Stereo FM decoders on tube radios were usually plug-in modules that could be purchased as an option. I have never worked on one of these before, so having a SABA E16 module in my hands was an opportunity that I simply could not pass up. I wanted to do a full restoration on it, as it does include a few electrolytic capacitors and poor quality resistors, but I also wanted to go further into its workings to learn more about the device.
In this video I probe the various signals with a scope to see what they actually look like. I also do an alignment, which serves to improve performance, and also to further de-mystify what is actually happening in the module.
Here is the link to the full service manual:
nvhrbiblio.nl/...
Enjoy the video.
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