Aber gerne ! 😀
Looks good
although if I had to make it again I would put MOSFETs on shorter sides of PCB to add some more space between them, like this (post #963 and #972) :
http://www.diyaudio.com/forums/pass-labs/121228-f5-power-amplifier-20.html#post1525502
Anyway, it's not critical here because power supply voltage is +/-16V and the Id is about 0.8A, so Pd per MOSFET is 13W only.
Looks good

http://www.diyaudio.com/forums/pass-labs/121228-f5-power-amplifier-20.html#post1525502
Anyway, it's not critical here because power supply voltage is +/-16V and the Id is about 0.8A, so Pd per MOSFET is 13W only.
Power supply. I´ll go mono and 2 versions: with CMC (WE) or resistor (SMQ). Schottkys are FSV1045V.
JP
JP
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Hello Juma,
Is it possible to make BA3 output with latfet?
would you share the schematic please? 😀
Thanks.
Is it possible to make BA3 output with latfet?
would you share the schematic please? 😀
Thanks.
well... done!
Will build it for a friend (2SJ74GR, 2SJ162, 2SK1058 Reichelt, 2SK170GR Dönberg).
Ok, let make the power supplies...
JP
are you sure that they aren't fake?
especially the j74 and k170
Hi Juma,
Is it possible to reduce power even further ? An output of 3w Class A / 6w Class AB would be nice. I already have a 3w SE Mosfet. Cubie push pull would be a nice addition.
What is the output impedance ?
Thanks.
Is it possible to reduce power even further ? An output of 3w Class A / 6w Class AB would be nice. I already have a 3w SE Mosfet. Cubie push pull would be a nice addition.
What is the output impedance ?
Thanks.
Hi vizion,
lowering the PS voltage to about +/-12V is the obvious way to do it.
Zout is less than 0.1 Ohm
lowering the PS voltage to about +/-12V is the obvious way to do it.
Zout is less than 0.1 Ohm
hello Juma,
if i want to build this cubie for 50watt output power
how many pairs do i have to pararel the output TR?
is it still the same voltage rails and bias settings?
thanks.
peter
if i want to build this cubie for 50watt output power
how many pairs do i have to pararel the output TR?
is it still the same voltage rails and bias settings?
thanks.
peter
hello Dennis,
i am thinking of common source topologies, while cubie3 is common drain.
in my opinion common source has a magical sounding, like F5 amp.
hello Juma,
if i want to build this cubie for 50watt output power
how many pairs do i have to pararel the output TR?
is it still the same voltage rails and bias settings?
50W @ 8R means higher voltage power rails and cascoding JFETs at least, so it would be practically a new design.
Just adding more output pairs would take you to 50W only if you use very low Z speakers (1-2 R)
Wondering if I could try with a single transformer 2x15 transformer only, PSU is 25mF - 2.2mH - 25mF per rail ? Trying to put a finished amp case I have around to use... Thanks
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