Show your favorite and most used benchtop PSU

[T4P]

Hmm, that flat thingy with VFDs, what's that meter? Looks nice

[PA4TIM]

Just a photo of a Keithley 2000 display showing the output of the PM and photoshopped in the picture

[Jonny]

My only supply which doubles as a car battery charger. 3-30V 10A with overload protection. Pretty basic, and the multi-turn pot is cheap, has been cleaned once but got scratchy again in a short amount of time.

[mzzj]

Currently I have 8 of these (this is what I would call total overkill) 

+HP 6633A
+ Delta elektronika 300V 4A
+ old homebrew analog power supply

[jancumps]

Modified Delta 30V 10A

Ah, the legendary holland power supply brand. Good to see one.

[PA4TIM]

Yep, this is the SMPS version, and there support is great. If you have a 30 year old one and have a poblem and mail them for a schematic they send you one. I am active on a Duch foum and as soon as someone has a problem with a Delta ( very rare) the guys from Delta support log in and answer the questions them selves.

I love those HPs, i once almost bought one but one of the the problems was it had no banana terminals or other connections on the front.

Fred

[mzzj]

I love those HPs, i once almost bought one but one of the the problems was it had no banana terminals or other connections on the front.

Fred

Pretty easy to install by yourself. Just don't buy them from Agilent, they are bloody expensive as extra option. 6632B-series  have pre-made holes on the front, just stick a hole with a x-acto knife and you are good to go.

I love the 663xB series because of their ability to sink current and act as a DC-load. And did I mention accuracy 
For 120 euros they are absolute bargain in terms of accuracy and features.

[BravoV]

I love those HPs, i once almost bought one but one of the the problems was it had no banana terminals or other connections on the front.

Fred

Pretty easy to install by yourself. Just don't buy them from Agilent, they are bloody expensive as extra option. 6632B-series  have pre-made holes on the front, just stick a hole with a x-acto knife and you are good to go.

Confirmed, I've been stalking this series for quite sometime too, and most people like Fred, don't like it because there are no front terminals, but it can be modded. 

Check this Japanese page, the photos should be self explanatory -> http://blogs.yahoo.co.jp/ngydx785/13391785.html!

Edit : Check out this thread -> https://www.eevblog.com/forum/buysellwanted/hp-6632b-power-supply-electronic-load-in-uk/ , they've been buying like crazy there, two left / 25 sold.

[blackdog]

Hi,

This is the power supply i use most.
I designed en build this one last year and put it in one of the Cisco PIX 501 Firewall boxes.


Most of the electronic stuff i design is low power and the 30mA en 200mA
currend range is more than enough for most circuits i am testing.

And yes its stable, is uses a Apex VRE310a reference.
Take a peek @ the schematic


Regarts,
Blackdog

[Zapro]

Well i guess i'll have to show my PSU too. I have two PSU's and some variacs. The small PSU is just a cheapie like this http://goo.gl/KoPVj

Anyway, the "real" PSU is a Delta Elektronika SM7020 - 0-70V 20A 

I've tried to build some Nixie-based Voltmeter/Ammeter for the PSU, but never got it finished...

HOW to make pictures fullsize? i cannot find the button that does that.... It only shows the thumbnails...

[Circuitous]

Of these, I probably use the DP1308A (lower left) the most:


I just got this one yesterday, TTi QPX1200SP  1200Watts:

[c4757p]

Oldies but goodies.

[BravoV]

Oldies but goodies.

Assuming the mechanical parts are properly cleaned & lubed and also consumable parts like caps are refreshed with good ones. When every time I saw this particular psus, had a feeling that these oldies life might be longer than ours. 

[c4757p]

When every time I saw this particular psus, had a feeling that these oldies life might be longer than ours. 

Neither one is dated, but the parts inside are - the one on the left was made ca. 1964! Interesting to see how it was designed. The circuit board is FR4-style material, but with no traces - everything is wired point-to-point on turrets. Despite that, the layout is impressively clean and could pass for a modern PCB layout. Surprisingly few transistors for an all-transistor design (no ICs in this one, thank you very much!) with its specs. For some reason, they felt they needed rails near 100VDC for a power supply with a maximum output voltage of 20V... I guess efficiency hadn't been invented yet  They used such high quality parts that even all the capacitors are still in perfectly good shape. I did have to "adjust" a couple of the precision resistors in the divider, though.

[robrenz]

I did have to "adjust" a couple of the precision resistors in the divider, though.

What techniques are you using to adjust the divider resistors? 

[c4757p]

In one case, adding a tiny (0.5) series resistance, and in the other, a huge (22M) parallel. That way the bulk of the resistance still comes from the probably very stable resistors that are already there.

[robrenz]

To not derail this thread, could we discuss this further in my questions to you here  POWER DESIGNS PRECISION POWER SUPPLIES ?

[ecat]

Arrived today from ebay, Systron-Donner PQ20-2.
Here I have a couple of 10r resisters on the rear connectors.





The Bad:
Absolutely zero information about this or most other Systron-Donner equipment on the internet so, if it doesn't work you are in trouble.

