Okay thank you. I don't know well what values you want; I took what was
advised in the motorola application note
loop damping factor = 0,707
VCO gain = 25 132 741 rad/V
VCO center frequency = 77 MHz
PLL supply voltage = 5V
etc.

The values of the components of the filter are given in a previous post.


"zindazenda" a écrit dans le message de news:
...
and your filter values Damien?
i use those pll chips myself in various tx's..6.25khz to 100khz steps and
have no problems so will dig out the values for 6.25khz for you tonight to
compare.(using LF351/(6) (i think) as filter.
also pll built on double sided pcb (1w exciter.)
no seperate screening apart from vco coil,vco regulated with 78L08,( which
also supplies the 145152) noise is not a problem.sounds like as you
suspect
really bad vco overshoot.