Thanks!
Now, lets do this step-by-step' systematically. You should first de-solder these terminals with pins. I don't understand why they used that type of connectors in the first place. To remove terminals without damaging board use technique shown in the video below. Just learn, don't do anything on the board, just make sure you understand and know how to do it.
Also, take a photo of your transformer and share it with us here.
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Hello! Thanks for your time! I guess they have used this kind of terminals because it is time-saving if they test them...plug and play and they have the Q.C. sticker on the board, so the boards should be tested...🙂
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This is my transformer. I have always liked toroidals. Maybe I will upgrade it...it is supposed to be better. Does someone tested the difference in sound quality between toroidal and this kind?
It is powered on by this softstart...
I have used this transformer to power a TDA7293(perhaps fake one-because of the price...) based board and it sound like my KENWOOD KRF-X9060D
amplifier. I did not perform extensive comparisons...just left channel Kenwood, right channel TDA7293 board...powered by the below transformer 20-0-20 did not hear difference at low power..This transformer makes some noise...do toroidals makes this kind of noise..or are they silent?
It is powered on by this softstart...
I have used this transformer to power a TDA7293(perhaps fake one-because of the price...) based board and it sound like my KENWOOD KRF-X9060D
amplifier. I did not perform extensive comparisons...just left channel Kenwood, right channel TDA7293 board...powered by the below transformer 20-0-20 did not hear difference at low power..This transformer makes some noise...do toroidals makes this kind of noise..or are they silent?
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I guess so.
Just remove them carefully and provide a photo or schematics of yout transformer.
You will need additional transformer for on-board speaker protection 230VAC to 2X12VAC. 10 VA should be enough. Look at the attached data sheet.
Meanwhile, prepare bulb protection for testing purposes. Here is how.
Hello! Thanks for your guidance...
The photo of my transformer is at #924
I have measured the capacitance between base and emitter of the desoldered perhaps fake Toshiba 2sc5200 and the result is 6.16 nF. Can this be used without catching our house on fire?🙂 Or shall I return the product?
I have already ordered the transformers and I have read about the bulb protection, i will prepare the setup, I also have
https://eur.vevor.com/variable-tran...Kh92bQZDXQpJ0-OAbZLy6f82gAiAlSuRoC4ZEQAvD_BwE
(I use it to power my big fan...at lower voltage and rpm...)
i guess i could use the variable transformer to power at lower voltage the 33-0-33 transformer?
..thanks again for your help..
The photo of my transformer is at #924
I have measured the capacitance between base and emitter of the desoldered perhaps fake Toshiba 2sc5200 and the result is 6.16 nF. Can this be used without catching our house on fire?🙂 Or shall I return the product?
I have already ordered the transformers and I have read about the bulb protection, i will prepare the setup, I also have
https://eur.vevor.com/variable-tran...Kh92bQZDXQpJ0-OAbZLy6f82gAiAlSuRoC4ZEQAvD_BwE
(I use it to power my big fan...at lower voltage and rpm...)
i guess i could use the variable transformer to power at lower voltage the 33-0-33 transformer?
..thanks again for your help..
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Be carefull with speaker protection transformer it should be with two separate secondaries. There is another type. center tapped seccondaries. That kind if transformer will cause hum.
This is correct:
This is wrong:
This is correct:
This is wrong:
Hello! I have ordered 2 separate transformers so it should be ok, I hope the 5W will be ok. 150W light bulb in series with the main power done according to post #925. Thanks to Berlusconi for that too...
Should I put thermal paste under the transistors and which brand?
Should I put thermal paste under the transistors and which brand?
htsz2006 You are a good guy but I would recommend reading the whole thread. The questions and answers are all here. I don't think anyone will have time to repeat what has already been published many times, no offense intended.😉