The Good:
Absolutely zero information about this on the internet so, not very popular and therefore cheap, very cheap £17 excluding shipping.

Not had much time to play with it yet.
The two units can be separated from the rack making for a smaller setup.
The voltage can be controlled by an external 0-10V source - maybe the current too.
The current limit works as a CC source just as one would expect.
The on/off switch is on/off so no way of presetting current but...
Those pots on the front are 10 turn so I could fit a couple of counting/vernier type dials, I have a couple lying around.
A quick look inside reveals what appear to be six silver-mica caps per unit. Now, I know very little about electronics, but I do know you don't scatter silver-micas around just looks, they are not cheap.

All in all, quite a cute little bugger

[talsit]

This one is mine!

It's a Kikusui PAN35-5A, I bought it 2nd hand just 4 days ago, and I'm already liking it quite a lot. It does have a serious problem though - the fan is incredibly loud!

I haven't seen anyone else with a Kikusui, is it not available outside Japan?

[RickieSalad]

Mastech HY3005F-3

[BravoV]

It's a Kikusui PAN35-5A, I bought it 2nd hand just 4 days ago, and I'm already liking it quite a lot. It does have a serious problem though - the fan is incredibly loud!

I haven't seen anyone else with a Kikusui, is it not available outside Japan?

Finally ... a Japanese psu, looks like my Kenwood has a Japanese friend now in this thread !

Yep, Japanese's stuffs is rarely discussed here in this forum. 

[talsit]

It's a Kikusui PAN35-5A, I bought it 2nd hand just 4 days ago, and I'm already liking it quite a lot. It does have a serious problem though - the fan is incredibly loud!

I haven't seen anyone else with a Kikusui, is it not available outside Japan?

Finally ... a Japanese psu, looks like my Kenwood has a Japanese friend now in this thread !

Yep, Japanese's stuffs is rarely discussed here in this forum. 

Yeah, I was looking at the Kenwoods, but the only 2nd hand ones they had were 18V ones, and I needed 32V ideally. The Kikusui ones were quite pricier, and a lot more than I wanted to spend, but it was either this one, or a really crappy one rated only at 110V 60Hz (and in Osaka it's 100V 60Hz), and they had warning stickers saying that the full DC range won't work, only to 10%...

[BravoV]

Yeah, I was looking at the Kenwoods, but the only 2nd hand ones they had were 18V ones, and I needed 32V ideally. The Kikusui ones were quite pricier, and a lot more than I wanted to spend, but it was either this one, or a really crappy one rated only at 110V 60Hz (and in Osaka it's 100V 60Hz), and they had warning stickers saying that the full DC range won't work, only to 10%...

Hey Talsit, how much those 2nd hand used psu cost there ? Like your or Kenwoord, just ballpark number/approx. in US$ currency equivalent ?
Really curious at the Japanese market price there, especially for used ones, how bout others instruments like scope, dmm and etc ?

Btw, I'm assuming you're native Japanese, is it possible asking your help to find the Kenwood psu "service manual" like mine at the 1st post at maybe Japanese forums or mail-list ? I got the user manual already, opened it once and noticed its still using thru hole components, I guess its easy to repair, pretty please if its not troubling you too much. 

Fyi, all Kenwood's lab psus series is now owned by a company called Texio.

PS : Always felt dizy when reading google translation from Japanese -> English. 

[maca_404]

Talsit did you look at replacing the fan,  I had the same issue with a lipo charger I have and replaced the fan with a more quality unit and its quiet as a mouse now.

[talsit]

Yeah, I was looking at the Kenwoods, but the only 2nd hand ones they had were 18V ones, and I needed 32V ideally. The Kikusui ones were quite pricier, and a lot more than I wanted to spend, but it was either this one, or a really crappy one rated only at 110V 60Hz (and in Osaka it's 100V 60Hz), and they had warning stickers saying that the full DC range won't work, only to 10%...

Hey Talsit, how much those 2nd hand used psu cost there ? Like your or Kenwoord, just ballpark number/approx. in US$ currency equivalent ?
Really curious at the Japanese market price there, especially for used ones, how bout others instruments like scope, dmm and etc ?

Mine cost me 31500 yen (http://www.xe.com/currencyconverter/convert/?Amount=31500&From=JPY&To=USD). It's in really good condition, they had 3 from the same lab, all looked like they had been used, but taken very good care off. They also had 3 others, from a different lab, but these were older, and looked like they were put on a trolley (and sometimes, they may have fallen off a trolley!). I'm quite happy with it.

This is where I bought it from: http://techno.kyohritsu.com/keisokuki/index.html
They haven't updated that page for a while, but those are the basic prices.

Btw, I'm assuming you're native Japanese, is it possible asking your help to find the Kenwood psu "service manual" like mine at the 1st post at maybe Japanese forums or mail-list ? I got the user manual already, opened it once and noticed its still using thru hole components, I guess its easy to repair, pretty please if its not troubling you too much. 

PS : Always felt dizy when reading google translation from Japanese -> English. 

Well... you assume wrong! I just got here 2 months ago, with very very VERY little japanese skills. So it has been an interesting experience so far. But yes, I can't really help you search for that unless it's through google translate!!