Posted on Wednesday, 14th October 2009 by Jimmy Auw

I have made RGN/B4/B5 to Octal Converter few weeks ago. Actually, the converter was made for 1A RGN Rectifier (because of the resistor drop value). I put 2 x 0.5 Ohm to drop 1V from 5V to 4V. With 1V voltage drop and around 1A current, I expect around 1W power dissipation. So this 6.5W Dale resistor should be fine (although a little bit warm after several hours of usage).

Later, I decided to make a new converter for 2A RGN Rectifier. Assuming 2A current and 1V voltage drop, the 5W or 6.5W Dale resistor should be fine, right? Wrong!!! My 5W Dale resistor got overheated (completely untouchable by hand) around 30 minutes of operational time.

Was I losing my math? I didn’t know.

So, I made another converter consisting two resistor in parallel. So the total power dissipation should be around 13W (2 x 6.5W). We’ll see whether those will get overheated again or not

Tags: Dale, RGN Rectifier
Posted in DIY Audio | Comments (2)

Posted on Thursday, 24th September 2009 by Jimmy Auw

Due to generosity of my friend, let’s call him “Mr. S”, I manage to secure two more RGN Rectifier and add it to my collection. Welcome the Telefunken RGN 2004 and Telefunken RGN 1054! Both are mesh version!

The RGN 2004 is the “short-fat globe” version. I suspect this is the older version. Usually, the newer version has taller/bigger globe.

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Tags: rectifier, RGN, RGN Rectifier
Posted in Collectible Stuff | Comments (0)

Posted on Sunday, 28th June 2009 by Jimmy Auw

Just returned from a tired yet “deadly poisonous” DIY Gathering. We held an extra session with RGN 1054 Mesh Plate Rectifier and Duelund Capacitor installed on Aikido Pre-Amplifier (6N1P and 6N6P tubes). Before, the Aikido used Obbligato Capacitor bypassed with K72 Russian Teflon and 5U4G-B Sovtek Rectifier.

The result of this “simple” modification? A deadly Aikido Pre-Amplifier, even dare to compare with DHT Pre-Amplifier. Sweet, liquid, transparent, tight bass, and excellent speed. If before you have to choose between speed/dynamic (Aikido) and sweet vocal (most DHT), now you can get both on this!!!

Absolutely amazing. The test system supported with Audio Aero Capitole CD Player and 17W Class A MOSFET DIY Amplifier.

Tags: Aikido, Duelund, RGN Rectifier
Posted in Collectible Stuff, DIY Audio | Comments (3)