You will have to know what the circuit draws without Tridents since you are about to check without them. I have read that a Buff 2 draws 410mA with Tridents on it. Anyway, keep in mind to have whatever it needs in the end +100mA in CCS reserve. If it takes 200mA for instance, you are OK with 300mA.
Normally 3.3V, but the AVCC throws about 3.5V to achieve better dynamic range. Not shure about the current, but i guess it would be a few mA. I was thinking that the most significant sonic influence would be on the analog supply. That' s why the stock Buffalo II had shunt regs is this position from the beginning.
The BII it's with Salas V1.2R + BiB for the clock, now it's time to change the other 3.3V Trident, wich voltage & current needs the AVCC?
It's linked to your clock frequency. It about 36mA under 3.3v @ 50mhz and should be about 55mA 3.3v @100Mhz
100~150mA shunt reg should be Ok
...quad of green LED's rather than triplet in CCS...
Whoa, that woke it up. E/R=I, 3.25V across R1, R1=5.6 ohms.... 580mA. Dummy load is 12.6 ohms, output set at 5.3V = 420mA to simulate Buffalo 2 w/ Trident regs. (DC Vin is 11.3V, 6V headroom)
One of my CCS LED's glows a bit yellow, anything I should be concerned about? My 5W Vishay's should be here in a couple of days so I'll try those out before any more "quad mods". But, an interesting experiment, and would certainly power my DAC at this point for a test.
Whoa, that woke it up. E/R=I, 3.25V across R1, R1=5.6 ohms.... 580mA. Dummy load is 12.6 ohms, output set at 5.3V = 420mA to simulate Buffalo 2 w/ Trident regs. (DC Vin is 11.3V, 6V headroom)
One of my CCS LED's glows a bit yellow, anything I should be concerned about? My 5W Vishay's should be here in a couple of days so I'll try those out before any more "quad mods". But, an interesting experiment, and would certainly power my DAC at this point for a test.
What can I do with you Buffalo guys all over, I talked to Crt for adding a 4rth one in the next run for your convenience. They can be red also, to keep the voltage diff a bit tamer. Near 2W burning constantly on your 5.6R, now... Will make a 5W spec very hot in practice. Keep it off PCB distant enough.
Better change it.
One of my CCS LED's glows a bit yellow, anything I should be concerned about?
Better change it.
Normally 3.3V, but the AVCC throws about 3.5V to achieve better dynamic range. Not shure about the current, but i guess it would be a few mA. I was thinking that the most significant sonic influence would be on the analog supply. That' s why the stock Buffalo II had shunt regs is this position from the beginning.
It's linked to your clock frequency. It about 36mA under 3.3v @ 50mhz and should be about 55mA 3.3v @100Mhz
100~150mA shunt reg should be Ok
Thank you guys
Well, new current set resistors are in. Good and bad news. Legato supply current is almost exactly where I want it. Positive side is +14.9V@334mA (Rset=5r). Negative side is -13.9V@296mA (Rset=3.3r). These rail voltages put my Legato in the "sweet spot" (VCC/2)-1V . It all looks quite sinister on my chassis, Darth Vader would probably use these regs in his projects. Tried a 2r for Buffalo supply (5.3V), ....runs 650mA, so I plan to back that off. Probably needs about a 2.5r I would guess.
Can't comment on the sound quality because I've done something to the right channel on my Legato, no fault of the supply itself. I won't go into it because this is the BiB thread. I'll try to get it sorted out next week. My solder rework equipment at my workplace far exceeds what I have at home.
Can't comment on the sound quality because I've done something to the right channel on my Legato, no fault of the supply itself. I won't go into it because this is the BiB thread. I'll try to get it sorted out next week. My solder rework equipment at my workplace far exceeds what I have at home.
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