491: Difference between revisions

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* [http://www.ko4bb.com/manuals/index.php?dir=Tektronix/Tektronix_-_491_Spectrum_Analyzer Tektronix 491 manual @ KO4BB]
* [http://www.ko4bb.com/manuals/index.php?dir=Tektronix/Tektronix_-_491_Spectrum_Analyzer Tektronix 491 manual @ KO4BB]
* [[Media:050-0692-03.pdf|Tektronix 491 Band C Oscillator Replacement Modification (PDF, OCR)]]
* [[Media:050-0692-03.pdf|Tektronix 491 Band C Oscillator Replacement Modification (PDF, OCR)]]
* [[Media:Tek 491 mod wa.pdf|Tektronix 491 Mod WA (PDF, needs OCR)]]


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