A60(+) Amplifier. Build this?

[sajti]

I use mica pads, and silicon grease since years, without any issue. Don't need to overcomplicate it...

 

[Paroxod4]

Nobody denies the options. I gave up mica long ago, after a breakdown of 2 outputs at a client. Branded device. If there are new materials, why not use it? A tube is enough, spreading it is not like a bun with butter.🙂

 

[sajti]

I can understand your point of view, but why would i change, if i never had problem with it? I have hundreds of mica washers...

 

[Paroxod4]

If everything is good, then of course don’t change.😉

 

[Paroxod4]

Time-tested and reliable.😉

 

[htsz2006]

It seems like at the input 3-pin connector the side pins are signal and center is ground. Perheps if you feed left and right channel it makes it mono.

 

[Paroxod4]

Each board is a monoboard. 😉You were advised to unsolder the connector. Ring each contact with a multimeter. Where are they connected.

 

[htsz2006]

Hello!
Thanks for all your advices. I do not understand why should I unsolder the connector...I may find a connector that fits.
The left and right pins are in connection, the multimeter beeps....and the pin that is not marked goes to a resistor(like in a stereo to mono converter cable...).

 

[Paroxod4]

The input contact is a low-current. The contact of this connector is resistance and distortion. You want to make a cool amplifier, so why do you need extra hardware in the audio circuit?))

 

[htsz2006]

Yes it is +1cm in the low-current circuit..I do not think it is measurable or audible difference and I do not want to stress the circuit with my inexperienced soldering skills...🙂

 

[Hifi-Dan]

Hello-

If this is not the correct place to post this question please accept my apologies in advance.

I am looking to troubleshoot my A60 amp that I purchased off AliExpress. I have been listening to the amp for the past 4 months and think it is a phenomenal amplifier.

Previously when it worked correctly, I would turn the amp on and I would hear the audio signal turn on through the speakers, after a few seconds. That no longer happens and there is no sound. Previously when I looked into the chassis I would see a dim blue light that I no longer see.

Any help on where I can start to troubleshoot?

Thanks

Dan

 

[Paroxod4]

First, check the fuse on the back wall in the block where the network cable is connected. If you have no knowledge of radio engineering, look for a technician.

 

[Boydk]

You mean "Power cable" 😉

 

[Paroxod4]

Yes

 

[Hifi-Dan]

Thanks for the reply, yes I have already checked the fuse. The unit powers on.

 

[Paroxod4]

Good luck😉

 

[Hifi-Dan]

Hello-

If this is not the correct place to post this question please accept my apologies in advance.

I am looking to troubleshoot my A60 amp that I purchased off AliExpress. I have been listening to the amp for the past 4 months and think it is a phenomenal amplifier.

Previously when it worked correctly, I would turn the amp on and I would hear the audio signal turn on through the speakers, after a few seconds. That no longer happens and there is no sound. Previously when I looked into the chassis I would see a dim blue light that I no longer see.

Any help on where I can start to troubleshoot?

Thanks

Dan

I have ordered a ASS2 the delayed soft start board, and I am going to attempt to replace it.

 

[Paroxod4]

After turning on the amplifier, measure with a multimeter, does 230 V come from the soft-start board to the primary winding of the transformer? If not, change the soft-start. Is there an additional fuse on the board itself? Detailed photos would not hurt for inspection.

 

[Paroxod4]

It is possible that the small blue transformer of the soft start platform is faulty. You need to start with it.