Posts filed under: DIY Audio

As I’m about to move my Aikido Preamp to a new ‘home’ (I mean, new chassis), then it’s time to fix all the components used there. Before, I have tested several components on different section and later then I got...
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Still remember the first chapter here? I have transferred the paper mockup into digital format. It didn’t take long time to do that 😉 Just need to send (or print) this format and send to the manufacturer. I’m quite sure...
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As my chassis has done few days ago, now it’s time to design the placement of the parts. I have mentioned before that the dimension was quite tight, so I wasn’t sure that I could fit all the parts on...
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I did a stupid mistake. I ordered new chassis, but during the construction, I changed some parts and forgot if the new parts actually ‘lot’ bigger than the old one. Two most significant in terms of the size are Hashimoto...
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Last week, we held a simple DIY Blind Test session. The contenders were all Class A amplifier (we can see F5, J2, Aleph, TUMOS, and some others…) This was a hot session. Not just because the contenders were very good...
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“USB On-The-Go” is not really a new thing actually. But since I have ‘exiled’ myself from the glamorous gadget world, probably I have missed this one. So, I just acquire a Nokia E7, featured with USB On-The-Go. Basically, you can...
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One of must have software when simulating power supply is PSU Designer II or PSUD II. This amazing freeware could simulate your power supply behavior, before you start to assembly your circuit. Off course, not all looked good means good...
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Some people send me an email asking about how to measure cathode current and resistor rating. I will show you how to do it and actually this way is not only applicable for cathode resistor (but commonly used for that...
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Sometime I’m curious how hot your tube is? Well, this short experiment will give you some idea. Different tube may have different thermal characteristic (simple logic: the higher current on the filament, expect higher temperature). Off course we can use...
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Last upgrade, the switches. Basically, in most tube application, we will use two switches. The first is the main switch which will control the main AC voltage to supply the main transformer. The second one is the one which commonly...
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Not yet finished chassis. Quite huge for a preamp, around 42×42 cm in size. Some copper sheet shown on the picture for some section on the top plate....
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Finally, I finish assembling my AD1865 PCB which converts standard I2S to AD1865 LSBJ format. This idea comes from pavouk, which provides the schematic then later I follow to design the PCB. Credit to him for this project. So below...
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