[amsat-bb] DIY Spectrum Analysers - Broadband RX 50-800 MHz?

[Jim Jerzycke]

Or put them on eBay.....

73, Jim

On 04/29/2016 09:47 PM, Robert Bruninga wrote:
> Is there any value to a pile of old set-top cable boxes (maybe 30 or more
> of them)?
>
>
>
> Inside they have the typical DC voltage varactor tuned Cable Tuner modules
> that people used to make cheap spectrum analyzers out of.  Lots of articles
> back a decade or more ago.
>
>
>
> A simple DC voltage could tune them from maybe 50 to maybe 800 or higher
> MHz.  Output was probably around 50 MHz (Ch 3?)
>
>
>
> Should I bring them to Dayton?  Or chuck-em.
>
> Bob, WB4aPR
> _______________________________________________
> Sent via AMSAT-BB at amsat.org. AMSAT-NA makes this open forum available
> to all interested persons worldwide without requiring membership. Opinions expressed
> are solely those of the author, and do not reflect the official views of AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
>