Hi All
I have been listening to my 6L6GC Single Ended amplifier through my Lowther loaded Jericho horns for a few months. The sound leaves little to be desired for, but I suspect the transformers can be upgraded.
I headed off to Yves's Output Design Assistant for some indication of what needs to be done:
Specifications:
I was surprised to see that the transformer is going to be rather large. To keep the losses/leakage inductance/primary impedance within spec, I had to opt for EI114 laminations!
I would have loved to have the flux closer to 0.5 Tesla, but this configuration seems to satisfy all the other specifications. I guess I can experiment with different air gaps when the transformers are rolled.
This seems acceptable (I hope :
)
This would be a significant improvement of what I currently have in my amp.
I have been listening to my 6L6GC Single Ended amplifier through my Lowther loaded Jericho horns for a few months. The sound leaves little to be desired for, but I suspect the transformers can be upgraded.
I headed off to Yves's Output Design Assistant for some indication of what needs to be done:
Specifications:
- 15 watt power rating
- 20Hz to 20kHz bandwidth
- 3000 ohm Primary Impedance into a 6 Ohm speaker load
- 24 Henry minimum primary inductance
- low leakage inductance
- less than 10% losses in iron and copper
- try to keep flux low (<1Tesla)
I was surprised to see that the transformer is going to be rather large. To keep the losses/leakage inductance/primary impedance within spec, I had to opt for EI114 laminations!
I would have loved to have the flux closer to 0.5 Tesla, but this configuration seems to satisfy all the other specifications. I guess I can experiment with different air gaps when the transformers are rolled.
This seems acceptable (I hope :
)
This would be a significant improvement of what I currently have in my amp.
