[GPS_Standard] Frequency problem with LTC1485 chip

[Phil]

Anyone ever have a problem with the LTC1485 (line driver) ? (U1)
I just built the GPS Standard and I couldn't get a "lock". I started at 
the front end and I've got 10 MHZ going in and 10,000,230 (approx) 
coming out!
I actually pulled the chip out and jumpered pin 6 to 1 (effectively 
bypassing the buffer chip) and got a brief lock.
I'm new to the project.. any help would be appreciated!

73 Phil N6WKZ