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My "new" Tek 485 with opt 4

Reginald Beardsley All Messages By This Member #149820 I just got a nicely refurbished 485 which lists "opt4" under the SN. I could find no information despite several searches. I was surprised at how little information there was at the w140.com/Tekwiki. My 465 manual says opt 4 is EMI environmental. Is that true of the 485 also? It came with a CD of the service manual, but I'd like to get a nice hard copy original if anyone has one they are willing to part with. I can offer a 465 and RM45 manuals in good condition in exchange.
Dave / NR1DX All Messages By This Member #149822 The 1982 catalog lists Option 04 for the 485 indeed as EMC option -DC manuals@... toggle quoted message Show quoted text On 7/19/2018 4:25 PM, Reginald Beardsley via Groups.Io wrote: I just got a nicely refurbished 485 which lists "opt4" under the SN. I could find no information despite several searches. I was surprised at how little information there was at the w140.com/Tekwiki. My 465 manual says opt 4 is EMI environmental. Is that true of the 485 also? It came with a CD of the service manual, but I'd like to get a nice hard copy original if anyone has one they are willing to part with. I can offer a 465 and RM45 manuals in good condition in exchange. -- Dave Manuals@... www.ArtekManuals.com
Kevin Oconnor All Messages By This Member #149830 My 585 manual says “with 485 EMI mod option 4 meets mil 1-618D req: power line conducted, 150khz -25mhz; radiated , 150khz-GHz [sic]. Don’t know what the mod is though. If someone knows, please post. Sent from kjo iPhone
Reginald Beardsley All Messages By This Member #149831 Not sure it will work, but I'm attaching a scan of the 465 manual pages describing the option. It's basic SMPS EMI filtering plus a mesh screen on the face of the CRT. I'm guessing the mesh screen was removed from mine at some point.

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