Sputnik Signal Generator v1

102

00:52:08

Replication of the oscillator from Fran Blanche's rebuild of the Sputnik Beeper.  Doesn't oscillate with the N3906 PNP transistors, here or on the board.
Comments and input most welcome.

Note:  If you press the OFF button long enough for the caps to discharge considerably, a couple of brief pulses are generated.

published 6 years ago

hurz

6 years ago

quite a lot wiring mistakes. 91k at first slow oscillator are definitive not connected to ground, they have to connected to -9V. While the emitter resistors are with 1k much to big. tune them down or short then and it does start to toggle in about 2.5Hz. Anyway, any further analysis doesn't make sense, check first the original schematics, you will find a lot more bugs.

hurz

6 years ago

http://everycircuit.com/circuit/4566940432203776

RockDoctor

6 years ago

Thanks for your comments, Hurz. The original post and schematic is here (https://youtu.be/b8KduFyLevk) and this build appears to copy it. The updated schematic is here: https://twitter.com/contourcorsets/status/915600290371469312/photo/3 I am not doubting your edits to create a functional circuit, but stuffed if I can reconcile the differences between the two! 😆 What do you make of it?

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