While they last...

MR's L'amp variation is scalable, so it's pretty easy to build a 30W SE with Token based on his schematics. The most efficient way is using a choke, then CCS. I guess we can build a 25-30W stereo amp in regular 100Wx2 chassis with 2 chokes. It may require a pair of quiet Noctua fan though.
 
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I think the Singing Bush is closer to 35W.

In order to have 30W single ended and less heat sinking, current source load or resistor load has to be avoided as they require heat sinking to dissipate heat. So choke or light bulb loading.
 
You're quite right Soundhappy. Sir Rothacher has done some wonderful work and generously shared it all with us.


Thank you too for your great SIT work!
:cheers:

Cheers :^)
 

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though, not necessary SE

lower heat SE (vs. Singing Bush) - Greedy Boyz already did, using choke as a load

no other way to have high enough voltage across SIT (it's a must to keep THD at least so-so at bay), without skyrocething with heat)

so, DEF is a way

lhquam already made his own, and I'll have something in future

Pa ......... well, he's Pa

as usual - you can expect Blasphemy from him, any moment, any day ........ (just when you think that you've seen it all, there he is ..... )

:rofl:
 
A many years ago pioneer DIY projects work was made by Mr. Michael Rothacher

aka AudioMaker | DIY Audio Projects, Etc.

He bring us first Sony Vfet's discovering on the forum and construction articles
and in year 2014 show high power Tokin 2SK180 , SIT modeling software,
how build curve tracer and much more..

VLOG #1: Curve Tracer, Big VFET, SIT Modelling, Ironamp - YouTube

Thanks Sir Rothacher for all fabulous energy and teaching 🙂 Kind regards

There's more fun on the horizon. I promise. :snail: