Re: Unknown Home Built TRF radio
Where you have a gain control which is also controlling regeneration, as it seems to do in this circuit, it’s pretty normal for all the action to happen at the top end. This is certainly the case when a variable capacitor is used as a reaction control. Back in the 1920s achieving a good audio level from a TRF with regeneration was regarded as something of an art!
How long is your aerial? The set might perform better with a longer and higher aerial that would give it a stronger signal requiring less regeneration.
Martin
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