Today's Message Index:
----------------------
1. 05:20 AM - Re: OT: analog VOM worth battery cost. (Eric M. Jones)
2. 05:30 AM - Re: OT: analog VOM worth battery cost. (Eric M. Jones)
3. 10:37 AM - Re: OT: analog VOM worth battery cost. (Robert L. Nuckolls, III)
4. 11:04 AM - Resuscitating the Tripplet 630 (Robert L. Nuckolls, III)
5. 08:52 PM - Re: Resuscitating the Tripplet 630 (rayj)
6. 09:03 PM - Re: Resuscitating the Tripplet 630 (Jeff Luckey)
7. 09:44 PM - Re: OT: analog VOM worth battery cost. (rayj)
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Subject: | Re: OT: analog VOM worth battery cost. |
> I have a Triplett 630-NA VOM. I'm wondering if it is a good enough
> quality VOM to justify putting $15 worth of batteries into. Raymond Julian
do not archive
--
Raymond, In this strange internet world you might find somebody who is already
making their own Eveready#413 30V battery. You could easily make your own with
a stack of SR44's (which can be had cheap from Deal Extreme). They wouldn't have
to be the same shape. But ask yourself if you need a new hobby? Remember the
Triplett 630's need calibration too.
If your Green sensibilities are offended by tossing it, might I suggest sealing
it in plastic and burying it in a field to be discovered by archaeologists in
the year 6512. Think how happy they will be and how much it will be worth then!
My answer would be NO. Compared to a Fluke 77 for example, my answer would be "Hell
NO."
Go build your airplane.
--------
Eric M. Jones
www.PerihelionDesign.com
113 Brentwood Drive
Southbridge, MA 01550
(508) 764-2072
emjones(at)charter.net
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=381680#381680
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Subject: | Re: OT: analog VOM worth battery cost. |
One more thing. You can buy the Eveready 413 battery Ebay: . $35.00-$50.00.
Or a lightly used Fluke 77 with leads, free shipping, "buy it now Price" for $50
ALL DAY LONG.
I just bought one (brand spanking new) on Shopgoodwill.com for maybe $11.00
Do not archive.
--------
Eric M. Jones
www.PerihelionDesign.com
113 Brentwood Drive
Southbridge, MA 01550
(508) 764-2072
emjones(at)charter.net
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=381681#381681
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Subject: | Re: OT: analog VOM worth battery cost. |
At 01:37 AM 8/24/2012, you wrote:
Greetings,
I have a Triplet 630-NA VOM. I'm wondering if it is a good enough
quality VOM to justify putting $15 worth of batteries into.
Opinions please.
Some thoughts. I keep analog meters around (including the 630
I purchased in 1961 upon being hired into Boeing) because
they often yield dynamic data that is difficult or impossible
to get from a digital device.
Consider replacing only the 1.5v battery which will
get the X1 ohms function working . . . which is the
most useful in working electrical systems issues
anyway.
Bob . . .
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Subject: | Resuscitating the Tripplet 630 |
After my reply on this thread, I was recalling some
features of the 630 buried pretty deeply in the grey-matter.
I dug mine out and pulled the case off.
Replacing JUST the one battery is still a good idea but
the cell is 'captured' into position in the battery box
by the case. Proper retention of the battery depends on
the HV battery being installed.
Looking at this configuration sparked an idea that was
easy to implement and worked around the fixture problem.
I cut a couple 3/4" pieces of hobby shop brass with a 9/16" i.d. 19/32" o.d.
Emacs!
Tape one piece to the (-) end of AA cell so that you have
a recess about 1/8" deep. Tape the other piece to the (+)
end looking for a recess about 1/2" deep. Make a conductive
"plug" to drop into the (+) cavity. Here's a quick-n-dirty
pair of nuts on a 10-32 screw and trimmed flush with a
Dremel.
Emacs!
Drop the "plug" into the (+) end and place it between
the cell contacts of the 630
Emacs!
This configuration captures the cell between the contacts even
though the hv battery is not present.
Also, I'm pleased to report that the single AA cell excites ALL
resistance ranges EXCEPT the highest range. A little time
on the lathe could produce adapters fitted more closely
to the dimensions of the AA cell and the mating contacts
on the 630. A pleasant distraction . . .
