[sdiy] SAD-1024 delay line

[Aurora PPGsynth]

Hi -- I have a pretty reliable source of SAD-1024 delay chips and was 
wondering if someone could point out a decent schematic to build an echo box 
from a couple of these -- I would design the circuit myself, but I lack the 
experience, unfortunately.  I'll take what I can get, but I would appreciate 
something that isn't too obscure (i.e. contains parts that I can still 
find).

Thanks in advance!
John
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