View Single Post
  #18  
Old 03-07-2014, 03:44 PM
bandersen's Avatar
bandersen bandersen is offline
RCA 741PCS
 
Join Date: Mar 2009
Location: Chicago, IL
Posts: 8,808
It's really not over engineered. Take a look at any RCA or Admiral from the same year and they're pretty much the same. What you experienced were sets with inter-carrier sound where both video and audio go through a common IF. The audio is picked off after the detector and a trap keeps it out of the final video stage.

This set uses a separate IF for video and audio like many sets of the late 40s - early 50s. Here the audio trap is right after the tuner and two are amplified independently.

The reason I had so much trouble with aligning the set was bad mica caps and damaged video IF transformers. I wish I could have replaced them, but spare parts are hard to come by these days.
__________________
Here are my Vintage Radio & TV YouTube Channel and Photo Gallery
Reply With Quote