Looking for flexible coax for SPDIF. Preferably RCA terminated. Everything I've ever come across is thick and hard (haha).
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Look for something made of RG174... It's 50 ohm, not 75, but it's flexible. I use it for wiring inside of the preamp etc.
Here's one: https://www.amazon.com/Pigtail-Jumper-coaxial-Quality-Shipping/dp/B01AQXRF30
Here's one: https://www.amazon.com/Pigtail-Jumper-coaxial-Quality-Shipping/dp/B01AQXRF30
According to specifications 50 ohm is not suitable.
S/PDIF, RCA connector, uses coaxial cable impedance 75 ohm.
S/PDIF, RCA connector, uses coaxial cable impedance 75 ohm.
I can't attest to the quality or even whether it uses 75 ohm cable, but this might fit the bill: https://www.bestbuy.com/site/insignia-6-digital-coaxial-audio-cable-black/6412632.p?skuId=6412632
In general you should be able to use any composite video cable as they are supposed to be 75 ohms and are terminated with RCA connectors.
In general you should be able to use any composite video cable as they are supposed to be 75 ohms and are terminated with RCA connectors.
RG179 should be 75 ohms and at least some cables are flexible inner core. I have used short lengths as SPDIF-cables in the past without issues, but no comments on suitability otherwise.
It also depends on the run length. A 50 ohm cable will work fine for S/PDIF if the run is short enough.
I've run S/PDIF through standard audio cable before, too. Cheap dollar store 6 foot RCA. Worked fine since it was only 6 feet. Same thing with 10/2 networking. Short runs of RG59 worked in place of RG58.
Here are the crimps 1 Gold Plated RCA Male Crimp for RG174 RG179 RG316 RG188 Coax Cable RF Connector | eBay
I've run S/PDIF through standard audio cable before, too. Cheap dollar store 6 foot RCA. Worked fine since it was only 6 feet. Same thing with 10/2 networking. Short runs of RG59 worked in place of RG58.
Here are the crimps 1 Gold Plated RCA Male Crimp for RG174 RG179 RG316 RG188 Coax Cable RF Connector | eBay
Understanding Coaxial Cables - The Complete Guide
Interesting read on the types and qualities of different coax.
Interesting read on the types and qualities of different coax.
I just bought a length of Kimber Illuminations V21 for SPDIF purposes . I think that they’re RG59 based. They’re quite flexible.
I agree that for a few feet the impedance of the coax shouldn't matter too much especially at low frequencies.
192kHz times however many channels? Most people are still using 44.1kHz anyway. S/PDIF is low bandwidth compared to digital video like HDMI... Still, for longer runs the impedance should be correct.
Looks like Belden has at least 2 flexible, 75ohm coaxial cables: 1694F and 1505F.
I've used 1505a and 1694a, which I believe are the non-flex versions.
75 Ohm Coax Cable
I've used 1505a and 1694a, which I believe are the non-flex versions.
75 Ohm Coax Cable
SPDIF IS digital audio BUT the signal on the cable is an ANALOG representation of the digital signal. As such it is
subject to all the things can happen on an analog cable. Reflections from improper impedance, attenuation,
HF rolloff and more. As long as the degradation stays under the threshold it will work fine.
Bottom line, ALL digital transfers are ANALOG. Look at the eye pattern from a CD.
G²
RCA or Phono connectors are not 75 Ohm! BNC is.
All quality RF cable is solid centre conductor for obvious reasons; RF flows on the outer layer of the conductor which is why better quality RF cable is silver plated steel. Multi strand or flexible cores set up wave guide patterns and obstruct the RF signal by setting up little reflections that beat against the original waveform.
Silver for excellent conductance of RF signals and Steel for strength.
Use standard miniature flexible coaxial cable or Instrument Cable as it is called.
Pro Grade Classic XKE Instrument Cable | Van-Damme