All posts by: Auw Jimmy

RCA 7N7 Vacuum Tube (to Replace 6SN7)

It’s always interesting to try something new – especially vacuum tube. Sometime you can get something from unknown thing. I’m quite sure we are familiar with 6SN7 vacuum tube, which...... Read More

Universal Tube Power Supply Unit Design Plan

As a DIY, I think it’s important to have a dedicated power supply module. I have tried several design, but finally got tired if I have to finalized the build...... Read More

J&K Audio Design Custom Level 4 Power Transformer

After a long time waiting, finally I got this transformer on hand – myself. This is the Ultimate Level 4 Power Transformer from J&K Audio Design. You can read some...... Read More

Burson Supreme Sound OpAmp 4th Generation First Impression [Continued]

My first impression was here which you can look around if you haven’t read that. Last time, I ordered 5 pcs of Burson Audio Discrete OpAmp for my ASUS Xonar...... Read More

Indonesia Hi-End Audio Club IHEAC Show 2014

Last week, located at Hotel Menara Peninsula, Jakarta, Indonesia, Indonesia Hi-End Audio Club or IHEAC held a high end Audio Video show. This is the 3rd show held by IHEAC...... Read More

Testing J&K Audio Design Custom Power Transformer

Due to shortage of some materials, my custom transformers were delayed a bit. I haven’t got chance to arrange the pickup yet, so I ask Ken to give a quick test...... Read More

Burson Supreme Sound OpAmp 4th Generation First Impression

OpAmp. Well, what’s inside your mind when reading word “OpAmp”? A tiny chip with several pins? Could be. Actually, there are several ways to get the job done. First, we...... Read More

J&K Audio Design Custom Power Transformer (More Pictures)

Ken sent me more pictures. It would be interesting as the production is entering the final stage. I will not write much about this transformer as I have done that...... Read More

J&K Audio Design Custom Power Transformer

I have spent quite a lot of time to find a good transformer maker who can build something “beyond ordinary”. That means something standard (or a bit above standard) is...... Read More

Online Triode Loadline Calculator

There is an interesting website which allows us to simulate the triode loadline, or in other words: Triode Loadline Calculator. The link is here. You can easily drag-and-drop the curver...... Read More

Repairing Broken Peerless/Tymphany P830985 Full Range Driver

I got this Tymphany driver from broken Bluetooth speaker. First, I don’t expect I would see anything special inside a broken Bluetooh speaker. But I’m wrong. The driver used is...... Read More

News: Kharma Exquisite P1000

When enough is never enough! I think that would be a proper statement for this new approach from Kharma. Welcome, the Kharma Exquisite P1000 amplifier. I have no plan to...... Read More