Cheap/simple dual power supply kit recommendation?

[antknee]

I was wondering if someone could recommend a cheap and realiable kit to build a dual power supply?

I have been looking but the ones I found were either outside of my budget, didn't match my spec or for example didn't include a mains transformer. I realise I could make my own, but it would be something of a labour and I'd prefer to find a good kit.

I would like +/-40V, 1Amp, mains transformer included.

Thanks.

 

[Sceadwian]

What's your budget?

 

[antknee]

Let's say - £40 ($60).

 

[colin55]

Do you want it adjustable or fixed? Do you want it current limiting?

 

[antknee]

Fixed and it doesn't need to be current limiting. On both of those aspects I'd just look for the price.

Thanks.

 

[cowana]

How smooth does the supply need to be under load? What ripple is acceptable?

A

 

[antknee]

Whatever is industry standard. I haven't thought about that in detail.

Thanks.

 

[cowana]

What is it to power? I am wondering if you can make do with transformer, bridge and caps, or if you need a switching setup. What it the tolerance on the 40v?

 

[antknee]

It is to provide power to an audio amp. Currently I'm using batteries, but recharging them is a nuisance.

I have thought about using transformer, bridge and caps. The problem was finding the right mains transformer. They seem to be about £20 on their own.

I don't actually know what a switching setup is...I could probably get away with +/- 20V at 1A

Thanks.

 

[Sceadwian]

You're not going to find transformers for much less than that, even used let alone an entire power supply that meets your specs. You're going to have to rethink your budget, or get lucky finding something dirt cheap somewhere.