Why are power supplies so expensive?

[ctdctd]

I am looking for 16VAC 1000mA and been googling for last half hour trying to find a cheap alternative. Maplin throws up links on Google but they appear to be red herrings.

This would probably work - it gives 15VAC at 1000mA but the voltage is not regulated so it will be higher at low current drains. Probably be OK unless whatever you are trying to power draws the full 1000mA all the time.

[DimPrawn]

This would probably work - it gives 15VAC at 1000mA but the voltage is not regulated so it will be higher at low current drains. Probably be OK unless whatever you are trying to power draws the full 1000mA all the time.

When you plug it in, make sure you get the polarity right! Some are positive centre contact and others are negative. Get that wrong and you might see smoke!

[ctdctd]

When you plug it in, make sure you get the polarity right! Some are positive centre contact and others are negative. Get that wrong and you might see smoke!

FAIL - AC output adaptors don't care about polarity. It only matters for the DC ones!

[xoggoth]

16VAC 1000mA for a sound card? Bleedin eck!!! That's not yer average PSU or sound card.

Anyway, if it's AC you just need a transformer. Not in sussex I suppose? I've got loads of huge old ones.

[DiscoStu]

No, as long as the voltage is the same.

No, except that a cheap power supply may give a higher voltage than the nominal value, when it is not fully loaded.

Thank you kindly

[singhr]

16VAC 1000mA for a sound card? Bleedin eck!!! That's not yer average PSU or sound card.

Anyway, if it's AC you just need a transformer. Not in sussex I suppose? I've got loads of huge old ones.

Thanks for offer. You saved me £30 there mate - thank you kindly. Nestling at the bottom of my box of cables and old pc junk was indeed a transformer of the right spec. Know idea what it came from but it's powering the sound card and not even a whiff of smoke. If you are interested in such matters its a Presonus Firebox which lets you hook up midi, mics, guitars etc. Sadly not my Plan B but my son's Plan A.