I am doing some cogitating on the Ampico system and am a bit puzzled
by my calculations.  It doesn't seem logical that a 7-level system
gives only 6 different levels.  Has any one ever measured the stack
vacuum levels at each intensity setting?

My work suggests the 6th intensity is at pump pressure regulated,
and the loudest intensity 7 is at pump pressure unregulated for both
'Normal' and 'Brilliant'.

Can anyone shed any light on my dilemma?  Sorry, but I haven't waded
through the MMD Archives.

Regards,
Paul Rumpf

 [ The drawing of Ampico B intensity scales is reproduced at
 [ http://www.mmdigest.com/Gallery/Tech/Ampico/amp21.htm 
 [ -- Robbie