Hi all.
I'm thinking about changing the coupling caps in a GSG to highpass the output for a couple of frugalhorn receivers at about 80Hz, maybe a little higher. From w=1/(2pi*R*C), I get C=0.004uF to set the corner at 80Hz.
I have two questions. 1) does 0.004uF look right? 2) if I have some 0.047uF caps already, can I swap out the two following resistors (currently 475k) for 42K ones and go with the 0.047uF capacitors?
Thanks!