Cover plate for Chinese dual AK4490 DAC board
Description
This Is A Face Plate/Cover Plate For My Chinese Dual Ak4490 Dac. It Is Pretty Thick (3Mm), But My First Try Was Just Too Wobbly. The Plate Can Be Screwed To The Cinch And Optical Ports And Also Has An Extrusion To Fix It To The Two Mounting Holes On The Pcb. I Didn'T Note Down What Screws I Bought, But They'Re Just Cheap Screws From The Hardware Store. Measurements: 8.14Mm Overall Length, 5.5Mm Shaft Length; Head Has 5.44Mm Diameter, Shaft 2.86. So I Suppose It'S A M2X5.5. The Design Had One Small Bug, Which Is Fixed In Rev1: Since I Made The "Pcb Screw Hole Mounts" Larger Than Required (To Compensate For Any Measurement Errors), I Had To Add A Spacing For The Resistor At The Coax Input - But I Put It On The Wrong Side (And Had To Cut It Away). This Was Fixed By Shortening The Mounts From 12Mm To 9Mm. While At It, I Uploaded The Autodesk Inventor 2018 Source File. The Dac Is This One: Https://Www.Aliexpress.Com/Wholesale?Searchtext=Double+Ak4490Eq+Board (I Got Mine From "Hifi College Store). Btw: I Could Reduce The Usb Noise By Adding A Low Pass To The My Usb Cables Voltage Supply Lines. It'S Not As Good As Isolating The Dac From The Pc Ground, But It Was A Cheap Solution That Worked Very Well. There Is Only Some Faint Noise With Silence Playing At Maximum Amplification (Which Would Reach About 110Db To 111Db Maximum Spl With My System).
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