I called HQ this morning and spoke briefly with Gerald. He suggested
checking the drive audio out on Delta 44 output ports 3/4. I had a
chance to do this when I got home from work this evening. It displays
the exact characteristics that I hear in the monitor output when the
xmitter output goes away (or drops way off). I also had a chance to do
voltage measurements on these output ports 3/4 the results of which are
as follows
Keyed from any source (internal keyer, external key, "key down")
Tip (on 3.5mm plug going to SDR) starts at 508 mV and rapidly drops off
to 356 mV
Ring starts at 76 mV and at the same time as the tip, drops off to 36 mV
Using "Tune" holds max indefinitely - 508/76 mV.