Hi, I with a ferrite rod antenna please

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    Antenna Hi Rod
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Discussion Overview

The discussion revolves around constructing a ferrite rod antenna for an AM radio receiver, specifically a TRF regenerative type. Participants share their experiences, challenges, and seek assistance in troubleshooting their setups, including issues related to the antenna and associated circuitry.

Discussion Character

  • Exploratory
  • Technical explanation
  • Homework-related
  • Debate/contested

Main Points Raised

  • One participant seeks help in building a ferrite rod antenna and expresses confusion about the construction process.
  • Another participant questions the specified diameter of the ferrite rod, suggesting it may be a misunderstanding of the dimensions.
  • Several participants inquire about the steps taken in the construction process and the availability of test equipment, such as a Digital Voltmeter or Oscilloscope.
  • There are discussions about the potential benefits of consulting local HAM radio operators for guidance.
  • One participant shares a link to a circuit schematic and describes their attempts to build the circuit on a breadboard, noting difficulties with noise and destruction of components.
  • Another participant expresses interest in the project and encourages sharing circuit diagrams and measurements to verify the setup.
  • One participant mentions successfully constructing the antenna after receiving advice but encounters issues with an amplifier (LM386) not working properly.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the correct dimensions of the ferrite rod, and there are varying opinions on the construction process and troubleshooting methods. The discussion remains unresolved regarding the effectiveness of the amplifier and the overall functionality of the circuit.

Contextual Notes

There are limitations in the clarity of the dimensions provided for the ferrite rod, and some participants express uncertainty about the circuit's construction and testing methods. The discussion includes references to external resources and personal experiences that may not be universally applicable.

Who May Find This Useful

Individuals interested in DIY electronics, particularly those working on AM radio projects or learning about antenna construction and troubleshooting electronic circuits.

  • #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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Likes   Reactions: dlgoff, davenn and Averagesupernova

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