AudioSector-chip amp kits, dacs, chassis

[jleaman]

Originally posted by BrianGT
Here is a picture with the Sounds Connections (Vampire Wire) rca connector, which has the same footprint as the BNC.

--
Brian

That hi res pic with macro looks SUPER!!!!

[BrianGT]

Originally posted by jleaman
That hi res pic with macro looks SUPER!!!!

What are you talking about? The pictures were taken with my 4 year old 2.6 megapixel camera without any macro mode:
http://www.dpreview.com/reviews/canonpro90/

--
Brian

[Peter Daniel]

Here's the DAC built with a green board. It is probably one of the first built by someone else than me The only difference to premium version is use of Panasonic FC caps intead of BG NX (4 x 1000u in PS)

[jleaman]

Peter- You Got Mail..

[Peter Daniel]

Before the DAC section on a website is up and running, here's the info regarding the circuit, options and prices.

Two boards are available: the all-in-one solution with integrated PS and all connectors PCB mounted; you will only need a piece of wood to put it on and it can work this way. It actually sounds better without a chassis and this is how I use it: http://www.diyaudio.com/forums/showt...611#post599611

This board is $35.

The second board, does not accomodate transformer, and it has to be mounted separately. This is designed with exact the same parts in mind as the first one, additionally it can also accomodate 2 regulator circuits, acting as battery chargers, (if someone wants to use battery power). This board allows direct mount of both RCA and BNC input and RCA output (dual Vampire type) http://www.diyaudio.com/forums/showt...709#post604709

Let's call it a green board and it is available at $30.

Attached is circuit schematic, which with addition to one OsCon before U1 regulator in a first board, is the same for both.

[DJNUBZ]

can you get the all in one with a rca instead of a bnc input?

[jleaman]

Originally posted by DJNUBZ
can you get the all in one with a rca instead of a bnc input?

I belive so. : O )

[Russ White]

How difficult might it be to adapt the PCB to handle optical input?

[Peter Daniel]

Schematic shows the type and parts values. This is quite critical for the DAC sound signature, and this is how I liked it. The actual combination makes the TDA1543 to sound very natural, open, harshless and neutral, with well defind soudstage, articulate midrange, and very tight bass; the big strengths are musicality and involvement. At present, I don't see any reasonable way to improve it. I'm using BG N caps for coupling and believe me, they are better here than MIT RTX, Siemens MKV, Russian paper in oil or Jensens (copper foil). I'm quite sure that the new V-caps are better, but this is not a reasonable way to improve that DAC

The premium DAC kit will contain the boards and the following parts:

MSR 860 8pcs
Line Filter 2pcs
Dale 20R resistors 4pcs
1000/25 BG NX 4pcs
Ferrite Bead 3pcs
AN8005 3pcs
AN8008 1pc
10/50 BG N 2pcs
47/50 BG N 1pc
15/20 OsCon 1 or 2pcs
4.7/50 BG N 2pcs
3n3 PPS film cap 1pc
330R Caddock 1pc
0.47/50 BG NX 1pc
75R Caddock 1pc
10n Vishay 2pcs
SN75179 1pc
CS8412 SMD 1pc
TDA1543 1pc
2k7 Riken 2pcs
1k5 Riken 1pc
BNC jack 1pc


The cost of All-in-One DAC kit is $210

The cost of Green DAC kit is $200

None of the kits contain RCA jacks, transformer, fuses or power modules. Those can be obtained separately and the prices are as follows:

PCB mounted Hammond 229D16 transformer (including power entry module and fuse): $30

Cardas double RCA Female, PCB mount: $20

[Peter Daniel]

Originally posted by Russ White
How difficult might it be to adapt the PCB to handle optical input?

For additional $10, I can modify PCB to accept optical input (including parts), but this will be the only input available on board. If you want two inputs (optical and BNC) it can be also done, but outboard. It's pretty simple actually.