2x24v AC independent.
Picture below, the outputs E2 and S1 are connected with a strap on the rear(not visible on the picture).
Picture below, the outputs E2 and S1 are connected with a strap on the rear(not visible on the picture).
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Is there a possibility that your midpoint is formed wrong such that you had single rectification when you noticed hum and not double rectification?
My caps are dead -_-
So, maybe I will check for assemble a power amplifier with discrete components, for example :
Project 62 – BuildAudioAmps
or
Project 61 – BuildAudioAmps
Somebody here as already tested the amplifier from this website ?
So, maybe I will check for assemble a power amplifier with discrete components, for example :
Project 62 – BuildAudioAmps
or
Project 61 – BuildAudioAmps
Somebody here as already tested the amplifier from this website ?
Last edited:
Sorry to hear about your caps. I assume you mean your 10000uF/100V caps.
Your TDA8954TH board seems to be OK because it seems to work with your SMPS supply. What happened when you tried to make your own power supply I cannot say.
I do not know that discrete board. It looks fine. In general it is not easier to make a discrete design work than a board based on an integrated circuit. If the discrete design starts oscillating, real problems are ahead.
Your TDA8954TH board seems to be OK because it seems to work with your SMPS supply. What happened when you tried to make your own power supply I cannot say.
I do not know that discrete board. It looks fine. In general it is not easier to make a discrete design work than a board based on an integrated circuit. If the discrete design starts oscillating, real problems are ahead.
Yep, it is the 10000µ.
It's totally incomprehensible , because I tested the caps before the first start, and I meseared 11000µ, and the "resistor value" beetwen "+" and "-" is OK (no shorcut for example, and the value increase from 0 to infinite).
So, my goal is to build a good amplifier for my office, I'm want a good power (100 to 120 arround), and a good sound quality, for a low price..
I don't know if the TDA is a good choice in fact, because for example, when I see the finesse of each tracks on the outputs on this board, I can't stop to tell me that it is not possible to obtain more than 40-50W...
I have some LME49811 on my side, some LM4702 too... Maybe I can make something with this !
It's totally incomprehensible , because I tested the caps before the first start, and I meseared 11000µ, and the "resistor value" beetwen "+" and "-" is OK (no shorcut for example, and the value increase from 0 to infinite).
So, my goal is to build a good amplifier for my office, I'm want a good power (100 to 120 arround), and a good sound quality, for a low price..
I don't know if the TDA is a good choice in fact, because for example, when I see the finesse of each tracks on the outputs on this board, I can't stop to tell me that it is not possible to obtain more than 40-50W...
I have some LME49811 on my side, some LM4702 too... Maybe I can make something with this !
I have three different TDA8954TH boards and they work fine, after modification. The TDA8954 chip is not bad in itself. I do not know your board.
Yeah, it is the problem, nobody know this board, and there is absolutly nothing like scheatic and other..
I bought this board because there was a good price (13euros with discount!)
I bought this board because there was a good price (13euros with discount!)
Yep !
So I used the amp on my ES90 speakers, and.. Very punchy, big power, but I'm not impressive by the quality of the sound. This amp need a preamp for adjust treble, because the trebles are too high compared to the bass and medium.
I think that I will disasesemble my old ONKYO SR606 for using the transfomer, power stage, and some other components for create an AB amplifier.
I will create an other topic in the good section 🙂
So I used the amp on my ES90 speakers, and.. Very punchy, big power, but I'm not impressive by the quality of the sound. This amp need a preamp for adjust treble, because the trebles are too high compared to the bass and medium.
I think that I will disasesemble my old ONKYO SR606 for using the transfomer, power stage, and some other components for create an AB amplifier.
I will create an other topic in the good section 🙂