More to the point, does that lab supply really need a cushion for a hat? Maybe it's running too cool?
(I know you probably just wanted to shade the meters for a better photo)
I like to sleep with my lab power supply. Hahahaha
Outputs should have symmetrical spacing like the F5 Boards. If need be, make the PCB longer to accommodate the transformer.
That would be the ideal scenario but moving mosfet to next spacing hole would definitely be a huge improvement without any modification to pcb dimensions.
hi oreo, don´t know about how the cap is involved soundwise, but my F6 seems to developed to a little more bright/right side for me. Wait at least two days. Maybe it´s my woodoo thinking and because of tweaking the speakers a little i lost reference somehow.
for the resistors, i changed the feedback (a second 100 ohm to make it 50 ohm) what made it a bit more foreward but also a little more tight, less lush. i went back to the original.
For the source R´s, i changed R2 from .56 to .47 and one could say it was clearer, but for me the soundstage, depth, was more flattend. So i went back to original too.
i like it better now
I have been playing around with a sim and found that the most effect on distortion ratio is the capacitor. Specifically reducing the value from 1000 to 220uF increases the 2nd harmonic from -102db to -88db. The 3rd stays the same, I think its a function of the transformer. This is 1 watt into 8 ohms, 1khz sine wave. 1st harmonic at +9.5db. Changing the resistors from 0.56 to 0.47 didn't do anything in that respect. Upping the bias reduces overall distortion across the board. I don't know if -88 from -102 would be audible. I know some people claim more 2nd is agreeable. I simmed my Aleph J and found it has more 2nd than 3rd at 1 watt and I like its sound a lot.
Thats my 2 cents worth.
If changing resistors doesn't affect harmonic distortion profile you must be doing something wrong.
The phase of the 2nd went from 21 to 25 deg. The db level was essentially the same. What have you found with your sim?
I don't use those jfet models, if you provide the models then yes I can run the sim. Are these models matched for Idss?