Sounds good. I'll buy one pair of FSSA board. Just send me the bill to my diyaudio email. Thanks.
Payment received. Your FSSA pcbs with Sanken VAS/driver transistors will ship this weekend.
Fab
Fab
Guys, is this the correct thread to talk (and other) about other amps???
It does not seem very delicate to me... 🙁
Yours truly,
M.
It does not seem very delicate to me... 🙁
Yours truly,
M.
You are right. We should use the FSSA build review thread instead to discuss FSSA.
Sorry about that.
Fab
Sorry about that.
Fab
This thread is dead and abandoned by its creator. I don't see any problem with discussing projects that serve as a help to abandoned and deceived users by LC
500W SMPS for class-A amplifiers with +-25VDC output voltage, in addition to
+-15V AUX, 12V & 3.3V & standby option, etc...
It is made for CLASS-A Amplifiers, tests already made on the M2X amplifier with great success.
This SMPS guarantees a low voltage drop at 5A idle current. for example in stereo mode or in dual mono.
More to show later.
Hi! I would like to know if anyone has a circuit diagram for the First one large module? Unfortunately, one of the pages is not working. We want to improve this. Thank you very much.
Yes, it can be tested for that amplifier, but I dont have one assembled here.
However, some results are below
SMPS output voltage in idle @ 230VAC = +-25VDC
SMPS loaded 6A output voltage is 45VDC
SMPS loaded 16A output voltage is 41VDC
SMPS can take 30000uF ~ 50000uF per rail as extra capacitance, still need to test the maximum value.
However, loading the SMPS with 6A will require a FAN.
The first sample was assembled yesterday.
Thanks
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Cresnet, I remember asking you about designing an SMPS for class A current but I was not aware you had succeeded
This quite impressive results you got.
Also, that is the first time I hear about an SMPS capable of handing that amount of extra capacitance.
USSA5 only requires about 1.5A per channel and uses square law effect of mosfet to maximize class A level.
Not sure I follow you when you say you have built a first sample yesterday but it has been tested on an M2X amp...🙄
I had problem with other SMPS in the past to perform proper amp grounding when there is only one ground terminal on the SMPS board. Is that the case for your SMPS?
Fab
This quite impressive results you got.
Also, that is the first time I hear about an SMPS capable of handing that amount of extra capacitance.
USSA5 only requires about 1.5A per channel and uses square law effect of mosfet to maximize class A level.
Not sure I follow you when you say you have built a first sample yesterday but it has been tested on an M2X amp...🙄
I had problem with other SMPS in the past to perform proper amp grounding when there is only one ground terminal on the SMPS board. Is that the case for your SMPS?
Fab
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Re. Additional capacitance: would it be possible to have an RC filter after the smps and use much more capacitance in the C part (R being close to 0.1 Ohm)
I would be very interested for that set up after seeing also Soulution using this method together with Meanwell HRP-600 models and in some models they have close to 500.000 uF capacitance per rail.
You can always use a slow-turn (relay or similar) to slowly charge the capacitors during power up through a resistor. After a few seconds, when the capacitors are full, the resistor can be bridged. This way you can use as much capacitance as you like with pretty much any SMPS.