Reflektor-D builds

[Greg Stewart]

Salas,

I have a couple of 'generic digital' power supply bases with 9 rails on each. 4 of these rails are the DAC and digital processing (isolators, reclockers, etc) supplies. On this base, those supplies are based on 2 Hammond 220D16 transformers, with one secondary used per supply. The secondary feeds a diode bridge of DSEP30-06A diodes (overkill, but in my experience good sounding) and the output C of each supply is a Jensen 47000/25V 4-pole capacitor. I also include a John Swenson transformer-ringing suppression snubber on each secondary (more info on that here: Good linear PSU(s) for CAPS music player that won't break the bank - Page 12 - Music Servers - Audiophile Style ).

All of these come together at a 16-pin Hirose connector which allows me to plug and play various digital sources.

Each 'base' also has a supply with a 5V and a 3.3V rail for a source (RaspberryPi, SDCard player, or similar), a lightly-filtered quick-drop-out supply for an on-off mute relay, and an output stage supply with a +-21V output where needed.

For the Allo.com Katana, I use just 2 of the DAC/digital processing rails. Sonics are slightly better if I use one rail from each transformer.

Greg in Mississippi

P.S. These bases are built onto a large bamboo cutting board which also acts as the siting platform for the digital source in use. My other base like this uses some discontinued Amveco toriod transformers instead of the Hammonds. At some point I need to compare sonics between the 2 versions.

 

[Salas]

Greg,

Quite elaborate, I was sure it would be an interesting setup description. Thanks for the details.

 

[sbelyo]

Finished these two minis a while back. They're powering an Amanero/Chronos/Rhea stack and a BIII pro se (9028)

 

[Salas]

Nice arrangement and thick cables

 

[sbelyo]

Nice arrangement and thick cables

Thanks, I used 14 AWG stranded. Any bigger and it was going to be tough getting them in place

 

[merlin el mago]

Salas Reflektor-D can be set to 1.8VDC?

 

[Salas]

No, the output Mosfet's Vgs does not permit

 

[merlin el mago]

Thanks. Any suggestion for other regulator?

 

[Salas]

In shunts no. The new to come L-Adapter series one will be starting very low in voltage and will have many amps for heaters, computers, mini class D amps, etc.

 

[merlin el mago]

Are you announcing a new one series regulator "L-Adapter"?

 

[Salas]

I had been talking about it here and there. Its to can replace wall wart SMPS adapters for various jobs. Test pcb not ready as we speak, but hopefully near.

 

[merlin el mago]

That's interesting, what will be the voltage & current range?

 

[Salas]

1.8V to 19V. Its output transistor can peak 15A. Say 100W average output safe. Depends on where you target with trafo and sinking. Can work ok with 2.5V in-out difference.

 

[merlin el mago]

I need for my Sony Vaio 19.5V 4.7A

 

[Salas]

It has ten leds to select the base voltage level with a jumper, and a trimmer for 1V vernier. You put bit more value trimmer and it climbs there, no problem.

 

[merlin el mago]

 

[merlin el mago]

I have bought this one for the Vaio

Ultra Low Noise linear power supply LPS PSU KIT 5V 9V 12V 15V 18V 24V L163-73 | eBay

 

[Salas]

It's good for the Vaio. L-Adapter will be much more simpler without loop feedback, single sinked power transistor, and going far below 5V also.

 

[merlin el mago]

Could be a good comparison?

 

[Salas]

I made it for general use to avoid SMPS adapter noise. To be simple, steady, non reactive, low noise, easily adaptable, easily serviceable. For comparisons with various good linear series regulators I don't know. It should be as good as DCSTB at least.