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Cheap Crystal filter:
Ladder filter using six 4.43MHz Crystals. Building cheap side
band filter for your bome brew SSB Rig. |
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Crystal filter for pure signals:
05/13/98 Electronic Design - Ideas for Design / Applications
such as distortion and communications measurements require
distortionless sine waves as input test signals. Distortion in
test signals causes two problems. First, the
test-signal-distortion content must be calibrated so it can be.
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