Dac 3

Designed by John Westlake, former Pink Triangle Tech.
Dac 3 was last and the best of the Dacmagic series.
Gold plated circuit board. Has 3 seperate transformers and 19 independant power feeds to the PCB.
It has two RCA digital inputs, one optical TOSlink input, one RCA digital output, analogue outputs and balanced outputs. It can decode at 48 kHz also.





After market upgrades include double-screened, heavy-duty power cable, extensive damping panels applied to case and chassis plus isolation to feet. Perfect and in as new condition in every way.

A digital interconnect and three BNC adaptors are also available.

Details, links and payment options at
http://boxer.ebid.co.uk/perl/objects/auction.cgi/1098654538-6513-0

 

bump

 

I'm impressed by the connections this has. Sensible BNC inputs and balanced outputs is pretty unusual at it's price point.

 

I know............ and I am missing those connections.

The one I am using now got just one set of RCA inputs.
I need more. It also has an AES/EBU balanced input.
Any easy way I can convert that to 75 Ohm unbalanced?

 

Hmmm... I suspect you can do it simply enough with a cable that has a phono at one end (what I assume your transport output it), and an XLR at the other end, but I'm not sure I'm afraid. I'd post this as a seperate question for someone to answer. My guesswould be you'd connect the signal and return to the right pins of the XLR, and then just leave the earth floating...

 

I have seen pin connections somewhere for the AES/EBU and I can get the bits to wire it up to RCA.

I just wondered because of the 110 Ohm and 75 Ohm mismatch. If it is not serious I can use it for FreeView or DVD and use the only right one I have now for CDP.

Thought of making up a 'Y' adaptor but I have to make sure that only one digital source is live. Someone could easily make a mistake.

Hopefully Tony, Isaac or someone will see this message.

 

Damn good point! Oops, I didn't think about that . I think for analogue connections you can mix connectors like I said, but you're of course completley right it's somewhat different for digital.

 

No, AES/EBU and SPDIF have very different signal levels. The M-audio CO3 takes in AES/EBU, coax and optical connections, and gives out all three for any one input. ie, it's a format converter to all three types. The CO2 does the same but without AES/EBU, but it's a third of the price.

 

Thanks Isaac
People have several digital sources these days.
May be you could consider this need in your new design

 

Already have done...

 

Unlike DAC 3 shown in the picture here, my M-Audio Super DAC 2496 has only one pair of RCA inputs.
I have considered using a 'Y' adapter to connect two digital sources to this input.
What will happen, if by accident, both digital sources happened to be switched on?
Will it cause any damage to anything?

Thanks.

 

Hmmm... I'd like to know the answer to this!

It's partly going to depend what happens to the output impedence of the unused source when it's switched off I think. If it stays 75Ohm, as I suspect it will, then it's presumably a bad idea since the source that's on will see two 75Ohm loads in parallel (doubling the current demand if nothing else).

 

Sold the DAC 3 to a person that hold a senior position with a big name cable manufacturer

He has promised to send me loads of samples for DIY and testing.

That should keep me busy if this winter turns out bad.

 

Found the answer at another forum.

"It may work if only one device is turned on, but you are loading the transmission line abnormally and performance will likely be poor."