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Old 23rd August 2011, 03:00 PM   #301
Salas is offline Salas  Greece
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Too heavy a dummy load. Should be drawing half your CCS to 3/4 is correct. Use a 15R 2W-5W dummy to emulate ~220mA draw, set for 350ma to 450mA CCS. Check voltage drop across R301 to estimate what current you have available to use.
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Old 23rd August 2011, 04:20 PM   #302
merlin el mago is offline merlin el mago
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15R 5W dummy load
Vout +1.52V still can't adjust Vout with the trimmer
Voltage across R301 12R (+1.22V)
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Old 23rd August 2011, 04:24 PM   #303
Salas is offline Salas  Greece
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This way you got 100mA only. Go down 2.7R R301, keep the dummy @ 15R.
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Old 23rd August 2011, 04:50 PM   #304
merlin el mago is offline merlin el mago
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R301 2R7 (voltage across 0.81V = 300mA)
Vout 3.3V

Now YES: trimmer adjust Vout & all LEDs lit strong

Time to compare vs Trident TP stuff
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Old 23rd August 2011, 05:05 PM   #305
Salas is offline Salas  Greece
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Is the real circuit's constant consumption about 200mA?
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Old 23rd August 2011, 05:08 PM   #306
merlin el mago is offline merlin el mago
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Trident max Iout 100mA
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Old 23rd August 2011, 05:13 PM   #307
Salas is offline Salas  Greece
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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.
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Old 23rd August 2011, 05:23 PM   #308
merlin el mago is offline merlin el mago
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I lowered R301 till 2R2 so now I have 330mA, I will do the comparison vs the Trident clock regulator
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Old 23rd August 2011, 05:27 PM   #309
Salas is offline Salas  Greece
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I am not Russ to surely tell you what consumes how much in those modules, but I trust you will make it out in practice. Its shown that your reg works when the currents are at correct proportions, that's enough to start. Good luck.
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Old 23rd August 2011, 06:42 PM   #310
merlin el mago is offline merlin el mago
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Soul COME BACK

Better & more bass, more transients, more fast, better mids, glorious highs.

No Tridents, No Lifepo batteries, winner Salas BiB regulator

N.B. When your regs are more near the signal is born sounds better
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