SSLV1.1 builds & fairytales

[RCruz]

Hi Backbones

Totally agree with you... a better TX can improve matters... Smoothing caps also

[samoloko]

what are your recommendations for local decoupling load caps - type and value used after BIB output cap of value 10 - 100 uF

[AndrewT]

it depends on the load.
If the load can demand sudden changes in current, then local decoupling is mandatory.
If the load current changes slowly, then local decoupling becomes less than mandatory.

Local decoupling at the load has nothing to do with the PSU !

[samoloko]

AndrewT


what about If load Is dac chips and preamp
what I like to see Is what users of BIB place at local loads

[AndrewT]

the PSU should be designed to be stable when the current demand changes.
That's as far as the PSU can go. After that, improving, or changing, the PSU has no effect on how the LOAD changes it's DEMAND.

The load determines what local decoupling is needed to minimise distortions of the current consumer to it's own demands on the supply rails. If the DAC is well designed it will already have the necessary decoupling fixed in the correct locations to minimise distortion due to it's own operations.
If it's well designed but built down to a pricew there may be places where improvements to the DAC's decoupling can be made. These DAC changes/improvements have absolutely nothing to do with how the PSU remains stable into changing load currents. That is a completely separate (PSU) design issue

[samoloko]

well I don't want to redesign a PSU
the question Is relation between BIB out cap and local decoupling cap - influence between various types values

[Salas]

If you will ever get interference between your gear and the PSU's calculated termination because of near feeding point decoupling and this PSU's large bandwidth, you may try 0.1R in series at the feeding point and/or 100uF across sense wires at the PSU's output connector IF you will see anything weird when scoping the rail. Solid tantalum decouplers are nice.

[samoloko]

for an example let take Pass D1 - SM available
It uses electrolytic 220 uF local decaupling caps at psu dac pins
It also uses serial 3 pin regulators at psu
If I want to replace serial 3 pin regulators with BIB with 10 - 100 uF out cap what value Is recommended to use at dac psu pins - original electrolytic 220 uF or something else

[Salas]

Stay with originals.

[janos_904]

HI, I am going to build a BIB, and to compare to QuangHauo 1.0, in my DAC digital sections (TP Opus, WM8804 receiver). Does BIB better job? I have in my hand 2SK117BL, does it work in BIB or not? Thanks