Which connector is the best for tiny coax cable for audio signal?

Thread Starter

Alon Perelmuter

Joined Apr 23, 2016
6
Hi,

I would like to get your help finding the way to design the connectors for a project I'm working on.

I've got a a few pieces of wood with 3 piezo sensors attached - each piezo sensors has coax cable.
This piece of wood (the coax cables) need to be connected to my audio card (Teensy Audio board) https://www.pjrc.com/store/teensy3_audio.html to the "LINE IN" pins.

My mission is to build a small PCB, or actually just a socket that will fit such that I could connect each time different piece of wood with his piezo sensors.
What type of male\female connectors will be the best to avoid noises and also easy for use?

Thanks a lot
 

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ian field

Joined Oct 27, 2012
6,539
Hi,

I would like to get your help finding the way to design the connectors for a project I'm working on.

I've got a a few pieces of wood with 3 piezo sensors attached - each piezo sensors has coax cable.
This piece of wood (the coax cables) need to be connected to my audio card (Teensy Audio board) https://www.pjrc.com/store/teensy3_audio.html to the "LINE IN" pins.

My mission is to build a small PCB, or actually just a socket that will fit such that I could connect each time different piece of wood with his piezo sensors.
What type of male\female connectors will be the best to avoid noises and also easy for use?

Thanks a lot
Its not something that comes up much - most people just solder the tails to PCB pins.

There are various connectors on the market, from the type that connect the 3 VGA coax cables to the CRT PCB to the various types used for net hub Wi-Fi antennas.

If you don't venture into RF; things like impedance and transmission line characteristics probably aren't very important.

Suitability is mostly about what you can crimp onto the leads without getting into a struggle. Audio screened lead isn't braided like RF coax - that can make life difficult.
 
I'm not sure what the right answer is, but an isolated BNC may be easy to use. https://www.showmecables.com/bnc-female-chassis-mount-connector-isolated

Adapters between phono are available. If you want a lighter cable RG174 can be used. You can even adapt TV coax to BNC.
There is a 50 and 75 ohm BNC's, but that doesn;t matter in your case.

You choice may depend on mating cycles and the flexibility of the cable.

Here's htt p://www.cablesondemand.com/category/RG174/URvars/Catalog/Library/InfoManage/RG174_50_OHM_COAX_CABLE.htm some RG174 patch cables with BNC connectors.

Series adapters to audio shouldn't be that difficult. Here https://www.amazon.com/RiteAV-BNC-F...rd_wg=g51z8&psc=1&refRID=7D4KN2ZW6523W0EW7CGA is BNC to RCA
 

ian field

Joined Oct 27, 2012
6,539
The best audio connector is one that mates with whatever it is to which you want to connect the cable.
If all the leads come from one device - you can get hybrid D-connectors with coaxial connectors in place of some of the regular pins - Sun Microsystems sometimes used them on their CRT displays.

There is probably a compact 3 coax version with no regular pins.
 
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