You'll find a little more modern technical info in HP AN-1054,
available at
http://rf.rfglobalnet.com/library/Ap...s/1/An1054.pdf.

T'aint fair Tom! That URL is FB and I have it added to my library, but when
I tried to trick it and deleted the AN-1054.PDF, and retyped AN-983.PDF, it
can't find that one. Suppose I could write a little program to check AN-1
and step 1 then find out what if anything I had. Is there some secret code
as to how this all works?

Regards

W4ZCB

(I suppoe it wouldn't be a secret anymore if you told me.)