You wrote: >I mean, thats one of way is APD!!! >Anybody have any experience, here? >I have APD from Eg&g C30902E I have experimented with a CA30817 from EG&G in 2000 with some good results. Some old schematics can be found at : http://pageperso.aol.fr/YvesF1AVY/UK6.html I am sorry by the bad French-English translation on this site. 73 Yves F1AVY