[hpsdr] Intelligent or dumb Alex, food for thought...

[Pieter Ibelings]

You must be taking about a reluctance tuned variable flux capacitor filter. 
Those are typically tuned to 1.21 GHz and require way to much power (1.21 
GW).

:)

>From: "Henry Vredegoor" <henry.vredegoor at gmail.com>
>To: <hpsdr at hpsdr.org>
>Subject: [hpsdr] Intelligent or dumb Alex, food for thought...
>Date: Wed, 7 Mar 2007 03:36:30 +0100
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>Hi All,
>
>I see a lot of discussion about Alex around a number of points:
>
>- On-board intelligence (CLPD) and flexibility versus "dumb" control
>- Which band pass filter frequency ranges to implement
>- Space requirements
>
>Also there was a request to have the band pass filter center frequency
>automatically adjust to the RX frequency in use.
>
>Yes, you saw this one comin'........... ;-)
>
>If we were going to have on-board intelligence anyway, would it be a more
>strait forward solution in this case to have this CLPD control one (or two,
>for dual RX)  say ~0 to ~30 MHz "CLPD-tunable" band pass filter's, instead
>of controlling (switching) a number of fixed band pass filters?
>
>Would this be doable and practical?
>
>- Less required space?
>- Only one (or two) RF-shielded compartments
>- All band
>- Performance w.r.t. noise (From control lines)?
>- Flexibility, selection of passband slope/center frequency position w.r.t.
>RX frequency
>- No (non-) overlap issues
>
>Just some food for thought....
>
>Henry.
>


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