[Lowfer] Homebrewed SSB Filter question
Andy - KU4XR
ku4xr at yahoo.com
Wed Apr 29 16:29:07 EDT 2009
Hello All:
I want to experiment a little, and try building a SSB filter that
will pass the USB of my Osc. at 184.322 KHz. I have never attempted
such before, but want to try just to see what happens. Once I
finish putting together the DSB Modulator, I'll need to shave off,
or greatly reduce the LSB component.
*** QUESTION *** ; If I use crystals to build the filter, will my
Center Frequency ( Fc ) need to be 185.822 KHz ?? I have a handfull
of 184.322 KHz crystals, but that would pass my carrier freq. and
not the USB audio. Am I correct on this ?? Not sure, so asking.
*** SECONDLY *** ; Since this will be used with a signal of about
33mW; what are some thoughts on possibly using Op Amps to design
a Bandpass filter for the USB audio ?? If this approach will work,
the Op Amps will also serve as amplifier stages ( I Think ).
This is just something I want to experiment with so I can at least
say I tried. I'll appreciate any replies.
Thanks, and 73 ::
Andy - KU4XR - EM75xr - Friendsville, TN.
LOWfer Beacon " XR " @ 184.322 KHz ( QRSS-60 )
Coordinates: N: 35* 43' 54" - W: 84* 3' 16"
http://www.myspace.com/beaconxr
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