[sdiy] BBD's in series and accumulative S/N ratio degradation.

[Mattias Rickardsson]

On 23 December 2011 15:53, Tom Wiltshire <tom at electricdruid.net> wrote:
> You might get away with it for a pair of BBDs, but I wouldn't try it with three, and four long BBDs is a definite fail. I tried it. I'd have avoided sticking three extra filters in my schematic if I could have, believe me. In my view, less is usually more. If you check schematics for long analog delay lines (for example; Yamaha E1010), you'll see inter-stage filters.

Interesting. Well, if the clock signal would just be mixed into the
audio signal, then it would be no big deal - but if it appears
differently depending on the audio signal level etc (which I would
expect) then it could be really tough to get rid of.

I haven't seen the E1010 schematics (or similar units), but if anybody
wants to share it I'd gladly open my inbox wide. :-)

/mr