AmyAlice: DC filter for SMPS, using 2 feedthru capacitors + SMD assembly. max 3A & max 48V

[Mark Johnson]

If you have room you could try connecting the two filters in series to see if the noise floor drops even further. You could even test both possible sequential connections

• DC In ---> PO89ZB ---> AmyAlice ---> (ACP+ and ACAMini)
• DC In ---> AmyAlice ---> PO89ZB ---> (ACP+ and ACAMini)

just to be a thorough experimenter.



_

 

[ggetzoff]

Mark,

Brilliant work. I use the PO89ZB board with a LOT of projects around the house. I will have to order some boards and build some of these as I have done plenty of SMD work.

Any plans for higher current at that rail voltage? (sorry if I missed you already answering this).

Cheers,

Greg

 

[Hammett]

I recently put together a second ACP+ using the AmyAlice.

The two units are virtually identical, but one is using two PO89ZB boards in series and the other is using the AmyAlice.

The AmyAlice unit sounds better. Without going into audiophile terminology, the sound is more relaxed and seems to be coming from a blacker background.

The P089ZB is still worth building if you are not up for minimal SMD soldering. The only hard part for me was that third leg on the C1/C3 caps, but only because my eyes are not what they once were.

 

[ggetzoff]

Hammett,

Have you built the Mini? It's excellent with a single PO89ZB. It's become one of my favorite amps, and I think it's about 98% of Nelson's other low power designs.

Cheers.

Greg

 

[Hammett]

I am about 95% done with an M2x. I need to wrap that one up!

 

[Mark Johnson]

No concrete plans for beefier offshoots. But it is difficult to make predictions, especially about the future. (N. Bohr)

 

[BRN]

The AmyAlice unit sounds better. Without going into audiophile terminology, the sound is more relaxed and seems to be coming from a blacker background.

I had the same experience using the AmyAlice.