Babysteps of 1kW Class D Rookie Amp

[fumac]

Re: Music inside

😎
Just started my first listening tests. And yes you can hear music with that thing. More than just noise.
Not so bad until now....
I have to do more detailed listening and compare it vs my analogue bipolar Rookie.

Fumac,
I am quite curious to see your designs soon. 🙂
In fact I have no experience how much difference you need for the modulation frequency. Your proposal of 50kHz looks reasonable, but might depend on your topology. If you have fixed frequencies U might even put them closer, i.e. 30kHz steps. If you have frequency shifting topologies it might be more difficult to determine the required difference....

50K is save and the test looks better.
why 50k
the osc is a RC or LC osc, the freq is not very Stability , so we use a 50k step.
A 30K STEP is not very good at test, is hard to filter it, is too close to 22k,and the 50k is easy than the 30k,
if i build a 10hz-30k or 10hz-50k DAMP(some body want),
the step will be 100k or 150k
this is my thinking.

welcome
if u like u can test it all night here,🙂 we are night man.


RG
FUMAC

 

[ChocoHolic]

...yesterday I met two nice guys....
Fumac...

 

[ChocoHolic]

...and his brother...

 

[ChocoHolic]

These guys are really cool.
Unfortunately my class D Rookie is still not reliable and I did not dare to carry it for some measurements.
...well, in the moment I discovered some driver suicide again...

But I carried along my analog Rookie! Have a look to:
http://www.diyaudio.com/forums/showthread.php?s=&postid=1178431#post1178431

 

[fumac]

ChocoHolic

what about ur project

my project is running in 500w rms to 4ohm now

very very low thd at high power

have time to goto my lab ?

 

[fumac]

100W 1k THD

 

[fumac]

100W 7K THD

 

[ChocoHolic]

....things are moving slowly. Just a question of time and priorities....
Furtheron I am focussing on DIYHIFI.org for my class D topic. There is at least one person, who is adding technical value, while here nobody does.