Which of these 2 bench PSUs would you buy?

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jimk04

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Joined 2018
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#1
These two are in my watch list and wondered what everyone thought of them and which you'd go for.?
The Thurlby is British made, spec says 2A but the readout seems to be showing over 3A.
The Iso Tech seems to be a clone like many, but with schematics seemingly ready available if maintenance required.

Or anything else out there within £150 recommended?

https://www.ebay.co.uk/itm/12700077...aV1Cg3-Rh-&var=&widget_ver=artemis&media=COPY

https://www.ebay.co.uk/itm/17698966...aV1Cg3-Rh-&var=&widget_ver=artemis&media=COPY
 
#2
That Thurlby is quite old, so it might need new electrolytic capacitors. But it's a linear supply and quiet. However, a common failure mode is to go to full voltage. I don't know anything about the other supply, but it looks a lot newer. See if you can find one of the later TTi supplies in beige; they're really nice to use. When the output is switched off, the current display shows the current limit, and when the output is switched on, shows current drawn. I've used these supplies at work and at home and like them,
 
#3
I have one that looks like the first one .it can leave 5A per rail it has the abillty to drive serial +-60v and paralel.30v 10A I think
And it has an extra rail for 5v static.Shortcut protektion.I like it allot..
 
#4
Neither, as they don't have analog meters. Really difficult to interpret fluctuations with digital only display on the current, and current fluctuations are what you are looking for most of the time. Digital displays are only meaningful when they stop changing.
 
#5
The 1st link is/was mass produced under many names and model numbers. I have a Chinese version of it running fine for about 10 years. I bought it new in the box for less than $300 CAD. I use it all the time and it has enough power to test amplifier boards into 8 ohm loads. Gets the job done.

The 2nd unit looks more 'professional'. I know nothing about it. I would like to have one to check it out.

Both units, working, are good enough for my requirements.
 
#6
For me, the argument for a power supply having analogue meters is that the resulting supply is quieter. All those digits flying around add a lot of interference to the supply. I'm in the process of making a low-noise supply and it will have a nice Ernest Turner moving coil ammeter to read <10mA or <30mA. There won't be a digit in sight.
 
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