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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*LF\:\s+Narrow\s+bandwidth\s+audio\s+filter\s*$/: 1 ]

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1. LF: Narrow bandwidth audio filter (score: 1)
Author: "Dick Rollema" <[email protected]>
Date: Fri, 26 Mar 99 14:57:58 PST
Dr. OM, Both Harry, PA0LQ, and I, PA0SE, for reception of the 137 kHz band use a passive audio filter with a bandwidth of 35Hz, centered on 1000Hz. Harry designed it as a linear phase filter with fou
/rsgb_lf_group-archives/html/rsgb_lf_group/1999-03/msg00184.html (9,046 bytes)

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