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 Post subject: How do you secure banana jacks????
PostPosted: Jul Thu 12, 2018 9:23 am 
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In my restoration of my Heathkit PS3, I've run into a problem with the banana jacks. I don't know if it's the same brand but basically just like the ones in the link below.

My problem is that the nut that holds them on, wants to strip the plastic threads, and it starts to twist around in it's panel hole. I painted on nail polish around the nut thinking that might hold it tight, but no luck. So any suggestions would help.

https://www.amazon.com/CESS-bd01-Amplifier-Terminal-Connector-Connectors/dp/B01G0PLING/ref=sr_1_7?ie=UTF8&qid=1531383682&sr=8-7&keywords=binding+post

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 Post subject: Re: How do you secure banana jacks????
PostPosted: Jul Thu 12, 2018 10:45 am 
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These work okay for me
Attachment:
banana_plug.jpg
banana_plug.jpg [ 8.32 KiB | Viewed 616 times ]

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 Post subject: Re: How do you secure banana jacks????
PostPosted: Jul Thu 12, 2018 2:33 pm 
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Agree that you need the kind with metal studs for the mounting hardware. You can JBWeld the plastic ones to the inside of the panel if you want, but it makes them harder to remove if you ever need to. That's been a good fix on older stuff though.

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 Post subject: Re: How do you secure banana jacks????
PostPosted: Jul Thu 12, 2018 4:48 pm 
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I'll second Mark and Dennis - I usually use the metal stud binding posts on homebrew projects. I do also on occasion use pure banana jacks. Inexpensive ones use a fairly soft plastic. I buy better quality (and more expensive) jacks from Mouser or Digi-Key that use a harder plastic. Lately I have been using Cinch banana jacks from Digi-Key. They cost less than a dollar apiece, come in the ten RMA (later RETMA, still later EIA) colors, and I have had no problems with threads stripping.

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 Post subject: Re: How do you secure banana jacks????
PostPosted: Jul Thu 12, 2018 5:21 pm 
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Dale H. Cook wrote:
Lately I have been using Cinch banana jacks from Digi-Key. They cost less than a dollar apiece, come in the ten RMA (later RETMA, still later EIA) colors, and I have had no problems with threads stripping.
I agree with Dale.

I use the same jacks.

You definitely need ones that have metal-to-metal contact.

- Leigh

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 Post subject: Re: How do you secure banana jacks????
PostPosted: Jul Thu 12, 2018 7:02 pm 
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Leigh wrote:
You definitely need ones that have metal-to-metal contact.

I have used a number of the Cinch jacks that are just plastic bodies, and they have worked well. Some of mine are on home-brewed equipment in the shop where they have held up for about twenty years. The metal bodied jacks are undoubtedly better for something that will get heavy use.

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 Post subject: Re: How do you secure banana jacks????
PostPosted: Jul Thu 12, 2018 9:29 pm 
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Dale H. Cook wrote:
Leigh wrote:
You definitely need ones that have metal-to-metal contact.
The metal bodied jacks are undoubtedly better for something that will get heavy use.
Hi Dale,

I was referring to the washers on the end of the plastic bushings, not the full metal jacks.

- Leigh

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 Post subject: Re: How do you secure banana jacks????
PostPosted: Jul Fri 13, 2018 2:49 am 
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I buy eitherTHESE, or, if I just need a connector, THIS STYLE

The first type make it a no brainer to get the proper 3/4" spacing.

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 Post subject: Re: How do you secure banana jacks????
PostPosted: Jul Fri 13, 2018 4:59 am 
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Mikeinkcmo wrote:
The first type make it a no brainer to get the proper 3/4" spacing.


Those would certainly solve the issue I'm having, but the holes are already in the panel, and I'm not sure what the spacing it. But I did go ahead and order some that are secured by only the stud as was recommended. I figure the stud going through the metal panel could be an issue, so I'll just slide a short piece of heat shrink to take care of that.

I've never quite had this issue before, and maybe I just got a cheap bunch the last time. But the new style will be what gets used from here on out.

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 Post subject: Re: How do you secure banana jacks????
PostPosted: Jul Fri 13, 2018 6:30 am 
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I've used the plastic bodied ones for years without problems. The trick is not to over-tighten them. They are made with flats and are intended to be mounted in holes that match their cross section. If you must mount them in existing round holes you can make adapter plates with the correct shape mounting holes and place them on the inside of the panel. Correct shaped holes are easily made by drilling to the flat-to-flat dimension and then filing to the final shape. This is a good use for aluminum scrap from other projects, but any easy to work metal or other material can be used.

By the way, these things are usually called "5-way binding posts", although I can never remember all five ways.

RRM


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 Post subject: Re: How do you secure banana jacks????
PostPosted: Jul Fri 13, 2018 8:25 am 
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Retired Radio Man wrote:
I've used the plastic bodied ones for years without problems. The trick is not to over-tighten them. They are made with flats and are intended to be mounted in holes that match their cross section. If you must mount them in existing round holes you can make adapter plates with the correct shape mounting holes and place them on the inside of the panel. Correct shaped holes are easily made by drilling to the flat-to-flat dimension and then filing to the final shape. This is a good use for aluminum scrap from other projects, but any easy to work metal or other material can be used.

By the way, these things are usually called "5-way binding posts", although I can never remember all five ways.

RRM


+1 The D-shaped ones work well if the hole is also D-shaped. Johnson Components makes the ones I use - in 7 different colors.

https://www.mouser.com/Test-Measurement ... xxZ1yy8usg

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 Post subject: Re: How do you secure banana jacks????
PostPosted: Jul Fri 13, 2018 5:12 pm 
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Leigh wrote:
I was referring to the washers on the end of the plastic bushings, not the full metal jacks.

Leigh - Good point. The inexpensive Mouser/Digi-Key jacks which I have used for home-brewed test equipment do not have those, but I have had no problems with them as shop equipment does not get rough treatment.

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 Post subject: Re: How do you secure banana jacks????
PostPosted: Jul Sat 14, 2018 8:59 am 
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The Heathkit 5 way binding posts work well if you have all the parts.

Two nuts. Two lockwashers or 1 lockwasher and lockwasher lug.
Attachment:
Binding post i.jpg
Binding post i.jpg [ 118.22 KiB | Viewed 288 times ]
Attachment:
Binding post  ii.jpg
Binding post ii.jpg [ 126.7 KiB | Viewed 288 times ]

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