Re: 491 Spectrum Analyzer with Custom Modifications


Miguel Work
 

It seems like a FM AM demodulator with manual tuning switch and tuning pot. I have two 491, is an interesting artefact :) https://entangledwaves.wordpress.com/2014/07/09/tektronix-491-spectrum-analyzer-teardown-and-analysis/ -----Mensaje original----- De: TekScopes@groups.io [mailto:TekScopes@groups.io] En nombre de Jeff Dutky Enviado el: lunes, 14 de junio de 2021 20:33 Para: TekScopes@groups.io Asunto: [TekScopes] 491 Spectrum Analyzer with Custom Modifications I saw this 491 on the auction site yesterday with a custom modification. Pictures here https://groups.io/g/TekScopes/album?id=265112 The listing ended last night. I was not the purchaser (sadly, the price was very good). Here is a link to the original listing https://www.ebay.com/itm/184704993611?nma=true&si=RZU6h9umVBH9zpUNGWIszvRCZ2M%253D&orig_cvip=true&nordt=true&rt=nc&_trksid=p2047675.l2557 I'm just curious if anyone can shed some light on what the modification is and does (or if anyone on this group was the purchaser, because that would be cool) -- Jeff Dutky Scanned by McAfee and confirmed virus-free. Find out more here: https://bit.ly/2zCJMrO

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