Hot Follower 99

[peranders]

I have used diamond buffers (never seen before ) in some of my designs and I did some experimenting with higher currents. My conclusion was that it got quite unstable (the bias) with a big ratio between the driver transistor and the output transistor. 1:5 works good.

As a power unit I think this never seen design needs a bit more development.

 

[beppe61]

1) I have used diamond buffers (never seen before ) in some of my designs and I did some experimenting with higher currents.
My conclusion was that it got quite unstable (the bias) with a big ratio between the driver transistor and the output transistor. 1:5 works good.
As a power unit I think this never seen design needs a bit more development.

Dear Mr. Peranders,

1) speaking of the diamond topology I remember a headphone amp with no gain (i.e. a buffer) suitable for Grado headphones that had really impressive figures.
The idea of building a high current diamond buffer is very intriguing indeed.

That said what do you think of the power section of the attached schematic ?
It is so basic that even it seems just not possible it works!
Does it has any chance to sound good?

Thank you very much indeed.
Kind regards,

beppe

 

[anatech]

Hi P-A,
I have done a fair amount of work with power diamond buffers. Fantastic detail at low power levels. Large current excursions cause a lot of problems. No signal bias current is a problem at high driver to output ratios.

-Chris

 

[mtlin12]

I have used diamond buffers (never seen before ) in some of my designs and I did some experimenting with higher currents. My conclusion was that it got quite unstable (the bias) with a big ratio between the driver transistor and the output transistor. 1:5 works good.

As a power unit I think this never seen design needs a bit more development.

My Power Diamond Buffer is quite stable, and now a Taiwan Audio
company is preparing to mass product this Power Follower with
their own 10dB step-up IPT.


http://www.diyaudio.com/forums/showthread.php?s=&threadid=71557

This is their all-in-one PCB

 

[gaborbela]

Power Follower 99C

Hello

I'm in the process to give a try to the Power Follower 99C .Unfortunately I don't know how to contact to Andrea .
I do not have his E-mail address .
I have a question
On the schematic there is one 2k2 resistor and one 220R
On the layout there is two 2k2 resistor and no 220R .
I dont know which one is correct .Can someone help me lease with these problem .
Thank you very much

Greets gabor

 

[tiefbassuebertr]

Hello

I'm in the process to give a try to the Power Follower 99C .Unfortunately I don't know how to contact to Andrea .
I do not have his E-mail address .
I have a question
On the schematic there is one 2k2 resistor and one 220R
On the layout there is two 2k2 resistor and no 220R .
I dont know which one is correct .Can someone help me lease with these problem .
Thank you very much

Greets gabor

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