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 Post subject: fabricating 7 pin test socket
PostPosted: Jun Sun 16, 2019 12:49 am 
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Joined: Mar Sun 20, 2016 11:04 pm
Posts: 212
Location: Mesa, AZ 85206
Hi all

One of my vintage 7 pin test sockets had one of the pins fall out...after I took it apart, I saw that the pins were actually soldered straight onto the test socket tabs with no mechanical interlock..

So, I decided what the heck, build some myself.

My question is what to use for the pins..I went down to the helpful hardware store, and they had piano wire of the right size. But piano wire is very difficult to bend, and creates some fit issues because of that.

I have tinned 18g which would work, but it might be too soft for pins.

1mm brass rods? They didn't have any locally, but I bet McMaster has 'em.

Thoughts?

Thanks!

Steve


Last edited by drworry on Jun Sun 16, 2019 3:49 am, edited 1 time in total.

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 Post subject: Re: fabricating 7 pin test socket
PostPosted: Jun Sun 16, 2019 1:40 am 
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Joined: May Thu 14, 2015 4:15 pm
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Location: Dallas, TX
If you are looking for small brass rod you might try a hobby shop. K&S makes a selection that can be found in hobby shops and I have also seen them in some hardware stores.

http://www.ksmetals.com/

Another idea is a welding supply store. Brazing rod comes in a number a number of sizes and it is very hard.

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It's not the Destination, It's the Journey.


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 Post subject: Re: fabricating 7 pin test socket
PostPosted: Jun Sun 16, 2019 4:26 am 
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Joined: Jan Tue 10, 2012 8:39 am
Posts: 210
Have you considered sacrificing an old tube? Those pins are probably some kind of steel and can't readily be soldered but that shouldn't stop you. Spot weld if you have to. Look over your stock of tubes and select one that has a bit extra pin length.

Bob


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 Post subject: Re: fabricating 7 pin test socket
PostPosted: Jun Sun 16, 2019 11:53 am 
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Joined: Nov Wed 30, 2016 7:35 pm
Posts: 4360
Location: Sunbury, Ohio 43074
I don't think you can solder to piano wire anyway. :)

Might want to try and find an old, and I do mean old, socket saver or extender ... they were built, shall we say, "a lot better" than what you will find today.

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 Post subject: Re: fabricating 7 pin test socket
PostPosted: Jun Sun 16, 2019 12:03 pm 
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Joined: Sep Tue 30, 2014 6:08 am
Posts: 4215
Location: Norfolk, VA
De-construct a socket saver?

https://www.ebay.com/itm/1-7Pin-Gold-Pl ... SwXk9bew-9

Use the base, a length o PVC tube/pipe, and a socket....

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 Post subject: Re: fabricating 7 pin test socket
PostPosted: Jun Mon 17, 2019 3:21 pm 
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Joined: Mar Sun 20, 2016 11:04 pm
Posts: 212
Location: Mesa, AZ 85206
All good ideas!

I have no idea why this has gotten into my head, but I am heading towards using a spare piece of 7/8" delrin, 1 1/2" tall, hollowing it out with a 5/8" drill bit (leaving 1/2" at the bottom), drill the pin holes in the bottom, cap it off with a spare 7 pin socket. Will have to cut reliefs in the socket and the top of the delrin to let the pin wires come out the side. Solder the tabs of the socket to the pins...

Just still thinking about what wire to use!

I wish 7 pin socket savers (the ones made by pomona or the like) with the screws were still available..I need 'em for one of my tube testers!

Steve


Last edited by drworry on Jun Tue 18, 2019 2:37 pm, edited 1 time in total.

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 Post subject: Re: fabricating 7 pin test socket
PostPosted: Jun Mon 17, 2019 3:38 pm 
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Joined: Nov Wed 30, 2016 7:35 pm
Posts: 4360
Location: Sunbury, Ohio 43074
They are available ... you just have to be at the right auction at the right time. Or "on the bay" I've seen them pop up by accident occasionally. Probably there all the time if you search.

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 Post subject: Re: fabricating 7 pin test socket
PostPosted: Jun Sun 23, 2019 10:26 pm 
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Location: Mesa, AZ 85206
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Well, this reminds me of the time I made my own bagels at home...I finished up and said "and I could have just gone up the street to the bagel store...."

But at least I learned something!

Steve


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