Another approach would be to make a 'plug' from plastic or
wood that emulates the shape of the 30v battery. You'd want
holes in both ends to clear the 630's battery contacts. Then
use the standard C-cell and exploit the original design
goals for cell retention.
Depending on how determined you are to get it all up and
running, there is sufficient volume inside to house three 9v
alkaline batteries. One where the 30v goes, two on each end
of the battery box over the fuses. A bit of wire, some tack
soldering and double-sided tape for battery retention
could give you a 27v 'work-around' that should bring the
x100K range back to life as well.
Bit lots sells an alkaline 9v for $2 or less.
Bottom line is that there may still be more years of useful
utility left in your venerable ol' workhorse. Working the
flight line at Boeing, the Simpson 260 was all the tool
cribs stocked. We fixed a lot of airplanes with this genere'
of measurement tools.
Bob . . .
Message 5
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Subject: | Re: Resuscitating the Tripplet 630 |
Bob,
I replied to your 1st post before I read the 2nd. I can get 10
Panasonic 2450 lithium cells for $12 and I'll machine a little case to
make them fit in the 30V position. I think that should take care of it.
I don't know why, but I just like seeing the needle move. Much more
satisfying then the LCD numbers. Too many sci-fi movies when I was young.
do not archive
Thanks again.
Raymond Julian
Kettle River, MN.
"And you know that I could have me a million more friends,
and all I'd have to lose is my point of view." - John Prine
On 08/24/2012 01:02 PM, Robert L. Nuckolls, III wrote:
> After my reply on this thread, I was recalling some
> features of the 630 buried pretty deeply in the grey-matter.
> I dug mine out and pulled the case off.
>
> Replacing JUST the one battery is still a good idea but
> the cell is 'captured' into position in the battery box
> by the case. Proper retention of the battery depends on
> the HV battery being installed.
>
> Looking at this configuration sparked an idea that was
> easy to implement and worked around the fixture problem.
>
> I cut a couple 3/4" pieces of hobby shop brass with a 9/16" i.d. 19/32" o.d.
>
> Emacs!
>
>
> Tape one piece to the (-) end of AA cell so that you have
> a recess about 1/8" deep. Tape the other piece to the (+)
> end looking for a recess about 1/2" deep. Make a conductive
> "plug" to drop into the (+) cavity. Here's a quick-n-dirty
> pair of nuts on a 10-32 screw and trimmed flush with a
> Dremel.
>
> Emacs!
>
> Drop the "plug" into the (+) end and place it between
> the cell contacts of the 630
>
> Emacs!
>
> This configuration captures the cell between the contacts even
> though the hv battery is not present.
>
> Also, I'm pleased to report that the single AA cell excites ALL
> resistance ranges EXCEPT the highest range. A little time
> on the lathe could produce adapters fitted more closely
> to the dimensions of the AA cell and the mating contacts
> on the 630. A pleasant distraction . . .
>
> Another approach would be to make a 'plug' from plastic or
> wood that emulates the shape of the 30v battery. You'd want
> holes in both ends to clear the 630's battery contacts. Then
> use the standard C-cell and exploit the original design
> goals for cell retention.
>
> Depending on how determined you are to get it all up and
> running, there is sufficient volume inside to house three 9v
> alkaline batteries. One where the 30v goes, two on each end
> of the battery box over the fuses. A bit of wire, some tack
> soldering and double-sided tape for battery retention
> could give you a 27v 'work-around' that should bring the
> x100K range back to life as well.
>
> Bit lots sells an alkaline 9v for $2 or less.
>
> Bottom line is that there may still be more years of useful
> utility left in your venerable ol' workhorse. Working the
> flight line at Boeing, the Simpson 260 was all the tool
> cribs stocked. We fixed a lot of airplanes with this genere'
> of measurement tools.
>
> Bob . . .
>
Message 6
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Subject: | Resuscitating the Tripplet 630 |
When my dad passed away last year I inherited a lot of old electrical
equipment, including a 630.
