Hi, I with a ferrite rod antenna please

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The discussion revolves around building a ferrite rod antenna for an AM radio project, with the user seeking assistance after initial failures. The user has a ferrite rod with a diameter of 9.2 mm and is using 0.5 mm magnetic wire, but struggled to make the antenna work properly. Participants in the thread suggest checking circuit connections, measuring voltages at various points, and verifying the use of appropriate components like the LM386 audio amplifier. The user eventually resolves the antenna issue but continues to face challenges with the amplifier, indicating that they hear noise but at low volume. The conversation emphasizes troubleshooting techniques and the importance of correct component usage in radio circuit design.
  • #31
berkeman said:
What PCB? I must have missed something...
Is not working...man, like he don't exsit LM386, i hear with my earphone like i told you yesterday, but, i put 10u between pin 1 and 8 nothing change, because the signal is the same with or without LM386, is in MILIVOLT
 
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  • #32
berkeman said:
What PCB? I must have missed something...
hello
but you know what i did i destroy all,
i make new radio TRF, can you please tell what is the problem, i can hear in 8ohm speaker, i hear in crystalearphone i find the stations, i hear, after i try to to make low 0 volume, you hear nothing, after i start volume up i hear , when start more volume you hear noise not normal,
here is the circuit
choccy_trf_schematic.jpg
 

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  • #33
How can you expect help when you just change to a different project? Folks here put some effort into this and with no notice you simply abandon it and start on something else and expect help with the problems it has. So, again, I will ask you if you have some DC voltage measurements and know what they are supposed to be? In this case, you have the advantage of being able to take measurements while it is working correctly if I understand you right. Compare those measurements against measurements you take when it is not working correctly. No one can simply know what is wrong just because.
 
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  • #34
michael1978 said:
but you know what i did i destroy all,
i make new radio TRF, can you please tell what is the problem,

Thread is closed for now. This is too strange.
 
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