There are RCA's available that are attached (ganged) so YES sometimes the spacing needs to be standard. Not that those types of RCA's are commonly used.
I've only ever seen the female RCA ganged.
RCA23B pdf, RCA23B description, RCA23B datasheets, RCA23B view ::: ALLDATASHEET :::
RCA23B pdf, RCA23B description, RCA23B datasheets, RCA23B view ::: ALLDATASHEET :::
oh, I just bet you have 😀
already established that the standard for 5-way binding posts on test gear and many - but not all - amps is 3/4", but with some of the monstrously oversized bananas, spades and RCAs ( WBT anyone?) , that's not always enough clearance -
and when there's a row of speaker outputs on a surround receiver, they can be a real PITA to secure if not using 4mm bananas or equiv
If you are looking for something to plug into commercial gear, I agree it's the wild, wild west out there, and there's no accepted standard. Not only that, there is a bunch of different output connector types, from barrier strips to screw terminals to 5-way binding posts to spring-loaded clips that accept stripped wire (even phone jacks!). If that's what you were asking all along, that's the correct answer. RCAs, ditto. There is probably a standard spacing for RCA jacks on a common mounting block for PC insertion, but it doesn't really matter all that much, as there's no such thing as ganged RCA plugs to go with them.
Having said that, if you're building your own gear, it's convenient to use the standard dual 5-way binding posts for output connectors. That's where the 0.375" holes on 0.75" spacing would apply.
Sometimes it makes sense (especially if you are building tube gear that has multiple output taps) to use a nice, rugged barrier strip for output connections so that all the taps are available. In that case, there are connectors that have ganged fork terminals mounted on phenolic board with appropriate spacing that could be used to interface the speaker wire to the terminal strip. Of course, you can just crimp appropriate fork or ring lugs to your speaker cables for a simpler solution.
Having said that, if you're building your own gear, it's convenient to use the standard dual 5-way binding posts for output connectors. That's where the 0.375" holes on 0.75" spacing would apply.
Sometimes it makes sense (especially if you are building tube gear that has multiple output taps) to use a nice, rugged barrier strip for output connections so that all the taps are available. In that case, there are connectors that have ganged fork terminals mounted on phenolic board with appropriate spacing that could be used to interface the speaker wire to the terminal strip. Of course, you can just crimp appropriate fork or ring lugs to your speaker cables for a simpler solution.
Hirschmann and General Radio (GenRad) both claim to have invented the banana plug in 1924. There is a dual version 274-M in the 1928 GR catalog. It became the defacto standard for instrumentation and was adopted by the audio industry. The spacing is 0.75 inch (19.05 mm).
The standard RCA spacing appears to be 14mm.
I'm posting this here because I went searching for the answer, found this thread, and didn't find the answer!
So I went looking at datasheets.
This measurement is from 6 different products, from 4 different manufacturers.
0.551inches, or 14mm.
I'm posting this here because I went searching for the answer, found this thread, and didn't find the answer!
So I went looking at datasheets.
This measurement is from 6 different products, from 4 different manufacturers.
0.551inches, or 14mm.
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