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Show your favorite and most used benchtop PSU
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BravoV:
While doing minor cleaning & housekeeping on my bench table, when I was arranging things & moving stuffs around, was a bit struggled when I lifted my favorite and mostly used bench psu which it's weight about 14 Kg / 31 lbs :phew:, then suddenly remembered that this forum has no bench psu thread like the popular one "Show your Multimeter!" thread, took snapshots and here we are.

If you have more than one or too many like Dave does >:D, just post one or two that you "mostly used" when you're tinkering with electronic projects/circuits. Presumably its is adjustable type, and diy type is also welcome.  :-+

Please, post & share the photo of yours, and your own comment about it as well.


Let me start mine,  a 36 volt 10 Amps Japanese linear bench psu Kenwood PD36-10AD (Link), probably made around late 80s or early 90s.

Like :
- The auto emergency shutdown feature (crowbar ?), if the voltage rail crossed the adjustable OVP limit, the power switch will snap mechanically to off position instantly.  :-+
- Very low over shoot in CC mode when turning ON the output, it won't toast a led like the example attached photo below, really love this particular feature. Remember, this is a 10 Amps capable beast.

Dislike :
- Its so damn heavy and did I say its expensive ?  :'(  ... looking at the back of my shoulder just in case wifey is peeking  :-DD
- Although its working perfectly fine, but still feeling uncomfortable cause there is no service manual available like those cool & great HP (Agilent) bench PSU series.  :--


Front & rear shots, the rear has all those terminals for many features like parallel/series connection, remote sensing, external reference (volt or resistance) for voltage and current loop, remote output on/off and etc.


Now, your turn.

.

PS : Please, resize the photo like 1024 or max 1280 pixels wide, not the raw huuuge sized photo directly from your camera. Also its highly recommended to use the attachment feature to embed photo in your own post like I did here, rather than using external hosting, why ? A nasty example on the 1st post, image at external hosting simply sucks -> HERE
The attach picture feature is right below the dialog box where you type your post.
grenert:
I have some bigger and better power supplies, but I use a tiny little folding table as a "bench," so this is the one that sits there most of the time.  It is an HP 6236B triple output supply.  It is + and - 0-20V tracking (goes up to +/-25 V, but not spec'ed at 25 V), with an isolated 0-6V.  I replaced the little knobs that it originally had with some larger ones to make fine adjustments easier.  It has what HP called "current limiting," but if you look in the schematic, you can see that that limit is actually adjustable to some extent by internal potentiometers I've highlighted.  I removed the original trim pots and brought the PCB connections up to locking Clarostat trim pots I've mounted on the top panel.  It allows adjustment from 0-750 mA on the 20V channels.  The supply is spec'ed to 500 mA on those channels, but it is fine for at least a little while with higher currents.  Practically everything I use it for is low current, so most of the time I actually have it turned down to about 200 mA.

EDIT December 21, 2012:
Added another picture with my latest mod.  I inserted a couple of thin PCBs with white SMDs over the meters to provide an illuminated display.  They are powered by the +7.5 V and -12.4 V reference supplies, giving about 20V for the LEDs.  They draw only 20 mA, so no effect on the performance of the supply.

I also have an Elenco XP-720K that has a special spot because I built it myself (and modified it with 10-turn pots and a relay to turn outputs on and off), but no pictures here because I don't want to hear the litany of complaints that you can't build a bench supply with the LM317!
raymohi:
My Korad KA3005D. It suits my needs.
leniwiec:
Not my best but most sentimental one. Early 80` DIY psu, 0-80V 600mA. No abs/pcv at those days, knobs/meters and front was made from ebonite ;-)
BravoV:

--- Quote from: grenert on December 10, 2012, 01:31:46 am ---I also have an Elenco XP-720K that has a special spot because I built it myself (and modified it with 10-turn pots and a relay to turn outputs on and off), but no pictures here because I don't want to hear the litany of complaints that you can't build a bench supply with the LM317!

--- End quote ---

Yeah, there are swarming psu Nazis lurking around here that will bash every adjustable bench psu built from LM317 to death.  :-DD
Heck, let alone the LM317, infact when I started my electronic hobby long time ago, I used 7815 and 7915 chips and made them into "adjustable" pos and neg supply and it served me well.


@leniwiec,

Wow, ebonite panel, cool classic diy look and the retro style.  :-+
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