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Superscan PI

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    • https://www.geotech1.com/forums/show...nd-short-delay

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      • Click image for larger version

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        The gpx5000 seems to have no reference value. I think I'm getting off topic.

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        • The gold scan is probably closer to it.

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          • Ultra scan lm337 I think it is used to stabilize the voltage, I can not see it can control the sound. The original may be a triode.

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            • Click image for larger version

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              • The LM337 is used as a current limiter for the audio.

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                • Click image for larger version

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                  • Click image for larger version

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                    • Originally posted by Alexismex View Post
                      [ATTACH]56718[/ATTACH]
                      Hello, do you know what the 150k on the 555 foot 7 does?
                      I found that it doesn't have any connection on the PCB nor on the circuit diagram

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                      • Most likely, it is used to choose to switch the potentiometer R2 from R3 to R1 in order to double the frequency of generator 555.

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                        • Click image for larger version

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                          • can anybody share pics of high resolution (5-12 MB size) of the Eric's pcb? long way to result i see here... so if you did up the matter....

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                            • There is a big difference in the position of the super scan sketch and the PCB, it is the place of the ammeter, it is hard to say who is right

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                              • Click image for larger version

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ID:	362482There is also an unconnected position, which I guess does the same thing as the above.

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