Wow, that WAS a steal!!! They are asking between $300 to a GRAND for these supplies! I have had one on my wish list as well.

These Kepcos are great versatile tools. My local components store here in Las Palmas has a Kepco like this on their shelves and no one working there knows what it is.

I have the 6825A, it;s a nice tool. knobs were all stuck on mine but a bit of heat applied to the shafts loosened thim up and they have remained fine since, which is good as these things are not built to easily service the rotery swithces.

damnit, now i want one

What a cool unit! Thanks for the demo.

That is a neat device actually, I bet it is a great tool when working on amplifiers too when you design various stages in it etc. nice

wow, now that is nice! Thinking about how it works is making my head hurt. Its basically a programmable precision audio amp with controllable gain and active current limiting. I want one but i'll never be able to afford one. $65 is a steal! An LED 7 segment frequency meter on the front would be useful as the analogue meters obviously can't respond at high frequencies.

My favorite power supply now is Kenwood PD-18 30AD. Not vintage but the power is amazing.

Awesome steal, pure robbery !....cheers.

Nice piece of equipment. Minor niggle, it feels very wrong when you talk about "amperage" what's wrong with using "current"??

That is not four quadrant operation, nor was it sinking current in the normal sense. A proper four quadrant supply will act as an active load, which it may be capable of, but you didn't demonstrate that.

Not seen one like that before, now if only i had a use for one it could be very useful. I've 3 switching PSU's which are good for lots of power in a small case, but if your doing ENC work you can't beat a analogue supply with an analogue meter, for low RF noise getting in to the test setup from your supply. Even the analogue ones with the led meter can be a bugger for noise.

Very cool. Never seen one before.

-50 amps!! No wonder it's sought after 🤣

TEARDOWN !

My first thought was just buy a Crown DC-300.... After checking epay prices, no don't.

i must get one of these,,,

Nice! I'm quite jealous. :) I think you meant to say 50 'watts', not 'amps' at 3:28. Also, at 8:53 and 9:07. I think you meant to say 'triangle' wave, not 'sine'.

Really sweet! I love the sandy texture of the cast metal body. I have an old HP power supply with the same body panels and same banana jacks. The meter movements on mine are stuck at 0 volts though! I am wondering if it's worth it to crack the thing open and try to fix them.

Very heavy, but often very low on noise. As opposed to SwitchMode noise generators. Hhhmmm that could a good item. How to clean-up your SM DC output. 🙂

OK, do you supply napkins with this video so all of us viewers can wipe up our drool? Now I have to find a schematic to see how they do this magic.

Is this really a four quadrant supply? If the voltage and current have the same sign, this can be at most a two quadrant supply.

Up to 40khz, that's nice.

You can do a video calibrating the zero adjust...:) Mine costs 250€ each with sipping to spain, and they were not working

I love your channel but it's often difficult to listen to on headphones, as your voice is coming from one side. Perhaps consider recording in mono. Keep up the great work!

How does it sound as an audio amplifier?

I have two of them, one for 120V and other for 24V and I use them instead a regular power supply ,why? they dont have a electrolitic outuput capacitor, not capacitor discharge when you do the things bad. They can be used as a battery simulator too. Is a very usefull tool

Will this replace my McIntosh MC-1200? Its got two meters on it! Ha! Woulda been cool to see it hooked up to a speaker, and play your Iphone thru it.

Is that like a SMU type device without the amplifier part ? Source Measurement unit is a (4) quadrant device I think...

Do you know the way to San Jose?

At 3:40 in, the instrument has not been demonstrated to be capable of sourcing or sinking current or operating in four quadrants. It has only been shown to operate in quadrants 1 and 3, sourcing only in each. No "sinking" capability has been demonstrated. "Sinking" means that instead of current flowing out of the output terminals, it can flow in to maintain the voltage setpoint. The specifics of polarity of the setpoint are essentially ignored with this terminology. Considering the case with the supply set to deliver a positive voltage at the "red" terminal relative to the "black terminal" : An ordinary power supply will go high-impedance at its output if something external to the supply forces the output voltage to be above the setpoint of the supply. With current sinking ability, the instrument will actively try to bring the output voltage down to the setpoint by causing (conventional) current to flow into the red terminal - it behaves as either a series regulator or a shunt regulator, depending on specific conditions. That is operation in quadrant 2. With the relative polarity of the terminals reversed, operation is in quadrant 4. The non-square limitation in quadrands 2 and 4 is almost certainly due to the safe operating area limitations of the output transistors. Because sinking is to the opposite supply rail, the voltage across an output transistor could approach twice what it might see if used only as a normal series pass element. Basically these power supplies are very very similar to audio amplifiers, the major difference being that they incorporate a bipolar voltage reference and some convenient bells and whistles.

how hard can it be putting a current limiting circuit into a powerful audio amp and call it a psu

Didn’t anybody notice the the price on the sheet? $3,875 🤯. Was that in 80’s dollars? 😱. Don’t you have a Keithley source meter? Doesn’t that do the same thing and is far superior?

is there a way that i can contact you ? i am selling some old equipment of our company, they are bunch of controllers, sensors and etc. for ultra high vacuum. maybe you know a buyer or u r interested