Finding that meter while sorting thru his stuff brought back lots of
memories of futzing w/ batteries, lamps & alligator clips as a kid - funny
what you remember.
Using 3 9-volters to replace the big battery is a great idea - glad to hear
that 27 volts is enough.
Lots of people, especially younger ones, would just throw-away something
like this but I find it strangely satisfying to keep an older, good-quality
instrument in service, even if it requires a little engineering. Is that
due to age or wisdom???
Pardon the philosophical observations,
-Jeff
_____
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Robert L.
Nuckolls, III
Sent: Friday, August 24, 2012 11:02
Subject: AeroElectric-List: Resuscitating the Tripplet 630
After my reply on this thread, I was recalling some
features of the 630 buried pretty deeply in the grey-matter.
I dug mine out and pulled the case off.
Replacing JUST the one battery is still a good idea but
the cell is 'captured' into position in the battery box
by the case. Proper retention of the battery depends on
the HV battery being installed.
Looking at this configuration sparked an idea that was
easy to implement and worked around the fixture problem.
I cut a couple 3/4" pieces of hobby shop brass with a 9/16" i.d. 19/32" o.d.
Emacs!
Tape one piece to the (-) end of AA cell so that you have
a recess about 1/8" deep. Tape the other piece to the (+)
end looking for a recess about 1/2" deep. Make a conductive
"plug" to drop into the (+) cavity. Here's a quick-n-dirty
pair of nuts on a 10-32 screw and trimmed flush with a
Dremel.
Emacs!
Drop the "plug" into the (+) end and place it between
the cell contacts of the 630
Emacs!
This configuration captures the cell between the contacts even
though the hv battery is not present.
Also, I'm pleased to report that the single AA cell excites ALL
resistance ranges EXCEPT the highest range. A little time
on the lathe could produce adapters fitted more closely
to the dimensions of the AA cell and the mating contacts
on the 630. A pleasant distraction . . .
Another approach would be to make a 'plug' from plastic or
wood that emulates the shape of the 30v battery. You'd want
holes in both ends to clear the 630's battery contacts. Then
use the standard C-cell and exploit the original design
goals for cell retention.
Depending on how determined you are to get it all up and
running, there is sufficient volume inside to house three 9v
alkaline batteries. One where the 30v goes, two on each end
of the battery box over the fuses. A bit of wire, some tack
soldering and double-sided tape for battery retention
could give you a 27v 'work-around' that should bring the
x100K range back to life as well.
Bit lots sells an alkaline 9v for $2 or less.
Bottom line is that there may still be more years of useful
utility left in your venerable ol' workhorse. Working the
flight line at Boeing, the Simpson 260 was all the tool
cribs stocked. We fixed a lot of airplanes with this genere'
of measurement tools.
Bob . . .
No virus found in this message.
Checked by AVG - www.avg.com
Message 7
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Subject: | Re: OT: analog VOM worth battery cost. |
Bob,
Thanks for the reply. I don't have a problem with the money if the
meter was a good one back in the day. I have learned that every thing
that is old and solid looking may not have been high quality when it was
made. I'm just going to use it on the bench for basic trouble shooting
simple electrical things, nothing sophisticated.
I'm going to assume if you're still using one it is worth the $15 bucks
to keep around.
Thanks.
do not archive
Raymond Julian
Kettle River, MN.
"And you know that I could have me a million more friends,
and all I'd have to lose is my point of view." - John Prine
On 08/24/2012 11:46 AM, Robert L. Nuckolls, III wrote:
> <nuckolls.bob@aeroelectric.com>
>
>
> At 01:37 AM 8/24/2012, you wrote:
>
> Greetings,
>
> I have a Triplet 630-NA VOM. I'm wondering if it is a good enough
> quality VOM to justify putting $15 worth of batteries into.
>
> Opinions please.
>
> Some thoughts. I keep analog meters around (including the 630
> I purchased in 1961 upon being hired into Boeing) because
> they often yield dynamic data that is difficult or impossible
> to get from a digital device.
>
> Consider replacing only the 1.5v battery which will
> get the X1 ohms function working . . . which is the
> most useful in working electrical systems issues
> anyway.
>
>
> Bob . . .
>
>
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