Hi,
 This is my first post here - I've been lurking around for a couple of
 weeks, bascially since i got my 4-row a100 setup. I followed an
 earlier advice of Dieter and got one of those cheap voltcraft scopes,
 which has helped me a lot for understanding already most of the more
 subtle features and quirks of the system.
 I was wondering if anyone of you has been succesfull to get the a108
 to work as an 'ordinary' 24 db filter with '24db' resonance. When I
 hook up the 24db output to the feedback input, I can't get even close
 to self-oscillation. Inserting a polarizing amp (138c, so as to be
 able to change the phase) doesn't really do the job, but can get the
 108 into some evil low freq oscillations when polarity is reversed.
 Great fun all, but why can't I get resonance in 24db mode I find the
 48db resonance ok, but was curious to be able to get other, somewhat
 milder resonance behaviors.
 Cheers, Martin