[sdiy] power supply (un)symmetry

[Paul Perry]

I don't thnk it would matter for the SoundLab..
but, are you measuring it under zero load? Some regulators
require at least a few milliamps load to operate properly.
Also check the unregulated inputs tothe regulators to see
whether you have enough headroom.

paul perry melbourne australia

----- Original Message ----- 
> i recently built a little powersupply for the soundlab i am building. it
> converts 9VAC to +9V/-9V DC and +12V/-12V CD (for the midi2cv converter).
> its made out of four diodes, 4 polarized caps and some 78xx/79xx. actually
> it is a mod of the doepfer A-100 miniNT bus.
> unfortunately it is not 100% symmetric. actually it provides +9,2V/-8,8V
> (+12V/-12V accordingly unsymmetric). i don't know whats wrong yet.
> i wonder if this would be critical?