This Design Idea is a reprint of an earlier one that contained errors in graphics (Reference 1). Even though 6L6 beam-power tubes have been around for 66 years, they are still quite popular for use in ...

Juergen Grau located in Rohrbach, Germany has designed and created a new STC Super Triode connection power amplifier Mk II Bausatz which has this week launched by a Kickstarter to raise the required ...

Please note: Due to publication error, we will be rerunning a corrected version of this Design Idea in our June 12th issue. We apologize for the error. Control grid ...