without trimmer or bias.

[norstar815]

hi guys,

i wonder if there's a high power amp say 200w/8R rms that has no trimmer bias. i mean... just put on all the parts and that's it!

i think i've seen one of it in the net but lost the detail as our co
change my pc, if i recall it was a quasi comp, uses TL071 on the input and also a high end amp.

i've tried to make marcus m250 but no luck, i also made some
LM3886 chip amp but my brother took it so... nothing left for me
now. though, im a newbie and learning electronic stuff by making actual projects becomes my hobby, also i can etch my own pcb.

hope some of you guys can help me here... thanks!


john

 

[richie00boy]

Why do you want such a thing? Setting bias is not hard. Just use a decent quality cermet trimmer.

The problem with poor bias control is that the sound will not be at it's best.

 

[Jan Dupont]

A good trimmer is necessarry......
Or you can build an amp that uses Onsemi's Thermal Track output devices

 

[Eva]

Plain class B does not need bias adjustment...