I got some Palmer Isolation boxes for dirt cheap and was hoping to build a splitter with the transformers, plan was to have three transformer isolated outputs.
The transformers are good quality audio wise, but they don't have the extra shielding like the ones on the Lehle.
It did work, but there was some hum induced from the transformer that is in the power supply. In the second attempt, I almost got rid of the hum. I made a new board for the transformers and repositioned them (they had to be mounted vertically) tucked all away in the corner.
Also created a crude shield, positioned next to the Alembic transformer. But there was still some faint background hum when I turned the power supply on... (listening with headphones and input gain cranked up)
Then I started thinking of the units above and below the DS-5R... Samson Powerbrite, with a huge transformer right above the input section of the DS-5R. Ibanez HD1500 with it's own power supply under it... (did not bother to look where the transformer was located, but could also be problematic)
So for now I decided to ditch the idea, keeping the external Lehle solution.
I made a new "mixer" board and tidied/closed things up for now.
Now I will concentrate on the pedalboard connection, see if I can find a good use for the Palmers.
I suspect I can use the transformers (I have 8 to play with) to create Isolated and balanced connections for the 10 meter cable, more things to do and learn. :-)
Btw, the Isolation boxes are marked as Senso Audio , but are almost Identical to these:
https://www.palmer-germany.com/en/products/line-isolators/5185/li-05 They use the same transformers and are obviously made by Palmer. (Palmer tm is on the board)
These boxes[size=78%] [/size]
can easily be modified with 1/4 inch Jacks, already did one. :-) Some pictures of the first failed isolator attempt and one of the current situation
