To supply the heaters of my breadboarded Aikido headphone amp (using 6CG7 and 6H30) I have built a regulator according to this schematic (drawn by me but pretty much taken from different sources)
[IMGDEAD]http://xs224.xs.to/xs224/08062/dc_heater-reg673.jpg.xs.jpg[/IMGDEAD]
Combined current draw will be around 2.8 A which scares me just a little bit...
The smoke test went fine with the regulator putting out a steady 6.4V. This thing generates a lot of heat but the heatsink on the LM 1084 was just warm to the touch after a few minutes. The 50W ballast resistor had to take a real beating and got mighty warm...!
I had to adjust a few things (like changing the potential divider to higher values, now 1.2k / 4.7k) and I will heatsink the R68 dropping resistor.
Apart from the obvious things like providing adequate cooling and such I would like to have the opinion of the experts:
- Anything I missed?
- Anything I could do better?
As always thank you!
[IMGDEAD]http://xs124.xs.to/xs124/08062/6.3v-regulator697.jpg.xs.jpg[/IMGDEAD]
[IMGDEAD]http://xs224.xs.to/xs224/08062/dc_heater-reg673.jpg.xs.jpg[/IMGDEAD]
Combined current draw will be around 2.8 A which scares me just a little bit...
The smoke test went fine with the regulator putting out a steady 6.4V. This thing generates a lot of heat but the heatsink on the LM 1084 was just warm to the touch after a few minutes. The 50W ballast resistor had to take a real beating and got mighty warm...!
I had to adjust a few things (like changing the potential divider to higher values, now 1.2k / 4.7k) and I will heatsink the R68 dropping resistor.
Apart from the obvious things like providing adequate cooling and such I would like to have the opinion of the experts:
- Anything I missed?
- Anything I could do better?
As always thank you!
[IMGDEAD]http://xs124.xs.to/xs124/08062/6.3v-regulator697.jpg.xs.jpg[/IMGDEAD]