Does any one, by any chance have the 'option freq' range
for the Antrouter R1-LTC ?!

all i have in the cgminer.conf is:
option freq '600:300:0b83'

and ofcoz is different than the R1-BTC chips...
it has a B1485 inside for LTC/Scrypt.

would be nice to run this one a little bit faster aswell.  

edit:typo