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Old 20th Sep 2022, 7:30 pm   #1
Radio Scotland
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Default My HomeBrew Signal Tracer

Built this ages ago but just got round to boxing it up today, Based on a circuit i found on youtube, Uses a 741 op-amp as a high impedance buffer and the bread and butter LM-386 for the audio amp,

Has a massive amount of gain, Had to shoehorn it into a very small box so no internal speaker..


Cheers
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Old 20th Sep 2022, 8:48 pm   #2
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Default Re: My HomeBrew Signal Tracer

Quote:
Originally Posted by Radio Scotland View Post
Built this ages ago but just got round to boxing it up today, Based on a circuit i found on youtube, Uses a 741 op-amp as a high impedance buffer and the bread and butter LM-386 for the audio amp,

Has a massive amount of gain, Had to shoehorn it into a very small box so no internal speaker..


Cheers

Have you got the circuit?
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Old 20th Sep 2022, 8:52 pm   #3
Radio Scotland
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Default Re: My HomeBrew Signal Tracer

Quote:
Originally Posted by Boulevardier View Post
Quote:
Originally Posted by Radio Scotland View Post
Built this ages ago but just got round to boxing it up today, Based on a circuit i found on youtube, Uses a 741 op-amp as a high impedance buffer and the bread and butter LM-386 for the audio amp,

Has a massive amount of gain, Had to shoehorn it into a very small box so no internal speaker..


Cheers

Have you got the circuit?
PM Sent.

Not sure if youtube link's are allowed on here
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Old 20th Sep 2022, 9:10 pm   #4
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Default Re: My HomeBrew Signal Tracer

They are allowed, yes.
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Old 20th Sep 2022, 9:11 pm   #5
Radio Scotland
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Default Re: My HomeBrew Signal Tracer

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Originally Posted by paulsherwin View Post
They are allowed, yes.
Cheers

Link
https://www.youtube.com/watch?v=PbsnI0uM5BM&t=1189s
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Old 25th Sep 2022, 5:02 pm   #6
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Default Re: My HomeBrew Signal Tracer

Added an audio / RF Switch, When connected to my 40M EFHW it picks up talk sport as loud and as clear as a superhet radio, With a tuned front end added it would make one hell of a TRF Set..
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Old 25th Sep 2022, 10:09 pm   #7
murphyv310
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Default Re: My HomeBrew Signal Tracer

Crystal set with an audio amp, fun indeed.
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