Advice on choosing a powersupply in the UK for ~£100

[chris9000]

Hi,

First of all if you think this question has already been answered please delete, I have been searching
through a number of posts which gave me a number of PSUs to look at, but would appreciate a little advice.

I've mainly been looking at this PSU:

PL310QMD - https://www.ebay.co.uk/itm/Thurlby-TTI-PL310QMD-Variable-bench-power-supply-twin-channel-32V-1A-quad-mode/113431537365 - I believe I can use it to generate say -2.5V and 7.5V (I'm looking at powering an ADC board to begin with)

I was also searching ebay for HP PSUs but couldn't really seem to find anything in my price range.

Cheers!

[nctnico]

That one doesn't seem bad. I'd probably replace the seperate fine/coarse potmeters with a single 10-turn potmeter to adjust the voltage. Maybe you can ask the seller if he is willing to drop the price a little. He seems to have plenty for sale.

[wraper]

That one doesn't seem bad. I'd probably replace the seperate fine/coarse potmeters with a single 10-turn potmeter to adjust the voltage.

FWIW with 2 pots you can make adjustment much faster. It's a pain when you need to turn pots many times to set different voltage. And still difficult to set voltage as fine as with 2 pots.

[james_s]

Looks like a decent unit, a bit bulky but if that's not a problem for you it seems like a reasonable deal.

I also prefer separate fine/course pots, having used both arrangements on PSUs the separate knobs are much more convenient than twirling a 10 turn pot around and around.

[beanflying]

Lucky there is a few of those available. Posting eBay links to nice old boat anchors will see the agents of TEA breaking open their piggy banks and checking the back of seats for coin to add to their stash

A very usable supply btw just consider the size of the Anchor you are buying and if it will fit your dinghy

[mk_]

PL310QMD - https://www.ebay.co.uk/itm/Thurlby-TTI-PL310QMD-Variable-bench-power-supply-twin-channel-32V-1A-quad-mode/113431537365 - I believe I can use it to generate say -2.5V and 7.5V (I'm looking at powering an ADC board to begin with)

you will find your selection here for £75
https://www.eevblog.com/forum/buysellwanted/fs-used-test-equipment-new-rigol-units-all-at-must-sell-prices/msg2000315/#msg2000315

[jpb]

I have the TTi PL320QMD - I bought it several years ago for £160 as new old stock.
I've been very pleased with it and it is still the supply I use for practically everything despite having an Agilent, a Hameg and just acquired a Keithley 2303.

It is quiet both electrically and sonically (if that is a word). The meters are pretty accurate, it has remote sensing.

The only down sides are it is not programmable (this has never bothered me as I set things manually anyway) and it is large and heavy but not too bad - it is quite shallow so sits at the back of the bench ok.

One thing though, the one you're looking at is only 1A and I think I'd find that limiting. You can double the two sources to double the current but then you only have one output. For most electronics 1A is plenty but I like to play with OCXOs and their heaters can draw well over 1A as do Rubidium oscillators.

[chris9000]

Thanks a lot everyone for your very helpful replies!

mk_ - thanks for the heads up, just sent them a PM.

The lack of programmability doesn't really bother me too much I don't think

That's a good point about being only 1A jpb, I've actually got a rubidium oscillator too

I'll have a look on fleabay to see if there are any slightly more powerful TTi power supplies.