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 Post subject: Holy Triplett 630 Type 5
PostPosted: Sep Sun 12, 2021 3:00 pm 
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Joined: Aug Wed 04, 2021 3:43 pm
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I'm cleaning up and checking out 2 more meters today. A Triplett 630 type 5 and a Simpson 260 series 6. I'm very impressed with the Triplett over the Simpson so far. The Triplett needs a ohms adj pot as the one in here was corroded.

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What can I use to bring the case back to life. I thought about a light polish using my rotary tool and a buff wheel on it?

Is the red selector switch knob just pressed onto the switch shaft? I want to remove it as it jiggles and I want to have a look.

In hindsight, I guess the Simpson isn't too bad. So far I kinda prefer the 630 over the 260.....Time will tell as the 260 feels like an extension of me. I took computer electronics in High School in the early 80's and the 260 was the king then. I also took a vocational class in Electronics in the late 80's and the 260 was still leader of the pack.

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I guess it feels like an old friend. What is everyone's thoughts on the 2?

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 Post subject: Re: Holy Triplett 630 Type 5
PostPosted: Sep Sun 12, 2021 6:14 pm 
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The 630 knob is pressed on and held by a spring clip. It should just pull off. Don't lose the clip.


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 Post subject: Re: Holy Triplett 630 Type 5
PostPosted: Sep Sun 12, 2021 6:22 pm 
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bob91343 wrote:
The 630 knob is pressed on and held by a spring clip. It should just pull off. Don't lose the clip.


Thank you. I'll be careful.

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 Post subject: Re: Holy Triplett 630 Type 5
PostPosted: Sep Sun 12, 2021 6:26 pm 
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Joined: Jan Mon 18, 2010 2:13 am
Posts: 22683
Location: Dayton Ohio
I found this Triplett 630 type 3 at a hamfest in Michigan last fall (one of the few hamfests available to attend during 2020)

It was broken and filthy, but all parts were there.
I used epoxy to repair all broken pieces and cracks and cleaned it up, and it turned out to be a good working and accurate meter!
The only issue is the odd battery needed for the high resistance range.

Oh, it even had the owners manual tucked inside :D

-Steve


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 Post subject: Re: Holy Triplett 630 Type 5
PostPosted: Sep Sun 12, 2021 6:45 pm 
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Location: Sunbury, Ohio 43074
To bring the bakelite case back to life, try some NOVUS-2 followed by NOVUS-1. I'd try it on the back first. NOVUS 2 has a very fine jewelers grade abrasive in it, safe for polishing scratches out of plastic. It should work fine to get off that cruddy coating old bakelite seems to attract.

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 Post subject: Re: Holy Triplett 630 Type 5
PostPosted: Sep Sun 12, 2021 6:49 pm 
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Barry H Bennett wrote:
To bring the bakelite case back to life, try some NOVUS-2 followed by NOVUS-1. I'd try it on the back first. NOVUS 2 has a very fine jewelers grade abrasive in it, safe for polishing scratches out of plastic. It should work fine to get off that cruddy coating old bakelite seems to attract.


I've never heard of it before? I will pick some up and try it. I'm refurbishing multiple meters with this type of case.

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 Post subject: Re: Holy Triplett 630 Type 5
PostPosted: Sep Sun 12, 2021 7:02 pm 
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NOVUS-3 has a coarser grit for deeper scratches. I use all 3. Stuff isn't cheap tho.

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 Post subject: Re: Holy Triplett 630 Type 5
PostPosted: Sep Sun 12, 2021 7:03 pm 
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I replaced that 30V battery with a jack and external wall wart power supply. Works great.


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 Post subject: Re: Holy Triplett 630 Type 5
PostPosted: Sep Sun 12, 2021 8:19 pm 
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bob91343 wrote:
I replaced that 30V battery with a jack and external wall wart power supply. Works great.


Now that's a good idea if your keeping it on the bench.

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 Post subject: Re: Holy Triplett 630 Type 5
PostPosted: Sep Mon 13, 2021 2:11 am 
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The catch is there are no calibrations except maybe AC? on the 630. That is good as long as the resistors don't change value because I think they are all at least 1% types but the one I owned had the old black types that I have seen get a little out. Or if there is a problem with the meter itself that affects the calibration, you are out of luck, like on any meter. I have a 260 and have the ability to calibrate it against a calibrated lab grade digital meter. I changed one resistor at least in my 630 because it read just a little low on DC ranges. But in ideal circumstances a meter with precision resistors ought to be more reliable than one with adjustable cal.

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 Post subject: Re: Holy Triplett 630 Type 5
PostPosted: Sep Mon 13, 2021 2:32 pm 
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I would be extremely careful using abrasive polishes such as Novus on bakelite, because bakelite is different from plastic which is uniform through out its thickness. You might want to give https://www.tubesandmore.com/products/polish-magnolia-glayzit-refinisher-restores-bakelite a try, it is designed to restore bakelite.


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 Post subject: Re: Holy Triplett 630 Type 5
PostPosted: Sep Mon 13, 2021 4:49 pm 
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Alan S wrote:
I would be extremely careful using abrasive polishes such as Novus on bakelite, because bakelite is different from plastic which is uniform through out its thickness. You might want to give https://www.tubesandmore.com/products/polish-magnolia-glayzit-refinisher-restores-bakelite a try, it is designed to restore bakelite.


I was wondering about that. Thank you. My wife and I owned a small car lot in Florida for 7 years and I have some insight into polish, compound and wet sanding. It's not something I'll venture into lightly.

I have a series 2 Simpson 260 case I can practice on.

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 Post subject: Re: Holy Triplett 630 Type 5
PostPosted: Sep Mon 13, 2021 10:03 pm 
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The grit in NOVUS-2 is so fine as to be, imho, perfectly safe for bakelite. It's not going to remove any material. When used on plastic, it's only abrasive enough to remove mars, not scratches. For scratches, you can try NOVUS-3, but even that may not be gritty enough.

However, I was suggesting NOVUS-2 as a max, to remove all the surface dirt, and then polish off with NOVUS-1 which has no grit at all.

Try it on a spot on the back, or inside the case. I think you'll be pleasantly surprised.

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 Post subject: Re: Holy Triplett 630 Type 5
PostPosted: Oct Sun 10, 2021 11:12 pm 
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Barry H Bennett wrote:
The grit in NOVUS-2 is so fine as to be, imho, perfectly safe for bakelite. It's not going to remove any material. When used on plastic, it's only abrasive enough to remove mars, not scratches. For scratches, you can try NOVUS-3, but even that may not be gritty enough.

However, I was suggesting NOVUS-2 as a max, to remove all the surface dirt, and then polish off with NOVUS-1 which has no grit at all.

Try it on a spot on the back, or inside the case. I think you'll be pleasantly surprised.


The Novus-2 and 1 worked great on the 630. Thanks.

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 Post subject: Re: Holy Triplett 630 Type 5
PostPosted: Oct Mon 11, 2021 1:45 am 
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The 630 with the 30 volt battery can fry low voltage semiconductors , if one forgets what ohms scale they have it on .

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 Post subject: Re: Holy Triplett 630 Type 5
PostPosted: Oct Mon 11, 2021 1:47 am 
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Joined: Jan Tue 10, 2012 8:39 am
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I never saw that happen. I think the current is too small for that.


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