SUBAUDIO FREQUENCYMETER

[Esteban Cabrera Grinok]

Please,

I need a schematic of subaudio frequencymeter (0,01 hz-10 hz). I saw this schematic -I think- on a John Markus' circuit book.

[Carl]

Here ya go...




...from Markus' 1968 "Sourcebook".

[Esteban Cabrera Grinok]

Re: Here ya go...

YES!!!!

THANKS CARL!!!

I'm thinking in the possibility to use this idea for the study concerning frequency's changes in presence of different kind of metal at high depth. Too, may be I will need a low frequency comparator.


THANKS.