This article covers another TV Damper tube: The 6DQ4. Although I covered already several different TV dampers, these are worthwhile the attention since they are fabulous for rectifier duty.
The 6DQ4 is pretty much identical to the 6AX4 electrically. Please refer to the 6AX4 Tube of the Month article of last year for the technical paramters and application of the tube in audio amplifier power supplies. In this article I will show the construction details of this tube.
Like most TV dampers, the 6DQ4 was manufactured by many different companies, here just a few brands: