I have Just bought a Cambridge audio dac magic 1, it has only BNC coaxial inputs and no optical input.
I would like to connect my multiplayer to this but its digital optical out.
I was thinking that surely there is a digital signal going into the convertor or whatever it is thats outputting the optical signal.
Have any of you already tapped into the digital signal on a cd or similar and then tapped it off to provide a digital coaxial output?
The alternative is trying to add optical input to the dacmagic.
Thanks in advance
I would like to connect my multiplayer to this but its digital optical out.
I was thinking that surely there is a digital signal going into the convertor or whatever it is thats outputting the optical signal.
Have any of you already tapped into the digital signal on a cd or similar and then tapped it off to provide a digital coaxial output?
The alternative is trying to add optical input to the dacmagic.
Thanks in advance
Attachments
https://www.epanorama.net/documents/audio/spdif.html
It's not hard, pay attention to the information about signal level.
It's not hard, pay attention to the information about signal level.
How about a simple optical to coaxial converter? You can DIY this or buy one for very little money nowadays. This way you can keep both the Sony and Cambridge original.
found this at cpc which is 10mins from me think its the same ic??? https://cpc.farnell.com/nxp/74hc14d/ic-logic-74hc14-soic14-hex-inverter/dp/SC13758
Simplest TTL to S/PDIF coax interface
100nF
TTL ----||-----330ohm--+--------- coax S/PDIF signal out
in | 100ohm | Ground -----------------+--------- coax signal ground
Bad formatting but I would just try this 1st. It's on that web page.
100nF
TTL ----||-----330ohm--+--------- coax S/PDIF signal out
in | 100ohm | Ground -----------------+--------- coax signal ground
Bad formatting but I would just try this 1st. It's on that web page.
I must be a bit thick but i couldnt make head nor tail of this compared with a normal schematic, is this just saying TTL is the digital output from pin 60 via a cap? in series with a 330ohm directly out to your newly installed coax out socket?
In the player all I see a 330 ohm between pin 60 and the TTL input of the Toslink transmitter. I would just put that little blog circuit in between a coax connector and the Toslink transmitter and see if it works.
BTW, I just noticed Cambridge doesn't use RCA inputs er BNCs. Unifortunately these are 50 Ohm types
A long time ago I DIY'ed a Toslink to coax converter using just a handful of components, and its schematic can be found in this thread.
If for some reason you don't like the idea of going optical first, you could cut the digital signal in the CDP going to the optical transmitter and probably feed it directly to the 74HCT04.
I'm not sure. SPDIF needs both 75 ohms as output impedance and 75 ohms input impedance to work like it is designed to do.
A long time ago I DIY'ed a Toslink to coax converter using just a handful of components, and its schematic can be found in this thread.
If for some reason you don't like the idea of going optical first, you could cut the digital signal in the CDP going to the optical transmitter and probably feed it directly to the 74HCT04.