| One might think this device would help analog radios as well. Most lack the 
preselector feature and have half octave filters, which may be inadequate in 
some situations.
Gary
> On Sep 16, 2016, at 11:28 AM, Rich Jones via TenTec <tentec@contesting.com> 
> wrote:
> 
> QEX magazine May/June 2008 M0MWA presents a computer controlled turnable 
> bandpass filter (preselector)for use with software defined radios.1.8-30 mhz 
> article includes schematics.   Good luck, Rich K8UV
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