Quote:
Originally Posted by Tubejunke
The sound is just very weak. It is clear, and seems to tune in pretty close to the video; it is just very low.
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I have exactly that symptom with my current project, a DuMont RA-113. I'm going to try realigning the audio IF & discriminator in hopes of increasing the volume.
To practice up, I just tried that on my RCA T-100, which also showed weak volume when I quit working on it a couple of years ago. Tweaking the audio xfmrs made a big difference in the T-100, so tomorrow I'll give that a try on the DuMont.
Before you go there, however, I'd certainly replace any molded paper caps that remain in the set. They're every bit as bad as paper. In fact, they
are paper, only in a different shell.
Phil Nelson