Reflektor for subbu dac 2.6
Here is my Reflektor-D for a subbu dac v2.6 . Used big heatsinks and R1=1ohm. It is getting quite hot with that setting so im gonna swap it with with some higher value resistor. It sounds fantastic. 🙂 Kudos to Salas for the reflektor design and to Jean-Paul and Subbu for their dac
Here is my Reflektor-D for a subbu dac v2.6 . Used big heatsinks and R1=1ohm. It is getting quite hot with that setting so im gonna swap it with with some higher value resistor. It sounds fantastic. 🙂 Kudos to Salas for the reflektor design and to Jean-Paul and Subbu for their dac
Attachments
Nice pics. Vintage Black Gate from deep in the cellar I see 😀
The Subbu does not burn too much itself so most of your 600mA goes to the output sink. I have one too. Its a very nice sounding simple DAC for coax Toslink. Try 1.5R to 2R range CCS setting resistor too. But in good quality again as is your original.
The Subbu does not burn too much itself so most of your 600mA goes to the output sink. I have one too. Its a very nice sounding simple DAC for coax Toslink. Try 1.5R to 2R range CCS setting resistor too. But in good quality again as is your original.
😀😀 Yeap. The older they get, the better they get. 😀
I have a Mills MRA-5 1R8 which should fit nicely there. The cable from reflektor to subbu dac is aprox. 3 cm and im using sense wires. Should i continue to use them or should go for a plain 5v 0 configuration?
It will also be a better CCS setting for ripple with your (3300uF?) reservoir capacitor (see post #815). Only 3cm thick enough wires in two wire conventional arrangement should practically do the same job as Kelvin.
I build Reflektor-D using BC560 for Q1-4 and just Red Led. My target V-out 3.3V , but i got 3.8V , my residual voltage 1.7V.
Do i have to use 2N4403 ?
Do i have to use 2N4403 ?
Is it really 0.85V Vbe (residual/2)? Measure b-e of your BC560s in circuit. If yes it seems much. When you don't run excessive current through them but 2-5mA that is. Is it not your output Mosfet low Vgs TTL type as specified maybe ?
P.S. If you used a normal Ref-d board the pin order is the other way around for using 560s i.e you must rotate them. They are bit noisier than the originals but they should basically work.
I measure it in circuit, i got 1.68V (0.84V). i use mtp3055 for output mosfet. My own layout
R6 994 (measured), 3,04V accros it.
I get 0.89V Vbe and 0.78V Vbe.
My Mosfet Out MTP3055E. Can i use IRL3803 ?
What happens I think is the high Vgs you got (its across R6) compares nearly to your Vout and the right side of the mirror runs much current. You may try confirm that with measuring mA between the led and ground by lifting its cathode pin and connecting it through the meter in series to gnd.
It may work with that IRL type because logic level 1V min Vgs (th) but don't keep it because it has huge parasitic capacitances also i.e. it will compromise the spec a lot. Use it until you get the VL.
It may work with that IRL type because logic level 1V min Vgs (th) but don't keep it because it has huge parasitic capacitances also i.e. it will compromise the spec a lot. Use it until you get the VL.
That what i thought too after read MTP3055E and MTP3055VL. They have diff Vgth 2-4 vs 1-2V. I think IRLZ24 another good replacement ?
didiet78, I am successfully using IRL530 as a shunt element:
http://www.irf.com/product-info/datasheets/data/irl530.pdf
It has low enough Rds,on (rated 0.16Ω at 5V Vgs) and gate treshold voltage is in the 1.0V-2.0V range. Additionally it is available locally and is comparatively cheap.
http://www.irf.com/product-info/datasheets/data/irl530.pdf
It has low enough Rds,on (rated 0.16Ω at 5V Vgs) and gate treshold voltage is in the 1.0V-2.0V range. Additionally it is available locally and is comparatively cheap.
The only available logic level mosfet locally just irl3803. Irlz24 out of stock. 🙁
Maybe i will use BiB with Bjt for now until i find out mosfet
My aplogies for the Noob question. Can someone please assist me with specifying a Antek transformer for the Salas Reflektor-D ?
Antek Website
Thank you !
Antek Website
Thank you !
AN-0209 with output 1 and output 2 secondaries connected in parallel to load (to Ref-D AC input)
Reflektor-D Transformer
Dear Salas,
Thank you !
By the way, so impressed by your work. I am just learning, good to learn from the best.
Dear Salas,
Thank you !
By the way, so impressed by your work. I am just learning, good to learn from the best.