In article , Nomen Nescio
writes:

September 2003, page 38 : how to replace
a pilot lamp by a LED and a resistor.
The high technical level of this article
is for CW coders only.

Page 31 is not bad too, the figure 4-A
shows a very sophisticated interface
including 2 resistors, 2 banana plug
sockets and 2 BNC plugs. This article
is reserved for EXTRA operators only.

I am relieved and enlightened that QST is showing such a leap of
technical understanding of the state of the art of electronics!

LHA