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Originally Posted by Thomas W. Bethe  How about an external power supply to get all the power supply mess out of the 1U chassis? I have always liked external power supplies for audio equipment especially where the signal has to stay as pristine as possible. Just an idea... |
Hi Tom,
I get your point about the external PSU but actually... i don't think it makes such a big deal anyway.
The DC voltage has to come into the box anyway and the external DC cable crosses the signal cables externally, tends to break soon, the PSU has to be somewhere in the rack (i hate that personally) and then you have AC and DC in the area of your cables.
I use really good shielded toroidal transformers and as you can see on the picture, i have extra shielding in the PSU section (in the final version there will be just DC going straight to the board.
About the 32 steps attenuator, i never seen these actually, did you see 'm anywhere?
I'm using my prototype for some time now (24 steps) and so far it's more then enough, i made the fixed point at 12 o clock right now so i have enough steps up and down and it's easy to go back to the centre this way.
But maybe someone else has some other ideas about that?
I'm still working on it right now, i think by the end of the summer i will have some new prototypes working here.
I'm about to get the key to my new house and that is priority number one right now.
I'm also think about a router for fast passive swithcing between sources, what would you like to see in a router? any fresh ideas might come in handy thumbsup