LM324 op-amp.   The current limit is from 2ma to 6 amps or more if I want to use a larger transformer and driver(s). 

When done I'll have dual isolated outputs with 0-20 volts (or 0-30) @ 6 amps.  Current limited down to at least 1 ma and resolution of at least 16 bits.   It will have two identical supplies in one case with two inverted blue back-lit LCD displays.   The setting will be via speed sensitive rotary encoders,  one for voltage and one for current.   Chances are I'll toss in some 78xx regulators just for a few more outputs.   Because the supplies will be isolated it could be bridged together if needed.   I'm not sure I'll go for dual tracking however,  guess I could with some optical isolation

The displays will show voltage and current with 16 bit resolution as well as wattage and perhaps peak current from the last xx minutes.  Trying to keep it down to the 4 rotary encoders as well as main power switch and output enable switches.   

It will be a modular design with transformer followed by rectifier and main filter then a board for the regulator/current limit which will be feed from another board that does the LCD,  rotary encoders and DAC / ADC's.   This will be copied twice to obtain two supplies in one case.   I'm trying to avoid buttons for the moment.   Unless you have a machine shop home brew cases can be a bit annoying. 

[AlphZeta]

I got a Topward 6603A, dual 60V 3A power supply a while ago (did a teardown here https://www.eevblog.com/forum/reviews/topward-6603a-linear-power-supply-teardown/), and I really like the build quality.

I have since upgraded it by adding in a fan controller and I have also replaced the 2 100V 4700uF DC filter caps with 2 100V 10,000uF ones.

 

[sotos]

One from me also.

[BravoV]

.........I only enjoy making things I can't buy

This, had made a lot of fellows here ruined their keyboard because of excessive drool dripping on it when watching your excellent craftsmanship. 

Btw, I still drooling seeing that fine diy kelvin clips of yours. 

[robrenz]

Thanks, I am glad you guys are enjoying them. I have lots more to come.

[grenert]

Thanks, I am glad you guys are enjoying them. I have lots more to come.

Could it involve the second micro-ohmmeter I see on your rack?
You might be the first "ohm-nut" 

[robrenz]

It will be my double 8 decade resistance boxes. Lots of videos on all aspects of the design and construction.
I won't respond to any questions so to not get this thread any more off topic.  

[dimlow]

This is the best i can afford, i use the 9V battery when i need a stable supply.

[BravoV]

This is the best i can afford, i use the 9V battery when i need a stable supply.

Don't know why, I just don't believe that you can't afford better one if you really want to, after looking at those few "serious" big boxes beside your psus in the photo.   

Thanks for posting yours. 

[dimlow]

The big boxes where very cheap second hand units. The most expensive bit of kit i have it a Rigol DS1052E. I am looking at buying a konrad supply ( the one that busted in Dave's review), at least with that i will be able to set an output voltage digitally.

[PA4TIM]

Most used ones are 4, this Philips PM2811. Current shows -0.03 but that is fixed to at this moment.

Modified 1974 electuur powersupply :

The most cute:

Modified Delta 30V 10A

Besides that I have psus up to 2000VDC ( but they are 1 to 5 mA), a huge 50kilo box with no terminals but a few fixed (-6,12,18V and can be coupled to get for instance 24V by using -6 and 18. powerrails. Ex army, no clue about the amps but it should be very high, the former owner powered all his green transmitters and reciveivers from this one supply.
This is my "mean machine" own design dynmic load to get constant current, can do over 10A and about 30V if I want. There is a LM317 to set the voltage for the gates of 3 HEXFETs, the load is also 3 of those IFRZ256 the electronics regulate the voltage on top of the load. So it compenstates the coltdrop over the current regulator. It can be used as dynamic load  or for instance pulsating battery charger. The ugly cabinet was an old French noise generator. Stil worked but it was not very usefull. Pronably some jammer. It had in a test over 1000V output in a load and with only a short pin in my SA as antenna it was full screen beyond 1GHz. I use it a lot to cycle my back up batteries in my lab