MrShhh
Well-known member
Hi, I'm trying to make sense of this schematic:
http://i985.photobucket.com/albums/ae333/MrShhh_2009/W75kschematic.jpg
Sorry about the quality, it's all I could get hold of :-\ You might have to zoom right in to read some of it.
1) Does anyone know what kind of passive bandpass this is? If I know the type, perhaps I can research how to correctly work out the inductor tapping values for Dr4 and Dr5.
Is it as simple as working out the crossing of the function for the capacitive reactance Xc = 1/(2 Pi * f * C) and the function for the inductive reactance XL = 2 Pi * f * L?
2) Any ideas what Dr1 is? 2 inductors back to back? Some kind of ferrite bead? A transformer? If it's an inductor, there seems to be no way of knowing how many mH it is.
Thanks
http://i985.photobucket.com/albums/ae333/MrShhh_2009/W75kschematic.jpg
Sorry about the quality, it's all I could get hold of :-\ You might have to zoom right in to read some of it.
1) Does anyone know what kind of passive bandpass this is? If I know the type, perhaps I can research how to correctly work out the inductor tapping values for Dr4 and Dr5.
Is it as simple as working out the crossing of the function for the capacitive reactance Xc = 1/(2 Pi * f * C) and the function for the inductive reactance XL = 2 Pi * f * L?
2) Any ideas what Dr1 is? 2 inductors back to back? Some kind of ferrite bead? A transformer? If it's an inductor, there seems to be no way of knowing how many mH it is.
Thanks