Monthly Archives: April 2009

Beautiful Glowing Tubes This Week

I dig my tube boxes and found this old tube. Not a really expensive or most wanted tube, yeah… just an old Western Electric 393A tube. It’s a Argon and Mercury Vapor filled Thyratron tube. According to the datasheet, the...
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“Perfectionist” Design

Being a perfectionist is not easy (and not cheap). Still remember my ambitious project before? I want to make it perfect, so let’s start the 1st phase, testing the capacitor (I mean, the Black Gate) 😉 I will use 60...
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Single Ended Amplifier Weekend Benchmarking Session

It’s time for Single Ended amplifier benchmarking session. Located at Bakmi Margonda, Sarinah, Indonesia. Here is some shoot from the event. The system was very simple, Tannoy speaker, Audio Aero Capitole CDP, and AirTight 300B as Reference Amplifier....
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Beautiful Glowing Tubes

One factor that makes me like tube is its glow. Well, it’s hard to explain, but some tubes have a beautiful color, especially in dark room. Here is some of them. Below is the 0A3/VR75 tube. It has red/fire color....
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Weekend Tube Testing with Knight 600 Tube Tester

After previous trip to “trash bin” shop, now it’s the time to test it 😉 So I open my old Knight 600 Tube Tester and fire it up. Picture below shows my Knight 600 testing Amperex 6BQ5/EL84 tube. Not bad!...
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Amperex 6BQ5/EL84

Amperex 6BQ5/EL84 from “trash bin” shop 😉 Not bad for some cheap experiment!...
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Black Gate F Series Gainclone Power Bank

As I’ve promised before, my Gainclone project will be supplied with special smoothing capacitors. Welcome, the Black Gate F Series 680uF/65V. Each rail (positive and negative) will have 30 pcs of Black Gate capacitor, with total around 20.000uF capacitance each...
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Digital Volume Control

I’m thinking of a digital volume control, instead of passive one (with potentiometer or stepped attenuator). Hmm… Searching around the net, I found some IC from Maxim. I grabbed some (with different packaging and functionality). Now I need to think...
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