Commercial complete Gainclone kit for a beginner?

[AndrewT]

5pin XLR?

[A Sanchez]

Thanks a lot for your replies. Now that I know the terminology will be much easier to find what I have in mind.

Yes I'm planning to do an unregulated snubberized PSU (ala Carlosfm) but with one rectifier bridge and one transformer per channel without common ground like this
http://myweb.tiscali.co.uk/nuukspot/...cpsu.2t.2r.gif

I will take care to include the separate switching and the ground leads, including an earth safety ground as suggested.

Regards

Antonio

[danielwritesbac]

Originally posted by A Sanchez
Thanks a lot for your replies. Now that I know the terminology will be much easier to find what I have in mind.

Yes I'm planning to do an unregulated snubberized PSU (ala Carlosfm) but with one rectifier bridge and one transformer per channel without common ground like this
http://myweb.tiscali.co.uk/nuukspot/...cpsu.2t.2r.gif

I will take care to include the separate switching and the ground leads, including an earth safety ground as suggested.

Regards

Antonio

Like this? (click photo)

P.S. The power ground is the voltage reference point for your speaker. Take care to make it strong so that you have good bass.

[danielwritesbac]

Originally posted by A Sanchez
Thanks a lot for your replies. Now that I know the terminology will be much easier to find what I have in mind.

Yes I'm planning to do an unregulated snubberized PSU (ala Carlosfm) but with one rectifier bridge and one transformer per channel without common ground like this
http://myweb.tiscali.co.uk/nuukspot/...cpsu.2t.2r.gif

I will take care to include the separate switching and the ground leads, including an earth safety ground as suggested.

Regards

Antonio

Or maybe like this? (click photo)

P.S. The metal shell of a commercial 1-piece bridge rectifier, is designed to be grounded, therefore it can go inside the same chassis as commercial broadcast equipment, thereby eliminating the noises caused by excess cable lengths. The noises are from rectifiers, not transformers. Here's some more ways to quiet the rectifier. . .
See also: http://www.diyaudio.com/forums/showt...00#post1500500
See photo #4 here: http://diyaudioprojects.com/Chip/Syn...lone/index.htm
And, have a look at other amplifier builds to see that the heatsink is often used as a shield/divider between power and amplifier.

[danielwritesbac]

Opinion:

I'm not in favor of seperate, external, boxes for power supplies. That extends the length of the cable, and personally, I'm against paying more to make extra noise. . . unless its a very decorative noise indeed.

[A Sanchez]

Daniel,

I want to have the PSUs in a separate box for practical and WAF reasons.

The WAF reasons is that there is no room so pile up more boxes where I have the hifi system and so I need to have it discretely placed on the floor on one side.

The practical reason is that I want to start trying different chipamp configurations/chips and it is handy to not have to deal with transformers and bridges and electrical cables every time I want to make trials of new amps. Having a separate box with XLR connectors will allow me to plug and play/test new designs quick and easily.

I hope I do not put too much noise doing this and I have seen many pros also do it.

Antonio

[danielwritesbac]

Originally posted by A Sanchez
Daniel,
The practical reason is that I want to start trying different chipamp configurations/chips and it is handy to not have to deal with transformers and bridges and electrical cables every time I want to make trials of new amps. Having a separate box with XLR connectors will allow me to plug and play/test new designs quick and easily.

I hope I do not put too much noise doing this and I have seen many pros also do it.

Antonio

Oh sure! Its a very minor audio difference, and nothing to worry about. A difference is a tool, and the thing that matters most is your appreciation of its effect.

I'm so glad that you're doing this for practical reasons. But, I wanted to make it clear, that a single enclosure can perform quite well, and that seperate boxes aren't an audio enhancement.
Seperate boxes are, in fact. . . only boxes.

Its about time to start that power supply thread, isn't it?

[A Sanchez]

Originally posted by danielwritesbac

Its about time to start that power supply thread, isn't it?

Oh yes, I do agree with this, which is much needed for beginners.

Antonio

[danielwritesbac]

Okay. That will be just as soon as I make something really nice to plug into that power supply.

Its been slowly forming here: http://www.diyaudio.com/forums/showt...85#post1514985

That's LM1875, now up to a 30w per channel, and it doesn't have the Spike system--so the typical chipamp clipping isn't present.

I've been going slowly so that it looks pretty and do-able.
The input circuit gets put on today. Wish me luck at keeping it good looking.

[ionomolo]

Originally posted by danielwritesbac
That's LM1875, now up to a 30w per channel, and it doesn't have the Spike system--so the typical chipamp clipping isn't present.

If any of your chipamps shows "spike" clipping then it means that it isn't properly heatsinked! This is not only bad for sound but it will also reduce its life expectancy.