Ratio Detector question

  • Thread starter gabrigam66
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  • #1

Summary:

Ratio Detector connection question
Hi,

I built the attached ratio detector circuit and it works but I can't understand the reason for the connection marked in green.

I need an explanation, please.

Thanks in advance.

GR
 

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  • #2
NascentOxygen
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What you have marked is not one path, it's two paths. The horizontal line along the top is the circuit's + supply. It is taken to one end of C25, and the detector modulates it to form the audio and AFC signal. The + supply is also taken to the primary of the multi-winding transformer to supply the collector current for Q26.
 
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  • #3
thank for your Replay-

G.
 
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