[time-nuts] LPRO 101 - does anyone know how much the C Field pot changes and what direction?

Hi Everyone, I'm going to try to calibrate my LPRO 101 to a GPS 1pps signal. Does anyone know what one turn clockwise of the c field adjustment pot will do to the signal in terms of ppb ? Thanks, Alan ___ time-nuts mailing list --

Re: [time-nuts] LPRO 101 - does anyone know how much the C Field pot changes and what direction?

Hi Alan, Just did this. Less than 0.005 Hz. To really fine tune it, you need to used the C-field adjustment pin. This circuit is simple. A Linear Technology LT1236 precision 5V regulator and a 10 K linear 20+ turn pot. You can get a sample of the chip free from Linear Technology.

Re: [time-nuts] LPRO 101 - does anyone know how much the C Field pot changes and what direction?

Hi Brian, Just did this. Less than 0.005 Hz. Thank you - was clockwise 0.005 higher or lower? My Rb is about 0.000731284 fast according to my estimate. To really fine tune it, you need to used the C-field adjustment pin. This circuit is simple. A Linear Technology LT1236 precision 5V