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50w Single-Ended BAF2015 Schade Enabled
50w Single-Ended BAF2015 Schade Enabled
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Old 14th June 2018, 11:19 PM   #571
dmy is online now dmy  United States
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Quote:
Originally Posted by Soundhappy View Post
Oh, I see it now. My transformers and caps should be fine for this amp. I will start to order rest of the parts.

Thanks
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Old 14th June 2018, 11:25 PM   #572
Soundhappy is offline Soundhappy  France
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Originally Posted by dmy View Post
Thanks for your input.

But the transformer secondary is measured at 49v AC, DC can then be up to 69v (49x1.4)?
Maybe it will come back down when the circuit start to draw power?
It's Single-Ended amp
49V X 1.2 = 58.8V
50V x 1.2 = 60V DC
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Old 14th June 2018, 11:41 PM   #573
Soundhappy is offline Soundhappy  France
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Originally Posted by dmy View Post
.... My transformers and caps should be fine for this amp....
Yes OK get ~ 59V is only 1V less not that critical imho
What Your psu toroids VA total power ? 500 or more ?
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Old 15th June 2018, 12:00 AM   #574
dmy is online now dmy  United States
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Originally Posted by Soundhappy View Post
Yes OK get ~ 59V is only 1V less not that critical imho
What Your psu toroids VA total power ? 500 or more ?
It is rated at 10A, roughly 500VA. I have 2, so one for each channel.
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Old 15th June 2018, 03:31 PM   #575
Botte is offline Botte  United States
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Soundhappy,

So what does this amp sound like compared to your other First Watt efforts?

Thanks,
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Old 20th June 2018, 09:55 PM   #576
Soundhappy is offline Soundhappy  France
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Hi Botte

After the builds of Aleph J, M2, Schade 50W, Big MoFo and Vfet L'Amp with choke load is not easy to compare to each other beacause they do not work in the same conditions , match better with one or another tube preamp or solid state or buffered passive preamp with autoformer volume control ( M2) for example.
MoFo , Schade 50W and L'Amp have point-to-point wiring so easy to try swapping different capacitors ( Elna, Nichicon,Vima , styroflex , oil and much more....)
and resistotors ( from the old school carbon composition , metal films, wire wounds and metal bulk foils etc.) and various jfet's buffers, gain stages and the power stage semiconductors bias points as well.
Experimentations efforts was dedicated to the music.
Try reproducted with little of colorations on recorded music with acoustic instruments :
concert piano, strings, winds or singers voices.
All amplifiers are highly equaly interesting all have his strengs with patiently chosen audio source ,
preamp ( desirable impedance ) , amp and finaly the speakers
( my is 12" alnico wide ranges or compresion with horns , from time to time I do use Onken style sub ).
Conclusion: Me no more focus only on the power amp but see him like interactive element of complete audio system.
Flea watts sing wonderful with efficient compression drivers & horns.
My Diy Schade 50Watt's with 3H and 2Harmonics negative phase switch give possibility to try different sound signatures
" on the fly " and can play good audio with less demanding speakers.
If Your audio card have balanced outputs , 98 dB speakers go for nice single-ended Aleph Jedi
Have fun is Class A audio game !
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