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Old 15th October 2004, 09:43 AM   #1
Electrons are yellow and more is better!
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Default Sjöström Diamond Buffer group buy

At the moment there are a couple of Diamond buffer pcb's, my QRV-05 , Glassman's, AMZ-FX's and even more (somebody may fresh up my memory). All these implementations are different. 100% SMD, 90% SMD, 0% SMD, with cascodes and without.

First: I have absolutely no need for a diamond buffer

Second: This small deisgn is fun and easy to make good

Third: This is a small project, I like that.

Fourth: I feel like doing a good nice looking hole mounted pcb.

The design will be exactly as my QRV_05 but with both positive and negative current sources at the input, according to Bruno's input in this matter.


Design goal:

* High performance, best as possible, therefor usage of cascodes.

* Use as few different parts as possible

* All resistors 400 mils between pins (or do you prefer an even smaller pcb with standing resistors?)

* Three pairs of output transistors, consisting of TO92 types

* Pcb will be in a 4 pcs. panel.

How big may the pcb be? What is the limit?

What do you say?
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Old 19th October 2004, 04:03 PM   #2
roibm is offline roibm  Romania
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Well, I got to ask this...
What are they good for and what is their advantage over other solutions? I read about headphone amps, can you descibe how they compare to other amps?

thanks
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Old 19th October 2004, 04:22 PM   #3
Electrons are yellow and more is better!
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First of all: It's not an amplifier, OK an amplifier with the gain of nearly 1, 0.95-0.999. The main usage is to have it between an opamp or some other kind of amplifier with a weak output stage and a rather heavy load. The buffer can be used within or outside a feedback loop. The buffer has also current sources at the input for creating class A mode of the opamp.
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Old 22nd October 2004, 06:52 AM   #4
digi01 is offline digi01  China
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P-A,count me in.
If you work on proel,I am glad to work in teams with you.
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Old 14th September 2013, 08:24 AM   #5
Electrons are yellow and more is better!
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This was on old thread but is there any interest for a group buy today? Back then the pcb was double sided, now the pcb has four layers and the size is nearly half the size.
Click the image to open in full size.
Click the image to open in full size.
Documentation
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Last edited by peranders; 14th September 2013 at 08:41 AM.
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Old 14th September 2013, 01:19 PM   #6
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Per-Anders, please count me in for 2 PCBs.
Best regards - Rudi_Ratlos
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Old 14th September 2013, 09:17 PM   #7
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Hi Per-Anders

i'm in for 4 boards, markus
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Old 14th September 2013, 09:50 PM   #8
tinitus is offline tinitus  Europe
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how about board and component kit ?

prices ?
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Old 14th September 2013, 10:00 PM   #9
jackh is offline jackh  United States
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I'll take 2 boards
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Old 15th September 2013, 06:06 AM   #10
Electrons are yellow and more is better!
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tinitus, component kit is out of the question because it consumes a lot time and the parts are cheap and available for everyone.
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