50w Single-Ended BAF2015 Schade Enabled

[Soundhappy]

Nice heatsink you got there

33 lbs = 15 kg of weight one piece.
Hope try with them powerful Tokin SIT´s

Greetings

 

[Dennis Hui]

Fun time ahead.

 

[Zen Mod]

.....
Metal drill work on heat sink's is now ready and I completed all components exception small bias psu.
Let's run hot IXYS hockey pucks

impressive

though ..... you'll need two of these books ......... one under each heatsink , with pages constantly flapping , to push some forced air through fins , simply because those heatsinks are made for that

only in case that heatsinks are soooo big , their loss of efficiency in natural air flow conditions could be still irrelevant

Hope that's the case here , easy to check with temp. thingy

 

[Soundhappy]

Thanks Zen Mod

Keep a large comfortable open space and distance from the floor make breath the two heat sink's in the natural convection way.
Hot air particles " jumping " always up and we get moving them all the time.
With fans is more efficient, but silence is the best music friend.
I am confident about capability, but I do temperature test.
It's " never too much heat sinks " example for sure.

Questions : What about 4.7 V ?
Any verified bias psu options ? Some better that others for audio ?

Ah i need jfet buffer it's for amp impedance match with audio source and AVC knob.
IXYS with his 20 dB of gain are plenty

 

[Soundhappy]

Schade 50 are simulation of Digital-Do-Main 2SK77B.
Please any news , article or audio show from busy Mr Pass about this triode semiconductor amp in the future ?
Mystery species kind

 

[vdi_nenna]

Happy, please post your thought on the sound of the 50W SE when finished. Thanks!

 

[Soundhappy]

Happy, please post your thought on the sound of the 50W SE when finished. Thanks!

Yes I do write Vdi_Nenna.
It's be prototype version with other brand high quality input transformer.
Greetings

 

[Zen Mod]

Happy , can you post link to origin of these pics ?

just curious about their plans of re-producing these gorgeous drivers

 

[Soundhappy]

Hi Mighty
Oops,sorry I don't save any Digital-Do-Main links for this audio product show, was happening in Japan.
Start with research: Digital do MaiN - Wikipedia

I am curious too , such exotic drivers

 

[Zen Mod]

RCA LC1B , though I think these on do-main pics are further customized , besides fact that lower ones are working as bass only

 

[Soundhappy]

RCA LC1B , though I think these on do-main pics are further customized , besides fact that lower ones are working as bass only

Amazing ZM thanks for the info

 

[Soundhappy]

Work in progress on CCS proto boards

 

[Soundhappy]

FAB style

 

[vdi_nenna]

 

[Soundhappy]

Audio signal board prototype with CCS on the heat sink, all connections are point-to-point

 

[Zen Mod]

looking good

though , slightly too clean environment

 

[Soundhappy]

looking good

though , slightly too clean environment

Thanks Vdi_N and ZM is worth of the good time on work bench.

@ Diyers
Now choice of 4V7 psu for bias.
Need go to the shop in town and search, buy few components.
LM317 ?
I have lot of IRFP's and LM 341 and little xformer 9 V sec.

 

[Soundhappy]

Circuit with TL431 and IRF240 ?

 

[Zen Mod]

small CCS plus 4 Green LEDs in series , then trimpot across them ?

 

[Soundhappy]

Mr. Nelson Pass at BAF 2015
Me watch again Papa video about 2SK77B amp & his simulation with IXFN