2. digital
  3. 127383-506

Filter tweak for digital backwash?

As my system improves, it’s easier to hear anomalies. The search is now on for a tweak to filter only digital backwash in my AC. The culprit is the regulated transformer power supply (120vac/19vdc converter) to the dedicated laptop for streaming.

The balanced power conditioner has separate outlets for analog and digital. The digital outlets already have built-in filtration for backwash. They work well. But, I need even more. When the laptop is running on its internal battery, the music is very smooth. Unfortunately, the battery life is short. When the laptop is running on the power supply, there’s a slight stridency. When the power supply is plugged in anywhere else, there is huge stridency. So, I’m looking for some gizmo to clean up the digital backwash in-between the conditioner digital outlet and the power cord to the regulated power supply.

I’m not looking for an overall line purifier. The balanced power conditioner does a pretty good job already. Any suggestions?


steakster
steakster OP
720 posts
 
Update: Added a 2nd ICT PCM-12ADL to my system. This time to the 12vdc linear power supply for the digital re-clocker. Wow! Clean, clear, beautiful music! If you have an Astron or similar linear power supply, I highly recommend this unit. A very inexpensive, yet very effective tweak a la Ebay.
erik_squires
5,268 posts
 
Astron makes nice things, but I like meters, so they get more expensive! :)
ptss
1,649 posts
 
Re the noise cause being a ground loop. Would it be a benefit to create a small extension cord for that digital outlet and drop the ground?
steakster OP
720 posts
 
There are several ways to lift the ground - including a cheater plug. In my case, there was never a ground loop problem. To deal with the digital backwash, I mentioned previously that my linear power supply was plugged into a digitally filtered AC outlet of my balanced power conditioner. The ICT PCM-12ADL is so effective on the DC leg by itself, that I re-plugged the power supply into a non-filtered AC outlet. Much better dynamics.
More to discover