Electronics > Beginners
How to attach an RCA connector to a chassis ?
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Hextejas:
I am building a pre-amp and it has 4 RCA connectors on the back. I have done some reading and it has not been helpful.
Anyway here is a disassembled picture of mine in 5 pieces.
I think that all 4 of the loose pieces go inside the chassis but there are a few things that dont seem to make sense to me.
1 of the black washers has a lip on it as if it is meant to isolate the something from the chassis and I dont know what.
What is the 3rd from left, the metal ring with a tab used for ? It looks like it is meant to be used to be able to run a wire to ground or somewhere. But isnt the whole dang assembly, with the exception of the internal signal, grounded by being in contact with the chassis ?
Have you any picture that would show how this booger is attached ?

Thanks.
Gyro:

--- Quote ---I think that all 4 of the loose pieces go inside the chassis but there are a few things that dont seem to make sense to me.
--- End quote ---

Three of them go inside, one of the plastic washers (the one with the lip) goes outside. The lip is to center the connector so that the outer doesn't short to the chassis. The inner washer insulates the solder tag from the inside of the chassis (The solder tag goes next to the nut).

If you don't need to isolate the RCA connector from the chassis, then you can just ditch the plastic washers.
edpalmer42:
The connector has the option of isolating the ground from the chassis or not.

If you want to isolate the ground, slide the black washer with the lip over the back end of the connector with the lip pointing toward the solder end.  Now push the connector through the hole in the chassis from the outside.  The mounting hole has to be big enough so that the lip fits through the hole.  Now add the second black washer on the inside of the chassis.  The metal ring goes next, and finally, the nut.  Make your connections to the solder connection on the end and on the tab.

If you don't want to isolate the ground, don't use the black washers or the ring, just the connector and the nut.

The question of whether to isolate the ground or not depends on your application.

Ed
bson:
Drill a hole to fit the outside of the bushing lip.  Insert bushing lip side in from the front.  Insert the connector from the front.  Add the rear bushing or plastic washer.  Add  the the ground tab, thread on the nut; orient the ground tab to a suitable position and hand tighten the nut with a matching socket.  No gorilla stuff needed.  Bend the ground tab out a little so it comes off the panel.  Solder hookup wire onto center and ground tab.
Brumby:
This:

--- Quote from: Gyro on September 30, 2018, 08:35:45 pm ---Three of them go inside, one of the plastic washers (the one with the lip) goes outside. The lip is to center the connector so that the outer doesn't short to the chassis. The inner washer insulates the solder tag from the inside of the chassis (The solder tag goes next to the nut).

--- End quote ---

This is just a quick sketch showing the panel and the two washers.  The important things to remember are the size of the hole - and that you need to make sure you deburr and clean off any metal bits from around the hole or you could short to the chassis.

Note: These washers are only necessary when you want the body of the RCA connector isolated from the chassis.  You won't need either of them if you want the body of the connector secured directly to the chassis.  Which way you go will depend on the requirements.

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