bButcher
Head-Fier
- Joined
- May 29, 2016
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Talking about downgrade, now this is a upgrade for F-1 owner. It will boost F-1's performance to at least the same level as SU-1 if not better at expense of couple of dollars.
(1) Remove Mornsun B0505S (pink circle) which at worst will generate 100mV noise at isolation section
(2) Replace generic 3.3V LDO (orange circle) which provide power to Xilinx cpld with ADP150AUJZ-3.3-R7 (~1.0$) - the same ultra low noise LDO (white circle) used to drive the two CCHD XO.
(3) Also replace the same generic 3.3V LDO (red circle) used for XMOS with ADP150AUJZ-3.3-R7 (~1.0$); with this mod you should not need any external 5V for the USB.
(4) Use 18605 Li-ion battery to drive the isolation section directly (green circle): Since both LDO on the isolation section are ADP150, they will work fine as long as the input voltage is between 3.4V ~ 5.5V, thus Li-ion battery is perfect for this job. The measured power consumption is 44.1mA on my F-1, so a single 2700mAh 18650 battery will give you around 40~50 hours listening.
(1) Remove Mornsun B0505S (pink circle) which at worst will generate 100mV noise at isolation section
(2) Replace generic 3.3V LDO (orange circle) which provide power to Xilinx cpld with ADP150AUJZ-3.3-R7 (~1.0$) - the same ultra low noise LDO (white circle) used to drive the two CCHD XO.
(3) Also replace the same generic 3.3V LDO (red circle) used for XMOS with ADP150AUJZ-3.3-R7 (~1.0$); with this mod you should not need any external 5V for the USB.
(4) Use 18605 Li-ion battery to drive the isolation section directly (green circle): Since both LDO on the isolation section are ADP150, they will work fine as long as the input voltage is between 3.4V ~ 5.5V, thus Li-ion battery is perfect for this job. The measured power consumption is 44.1mA on my F-1, so a single 2700mAh 18650 battery will give you around 40~50 hours listening.