Acorn Archimedes A305 Restoration: Audio Fix! Filter Mod & Burr-Brown Op Amp Upgrade

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Published on September 4, 2020 7:14:31 PM ● Video Link: https://www.youtube.com/watch?v=8Dk2-kwR9ys

Duration: 16:42

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Ever wanted to fix that dull, flat, muted audio on your Acorn Archimedes? In this HOWTO I'll show you how to upgrade your Archie's audio by fitting a higher spec op amp and removing some unneccessary filtering components for the best possible output.

Relevant Links:
Previous Archimedes Restoration Update: https://youtu.be/xk0z6wG_xzs
Zarchos YouTube Channel: https://www.youtube.com/user/Archimedes75009
Simple DIY method to get unfiltered high quality sound on your Archimedes: https://stardot.org.uk/forums/viewtopic.php?f=16&t=13630&sid=c2e7083471210bd4ad4bf27c18fdb4c5
Better sound for the Archimedes with OPA4134PA Burr Brown OA: https://stardot.org.uk/forums/viewtopic.php?t=11287
Steve Harrison's Website (inc QTM tracker): http://pi-star.co.uk/

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Chapters:
00:00 Intro
00:29 History Of The Archimedes
02:02 Teardown
03:24 Motherboard Exploration
04:38 Op Amp Upgrade HOWTO
05:33 Filtering Explanation & Mod Background
06:28 Filter Mod HOWTO
10:00 Reassembly
11:48 Before & After Comparison: Cannon Fodder
14:23 Before & After Comparison: Magic Pockets
15:38 Conclusions & Outro

Music Credit:
Royalty-Free Music From Epidemic Sound: https://www.epidemicsound.com