[Amateur-repairs] Test jigs for potentiometers, TO-220 devices?

 

Hi all

Has anybody ever built test jigs for either potentiometers or TO-220 semiconductor devices?

I have a bunch of old pots that need testing, as well as dozens (maybe hundreds) of LM-317 and 780x style voltage regulators. 

My biggest need is a way to swiftly connect devices in the jig.  Any hints?  My industrial electronics expertise is rather limited in the area of fixturing.  All devices are RFE and may have crapped-out leads, so a plain socket is out of the question.  It'll have to use clamps.

As far as the electronic "guts" of the testers, I can probably figure them out but I'm willing to discuss and I welcome suggestions. 

Thanks and 73

Jim N6OTQ

PS -- This is the sort of project that Wayne Green would have published in 73.

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[Simply Computers] Re: This is a test

 

hello

just wanted to tell you the test worked and I don't know the email route

have a good day

Joseph

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[Simply Computers] Vive la differrence? re 'This is a test'

 

Well, at least I didn't flunk the test; the message probably appeared on the board before I could return to it. 

Now, what I'm wondering is: does the browser  one is using make a difference? For reasons I can't even remember right now, I've downloaded IE 10, and I think I did so sometime yesterday !! ;-).

FB

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[Simply Computers] This is a test

 

Since I have been unable to post either a new topic or a reply directly on the group's web page, I'm trying the 'email route' as some may already know ;-)

FB.

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[Electronics_101] RE: Help Needed: Audio oscillator test

 

 Hello

Thanks everyone...several good suggestions there...I think I can make a sound decision on feedback now. I like the idea of the software to make an oscilloscope on the computer screen...I didn't even know there was a way to do that!

Again, thanks to each of you.

Patrick

---In electronics_101@yahoogroups.com, <jongkung01@...> wrote:

Patrick

The best way is to hook it up to an oscilloscope and look at the wave form to make sure it is clean. But if you don't have one, you can fake one. 

Do a google search (or bing search, yahoo search, etc) and look for SOUNDCARD oscilloscope and download this :  

http://www.zeitnitz.de/Christian/scope_en

There are hundred others. That's just the first one I've found. They are usually limited to audio freq (maybe up to 44khz) but also by the quality of you sound chip - usually good enough this kind of work. 

Also read the instruction carefully so you don't over power you mic input and blow it up. 

Jong 

On Sep 30, 2013, at 11:37 AM, <vw_beetle_fix_it@...> wrote:

Hello

Hi everybody.

I just bought an audio oscillator and I could some help in figuring out what kind of shape it's in (so I can leave feedback). It was quite a bit less expensive than some of the others on the page.

It's a Hewlett Packard Model 204 D. "D" as in "Dinosaur".

Does anyone know of a way to put it through its paces??? I only have a VOM and a grid dip meter here so ANY help would be appreciated. 

Best Regards

Patrick

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Re: [Electronics_101] Help Needed: Audio oscillator test

 

Patrick

The best way is to hook it up to an oscilloscope and look at the wave form to make sure it is clean. But if you don't have one, you can fake one. 

Do a google search (or bing search, yahoo search, etc) and look for SOUNDCARD oscilloscope and download this :  

http://www.zeitnitz.de/Christian/scope_en

There are hundred others. That's just the first one I've found. They are usually limited to audio freq (maybe up to 44khz) but also by the quality of you sound chip - usually good enough this kind of work. 

Also read the instruction carefully so you don't over power you mic input and blow it up. 

Jong 

On Sep 30, 2013, at 11:37 AM, <vw_beetle_fix_it@yahoo.com> wrote:

Hello

Hi everybody.

I just bought an audio oscillator and I could some help in figuring out what kind of shape it's in (so I can leave feedback). It was quite a bit less expensive than some of the others on the page.

It's a Hewlett Packard Model 204 D. "D" as in "Dinosaur".

Does anyone know of a way to put it through its paces??? I only have a VOM and a grid dip meter here so ANY help would be appreciated. 

Best Regards

Patrick

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Re: [Electronics_101] Help Needed: Audio oscillator test

 

Your can connect the speakers from your desktop pc to it.

Jim, K6JMG

vw_beetle_fix_it@yahoo.com wrote:

Hello

Hi everybody.

I just bought an audio oscillator and I could some help in figuring out what kind of shape it's in (so I can leave feedback). It was quite a bit less expensive than some of the others on the page.

It's a Hewlett Packard Model 204 D. "D" as in "Dinosaur".

Does anyone know of a way to put it through its paces??? I only have a VOM and a grid dip meter here so ANY help would be appreciated. 

Best Regards

Patrick

--
Jim

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