As  my Sowter Choke Input was acquisitioned by my friend. Then I have to consider some replacement. Actually my friend was interested with Hashimoto or similar, but as most of...... Read More

“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...... Read More

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...... Read More

I have been a fan for Black Gate for quite long time. My first time impression probably nearly 10 years ago. I forgot whether I heard SKz or WKz at...... Read More

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...... Read More

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...... Read More

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...... Read More

This is the final choke upgrade that I’ve been waiting for quite long time. After some discussion on the phone with Brian (1 day before his birthday), finally I finalized...... Read More

A special edition of MJ Audio Technology Magazine from Japan. A must have for 300B/2A3 lover! Quite expensive, especially if you buy it outside Japan.... Read More

After a long journey listening hundreds of tracks, finally I come up with JimmyAuw.com Reference CD #1. This CD, off course due to law regulation, are made by me and...... Read More

To tweak a lot of things, usually I reserve a good set of tweaking tools. One of them is the tape. The function, mostly, is to seal something (wire/chassis/transformer) in...... Read More

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.... Read More