Gainclone

[Angel Puerto]

Hello,

I had a box and six transformers without knowing that to make. Because well I made this amplifier of six channels.

A greeting.


Angel

 

[Angel Puerto]

Hello,

I had a box and six transformers without knowing that to make.
Well I made this amplifier of six channels.

A greeting.


Angel

 

[Angel Puerto]

Hello,

I have used the LM3875

Greetings


Angel

 

[Dr. Photon]

that looks very good. How will you be using it? Will you use it for Home theater surround sound (5 channels plus a subwoofer), or for a triamped stereo system? Or did you simply have extra parts and build channels that you might use later on?

I like the heatsink-box.

 

[Angel Puerto]

Hello,

My intention was the triamplification

A greeting


Angel.

 

[Angel Puerto]

Hello,

My intention was the triamplification

http://www.behringer.com/DCX2496/index.cfm?lang=ENG


A greeting


Angel.

 

[Russ White]

Good work Angel!

How does it sound? What did you triamplify?

 

[Angel Puerto]

Hello Ruus White,

After listening this gainclone, given not me the results that I waited. My references are these two amplifiers made by my:

Alehp 3
Ongaku 211

I will carry out but you prove putting a passive preamplificador, I will already comment you.

 

[Angel Puerto]

I like this 211 a lot of Russ

 

[Angel Puerto]

I should also study the PSU, but in principle I carry out this assembly according to the general approaches.

 

[analog_sa]

Nothing wrong with the Gainclone - your references are to blame. If you had a nice Akai amp as a reference you would absolutely love the GC.

 

[Angel Puerto]

I believe that you have reason.
Because they are some very good amplifiers and I didn't have experience with the Gainclone.

A greeting.

 

[Angel Puerto]

Analog_sa

I have proven the Gainclone with a passive preamplifier and their result I improve notably.

Greetings.

 

[analog_sa]

Interesting. I also use a GC with a transformer volume. The real GC fans seem to prefer active preamps - there seems to be a huge variation in listening tastes and expectations.

 

[Angel Puerto]

It is not always possible the application of passive preamplifiers, but me whenever I can I eliminate the active preamplifiers. They always add or they remove.

Angel

 

[owen]

Hi angel,
I'm a firm believer in a good buffer for the gainclone, and use an old fashioned chip too, the LF353, for the exact same reason we chose the 3875 - it has an almost identical topology, and almost identical response, just significantly lower dissipation.

Tried the burr brown efforts - nice but very HiFi, and Nuuks buffer is a treat.

As to the why this should work better than a TVC - I cannot give a solid explanation (I am not an EE by trade), but I feel that there are some input resistance variations (that are offest by capacitance to give a net input impedance), that take good old current to solve, and more than a TVC/Passive can muster.

However, the buffer needs only to have unity gain, and you'll add around 9 parts or so to the signal path (one way or another) - still a very low parts count, and it'll cost little to try.

Have fun

Owen

 

[Angel Puerto]

Hello Owen

I have proven the Gainclone with this preamplifier and I have been very surprised. I cannot believe myself as this working with this preamplifier.

Impressive.

Angel

 

[Angel Puerto]

Very satisfied




Ángel

 

[Angel Puerto]

Excuse,

This new preamplificador that I have proven is of http://www.borbelyaudio.com/eb1198116.asp very different to those previous of valve and passive.

Angel.