ImPasse Preamp now online

[Michael Rothacher]

I really need to get off my duff and build one of these.

Do I need two circuit PCB's and one power supply PCB?

 

[SY]

If you use Jack's PCBs, a single board houses two channels.

 

[merlin el mago]

That's probably not a good transformer- with a full wave rectifier, the voltage will be too low, with a doubler, it will be too high. See if you can find one with a 300-320V or so secondary to get you 500-450V raw supply.

I have two 240VAC = 480VAC, it's ok? what's your advice do it with Salas HV2 reg or using the schematic for B+?

 

[Michael Rothacher]

Thanks! Just ordered 'em.

 

[SY]

I have two 240VAC = 480VAC, it's ok? what's your advice do it with Salas HV2 reg or using the schematic for B+?

My advice is to use a different transformer. 😀 480V AC will give you almost 700VDC, which is a lot of volts to drop. An Antek toroid will cost you something like 25 euros.

 

[merlin el mago]

Cost me more the shipping to Spain - Europe than the transformer😡

 

[Michael Rothacher]

Got my boards and transformers today. They look really nice.
Power transformer ordered from Allied.
I have something special in mind to drive with this puppy.

Nice interview in this month's AudioXpress, Stuart! Very cool, and I like the lab.

 

[SY]

My wife made me straighten up the bench before she took the picture. 😀