Posted on Saturday, 15th August 2009 by Auw Jimmy

Still remember my Aikido project? Until now, I’m still using Octal socket (since most of my rectifiers are Octal based, like 5U4, GZ37, etc).  Few weeks ago, I was poisoned with RGN Rectifier. Well, I knew this tube for long time, but just that time was poisoned badly. Have no choice, got to get one at eBay.

How do I use it on my Aikido? I’m too lazy to modify the socket, I decide to create a DIY Socket Converter, from B4 to Octal.

Most European tubes use this Socket. But in this project, I will specify the usage for RGN Rectifier tubes. Most of my RGN will use 4 Volt heater, while the standard Octal will use 5 Volt. What should I do? Piece of cake, just put 2 Resistors in both heaters line. Considering the RGN will consume around 1 A current, then 0.5R will do perfectly to drop from 5 Volt to around 4 Volt (I prefer to use 0.33R each to drop to 4.3 Volt, in case my main line drop a little bit at night).

Below is the necessary parts

An empty Octal socket, B4/B5 Socket, and two 0.33R resistors.

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Tags: Aikido, B4 Socket, DIY Audio, Octal Socket, RGN
Posted in DIY Audio | Comments (3)