David wrote:

So here=92s my question: Building the pre-amp was a fun and useful
project, but is my scope=92s performance without the pre-amp typical?

No. Something is wrong. With the gain control set halfway, S9 signals
go way over the top of the CRT with my Collins R-390. This is using
log scale, too.

If your problem is the same in both linear and log, that's one thing to
rule out.
--scott

--
"C'est un Nagra. C'est suisse, et tres, tres precis."