GB for Salas Reflektor-D Power Supply for Digital - diyAudio
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Old 28th June 2014, 12:56 AM   #1
Tea-Bag is offline Tea-Bag  United States
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Default GB for Salas Reflektor-D Power Supply for Digital

This is a GB for Salas Reflektor-D Power supply.
This is a Low Voltage supply designed specifically for digital.
3.3V to 7V at 600mA max output using board level sinks.
Schematic and build info in PDF attachment at the bottom of post.

Click the image to open in full size.

In the words of Salas -

The Reflektor concept is a shunt voltage regulator made around a current mirror circuit. To keep equal current between its input and output legs, the mirror reacts to flow disturbances and drives a MOSFET in opposite direction. A current loop simple regulator is another way to describe it. Specifically Reflektor-D is a version focusing on the voltage region common for powering digital source projects. For convenient mounting and setting it utilizes board level sinks and simple ways to choose its current limit and voltage output levels


The board is offered in a Matte Black 2MM thick PCB with 2 OZ copper. The cost is $16.00 plus shipping.

Click the image to open in full size.


It was a very easy build, it took me 45 minutes to complete and then start testing, and got near target voltages rather easily via the LED swaps.
Three different kits will be offered. A transistor kit, a resistor kit, and a full kit, which includes all parts for board except standoff parts and MOSFET bolts and nuts for the heatsink.

Click the image to open in full size.

The signup for the boards is in my signature. This GB will close on July 20th.

Kit parts list
Part Position Quantity
Transistor
IRF9610PBF M1 1
MTP3055VL M2 1
2N4403TA 6
1N4148 alt Rxjd 1
2SK117GR Measured (3-5.5ma) J1 1
LED Red (1.8) 2
LED Yellow (1.93) 1
LED Green (2v) 3

Resistor Kit
MRS25-120R R2,3,4 3
KOA Speer MF1/4 61.9R Rj/x 1
KOA Speer MF1/4 82R Rr 1 (o(
OR 47R MRS25 for Rr for 3-4ma IDSS J1)
MRS25-1R R5 1
CMF551K0000BEEB 1K .1% 25PPM R6
CPF2-1.0R R1 alt 1
CPF3-1.5R R1 alt 1
CPF2-2.0R R1 alt 1
5W 20R Load Dummy Test 1


FULL KIT EXTRAS, Includes Transistor and Minikits
Caps
Wima MKP10 .1uf 630v C1 1
Nichicon 10,000uf 25v KG CM 1
Nichicon 1000uf 25v KZ C2 1

Connectors
2P Molex 5mm pitch 1
4P Molex 5mm pitch 1
Wakefield 647-20ABPE M1,M2 2
Keystone washer M1,M2 2
Diodes TO-220 4
Attached Files
File Type: pdf Relektor-D_Guide.pdf (471.0 KB, 313 views)
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Salas Boards 2014 #2 On order |F5TC board and power supplies available PM | Hot-Rod DCB1 boards and kits available PM |Mesmerize kits available (no boards)

Last edited by Tea-Bag; 8th July 2014 at 01:15 PM. Reason: see note regarding Rr resistor set values for J1.
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Old 28th June 2014, 04:34 AM   #2
nezbleu is offline nezbleu  Canada
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I don't even have a DAC and i want a pair of these! Other than the 2SK117s, are any of the parts hard to source? Since I'm not in a rush I might enjoy getting the parts myself.
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Old 28th June 2014, 05:16 AM   #3
Salas is offline Salas  Greece
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Quote:
Originally Posted by nezbleu View Post
I don't even have a DAC and i want a pair of these! Other than the 2SK117s, are any of the parts hard to source? Since I'm not in a rush I might enjoy getting the parts myself.
There is a modern Toshiba SMD equivalent mentιoned in the guide, also special pads for it (red flats in the pic), and info on what RR value if GR or BL for both TO-92 and SMD. Avoid eBay especially for semis. There are pads for fancy R1 and R6 too. Caddock MP930 and Vishay VAR. Those two parts can cost as much as all the semis and all the nice 50ppm-100pm resistors together though. But don't build with generic passives either. At least at the quality level listed and tested already.
Attached Images
File Type: png SMD detail.png (6.0 KB, 760 views)
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Old 28th June 2014, 09:19 AM   #4
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Hello Mike

I would like a precision. If i want all the parts ,i need:
The PCB
The Transistor Kit
The Resistor Kit
The FULL KIT EXTRAS
Thanks

Serge
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Old 28th June 2014, 02:12 PM   #5
Tea-Bag is offline Tea-Bag  United States
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Quote:
Originally Posted by Sergelisses View Post
Hello Mike

I would like a precision. If i want all the parts ,i need:
The PCB
The Transistor Kit
The Resistor Kit
The FULL KIT EXTRAS
Thanks

Serge
Ok, I put you on the spreadsheet. The Full kit includes the Transistors and resistors. I will try to clarify that better. Thanks!
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Salas Boards 2014 #2 On order |F5TC board and power supplies available PM | Hot-Rod DCB1 boards and kits available PM |Mesmerize kits available (no boards)
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Old 28th June 2014, 02:25 PM   #6
Turbon is offline Turbon  Sweden
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Added 2 reflector boards and 2 full kits on my row

Regards
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Old 28th June 2014, 02:30 PM   #7
Tea-Bag is offline Tea-Bag  United States
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Quote:
Originally Posted by Salas View Post
There is a modern Toshiba SMD equivalent mentιoned in the guide, also special pads for it (red flats in the pic), and info on what RR value if GR or BL for both TO-92 and SMD. Avoid eBay especially for semis.
Yes, order yourself some Toshiba 2SK880GRs. If you look closely, mine is running one on an adapter board, only because it was previously being tested that way also in a BIB, and I could desolder quickly for another couple I had at different IDSS values. They are difficult to work with, as they are very small, but with some tweezers, no jitters, and a little solder they go on fine. If I can do it, probably most can. I am uncoordinated and most certainly half-blind from mid-life old age
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Salas Boards 2014 #2 On order |F5TC board and power supplies available PM | Hot-Rod DCB1 boards and kits available PM |Mesmerize kits available (no boards)

Last edited by Tea-Bag; 28th June 2014 at 02:35 PM.
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Old 28th June 2014, 02:36 PM   #8
Turbon is offline Turbon  Sweden
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Salas wrote that maximum V is about 7V. Could it be forced to 8V without risk? What changes needs to be done in that case?

Regards
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Old 28th June 2014, 04:16 PM   #9
Salas is offline Salas  Greece
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Quote:
Originally Posted by Turbon View Post
Salas wrote that maximum V is about 7V. Could it be forced to 8V without risk? What changes needs to be done in that case?

Regards
It could, but takes a longish answer, better we discuss technical details in the simplistic regulators thread in power supplies section, or later on in a dedicated Reflektor-D builders thread when the builds will start.
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Old 28th June 2014, 05:25 PM   #10
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Signed for 2 PCBs + 2 resistors kits + 2 transistors kits
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