29-10-2012, 10:12 AM
Hi Gary, yes that's more or less as I see it, it looks like the filtering is all done in the -ve rail as opposed to +ve rail with a combination of the 2 x 100uf and the 250r ? The PD across the 250r is as you say used as the bias potential.
If that reasoning is correct then the field coil would contribute little to the smoothing, I could be wrong on this?
I am thinking that the voltage drop across the field coil would be too much for a 110v set if the coil was connected in the conventional pi filter way. It looks a very efficient design.
Lawrence.
If that reasoning is correct then the field coil would contribute little to the smoothing, I could be wrong on this?
I am thinking that the voltage drop across the field coil would be too much for a 110v set if the coil was connected in the conventional pi filter way. It looks a very efficient design.
Lawrence.
