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Old 9th Mar 2021, 1:16 pm   #18
Wendymott
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Join Date: Jun 2013
Location: Huddersfield, West Yorkshire, UK.
Posts: 1,795
Default Re: Noise in receivers

Let me throw a virtual "hand grenade" into the mix...... There is a lot of theory being spoken about the diode and its actions....... I now know where my noise is coming from. The early variants of my FRG 7's as in the Somercamp versions. Its an AGC problem. The RF section is being shut down too early, as in < 10uV..... any increase in RF level above that the noise increases but the audio level of the tone does not...either its a design error that was rectified later, I know not... yet. I will let you guys get back to the Theory
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Wendy G8BZY
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