mecograph wrote:

So...my question for those of you that have R-390As or know them well,
when I tune "through" a CW signal, should I hear a nice DC note all
the way through or should it warble and show some distortion.

Depends on your PTO. Who made your R-390A? Some model PTOs are better
than others, and some will wobble while being tuned.
--scott

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