Re: [time-nuts] New Time nut FRK-H repair questions --- IT Works!!

At 3:02 PM +1100 11/23/07, swingbyte wrote: Thanks for the help - the manual is great. I have trimmed the xtal so the control voltage is around 8.5V. The lock output is working - drops from 1.5V to 0.03 volts when locked. I only have an old HP5340A with OCXO option as my frequency meter. It

[time-nuts] New Time nut FRK-H repair questions

Hi, I've been reading this group for some time now and have recently purchased an Efratom FRK-H unit. Now I need to make it work! I have powered it up and after warmup it draws [EMAIL PROTECTED] I have a 10MHz output sinewave and a lamp voltage of 8.14V. The xtal ctrl voltage is 12.2V and

Re: [time-nuts] New Time nut FRK-H repair questions

Corby gave you good information. Probably you need to monitor the resistance to ground on the lock signal for low (mine was about 140 ohms) when locked. In the manual referenced below, it looks like the lock output is pulled up to +17V so you *would* see a voltage change if yours had that

Re: [time-nuts] New Time nut FRK-H repair questions --- IT Works!!

Thanks for the help - the manual is great. I have trimmed the xtal so the control voltage is around 8.5V. The lock output is working - drops from 1.5V to 0.03 volts when locked. I only have an old HP5340A with OCXO option as my frequency meter. It reads 10.00MHz as the output from the

Re: [time-nuts] New Time nut FRK-H repair questions --- IT Works!!

I only have an old HP5340A with OCXO option as my frequency meter. How good do you think the calibration on the OCXO is? I have a GPS receiver I have to get going that has a 1PPS output on it. What would be an appropriate way to use this to calibrate the FRK - in my lifetime:) The PPS