The On Semi parts can directly replace the Sanken parts. No changes needed other than larger driver heat sinks.
Don't the drivers share the same heatsink as the output transistors?
Are there any LTSpice simulations with this output and bias arrangement?
Are there any LTSpice simulations with this output and bias arrangement?
In the 3-pair version they don't. In the 6-pair version they do 🙂
I use Multisim, so I have many simulations in Multisim.
It's actually Vbe difference between the Sanken and ON Semi devices due to some manufacturing specifics. Not really important - a matter of a single R value amendment (R30 in the schematic from the post #2874).
If I recall correctly earlier versions of this amp required some adjustment to driver current due to higher LED forward voltage than expected. I'll fine tune everything before any further testing.
That's right
Plus we have switched to the red LEDs here, so some reference voltage deviations may occur.I actually find it kind of boring when a new design fires up with no glitches. I enjoy troubleshooting problems.
It's running nicely now. I did some quick scope tests with +/- 56V rails with teh X4-JFET input and an 8 ohm dummy load. I gave it a short audition too, sounds great, very punchy bass! Dead silent with no signal as always.
Pictures are 1k sine at clipping, 1k square waves, 50k square waves at 100k sine.
Next I need to put together a chassis with proper cooling so I can done some proper high power testing and stereo audition.
Pictures are 1k sine at clipping, 1k square waves, 50k square waves at 100k sine.
Next I need to put together a chassis with proper cooling so I can done some proper high power testing and stereo audition.
Attachments
This is in regards to the new 600watt beast coming up soon? Would this be mono blockable? and could we use a tube input stage?