Hi all,
After wanting a Helicorder of my very own for a long time, I've gotten ahold
of 
a Geotech Portacorder RV-320, which after some repairs is working.  Geotech 
(geoinstr.com) very nicely sent a manual for an RV-320B for free, but the B 
seems to be the next model, about 10 years newer than mine.  Does anyone 
have a manual for the older RV-320 (circa 1977)?
 
Also, I seem to have the smoked-paper version, does anyone know how horrible
that 
is to work with, and where might I get some appropriate paper (for
relatively low $)?
 
Thanks,
Jack
 







Hi 
all,
After wanting a 
Helicorder of my very own for a long time, I've gotten ahold of 
a Geotech 
Portacorder RV-320, which after some repairs is working.  Geotech 

(geoinstr.com) very 
nicely sent a manual for an RV-320B for free, but the B 
seems to be the next 
model, about 10 years newer than mine.  Does anyone 
have a manual for 
the older RV-320 (circa 1977)?
 
Also, I seem to have 
the smoked-paper version, does anyone know how horrible that 

is to work 
with, and 
where might I get some appropriate paper (for relatively low 
$)?
 
Thanks,
Jack