Hi Guys; I am new to this list so please forgive me if my questions are dumb or redundant. I just rebuilt a much abused Heathkit DX-100B. As far as I can tell it is operating OK into a dummy load. I have not put it on the air yet. For one thing, I don't have a 75 meter antenna up yet. I have a mobile ant I will install as soon as I have time. I do have a MFJ G5RV jr that is good for 40 meters and higher. I have not heard any AM on anything but 75 meters. Is there activity on 40 and / or 20 meters?
I modified a scope to serve as a modulation monitor. I noticed 2 things that puzzle me. 1. It is hard to tell modulation percent with voice as the waveform keeps changing and unless I use a sine wave I can't sync it to get a good envelope pattern. Any trick to this? 2. Using the mod mon I see that it is very easy to over-modulate. If I keep the modulation down so I don't see short bright lines in the center of the screen (carrier disappearing, I think) , the average modulation is around 50% except for occasional peaks. Is this normal? would a compression amplifier help? Thank you. 73, Ed Richards K6UUZ
