| Author |
Message |
Chuck Harris
Guest
|
Posted:
Sat May 07, 2005 8:35 am Post subject:
Re: In the Mkt for a HP Bench DMM |
|
|
Watson A.Name - "Watt Sun, the Dark Remover" wrote:
| Quote: | You can look on Tuckers web site and find the specs on most all these
meters.
Thanks for all the good info. I found a single 3478A on Tucker's
website and it was $795 so I don't think I'll be back there soon.
|
I wonder why tucker let me have mine for so cheap? Cheap isn't usually
their thing. When I was buying and selling a lot of surplus, I would use
5 to 10 cents on a tucker dollar as a guide for what I should bid at
DRMO auctions. Their catalogs used to be a true gem to have.
| Quote: |
In the last wk I've seen the 3478A go for anywhere from $75 to $220 on
ebay, most are well over a hundred. I'm still waiting for another one
to come for bid at a reasonable price. Right now someone has one for
sale, but this is like his first sale, and I don't think anyone wants to
put very much money up for bid because he may be just a fraudster.
|
I think the odds of this guy being a fraud are reasonably large. His
presentation is very polished, and is full of contractual terms that aren't
likely to have occurred to a first time seller. I would think it is more
likely that he has sold a lot on ebay, but has changed his account name
for some reason.
If I were truly interested in this unit, I would contact him, and ask him
why the low seller number... and what was his previous id. His answer might
allow you to bid.
-Chuck
|
|
| Back to top |
|
 |
Watson A.Name - \"Watt Su
Guest
|
Posted:
Sat May 07, 2005 4:35 pm Post subject:
Re: In the Mkt for a HP Bench DMM |
|
|
"Chuck Harris" <cf-NO-SPAM-harris@erols.com> wrote in message
news:XaadnS2pNrLC3OHfRVn-rw@rcn.net...
| Quote: | Watson A.Name - "Watt Sun, the Dark Remover" wrote:
You can look on Tuckers web site and find the specs on most all
these
meters.
Thanks for all the good info. I found a single 3478A on Tucker's
website and it was $795 so I don't think I'll be back there soon.
I wonder why tucker let me have mine for so cheap? Cheap isn't
usually
their thing. When I was buying and selling a lot of surplus, I would
use
5 to 10 cents on a tucker dollar as a guide for what I should bid at
DRMO auctions. Their catalogs used to be a true gem to have.
In the last wk I've seen the 3478A go for anywhere from $75 to $220
on
ebay, most are well over a hundred. I'm still waiting for another
one
to come for bid at a reasonable price. Right now someone has one
for
sale, but this is like his first sale, and I don't think anyone
wants to
put very much money up for bid because he may be just a fraudster.
I think the odds of this guy being a fraud are reasonably large. His
presentation is very polished, and is full of contractual terms that
aren't
likely to have occurred to a first time seller. I would think it is
more
likely that he has sold a lot on ebay, but has changed his account
name
for some reason.
|
Yeah, I hear you.
| Quote: | If I were truly interested in this unit, I would contact him, and ask
him
why the low seller number... and what was his previous id. His answer
might allow you to bid.
|
Trouble is that he could tell me 'I used to be joeblow' and if I tried
to find out anything on Ebay, I would just get a 'no longer a valid ID'
or something like that. He could've been a crook but w/o info from
Ebay, no one will know.
But he could have had previous experience on another site like Yahoo
Auction. He might be experienced, but new to Ebay. But your scenario
seems to be a lot more likely.
One othe thought. He could've been an employee of another experienced
seller and has decided to go out on his own.
One thing that I've noticed about Ebayers is that the IDs they use
seldom reflect their business or real name.
> -Chuck |
|
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|
 |
Bob Parnass
Guest
|
Posted:
Sun May 08, 2005 4:35 pm Post subject:
Re: In the Mkt for a HP Bench DMM |
|
|
On Fri, 06 May 2005 07:46:02 -0400, Chuck Harris wrote:
| Quote: | My only regret is I forgot that the HP3478A has a reduced measurement
range. It is only 300V full scale! Why did they do that?
|
That's one of the main things I didn't like about my HP3478As.
I found the (relatively) small LCD display difficult to see.
My favorite bench meter is the Fluke 8506A, followed by
the HP3456A. They are full rack width instruments, but
the bright red LED displays make them way easier to see
than the HP3478A. The Fluke 8506A's super large LEDs
are especially easy to see.
I confess to using a handheld Fluke 87 III more than
any of them. It does what I need, has large LCD digits,
and its small size lets me use it anywhere. If I could
keep only one DMM, it would this one.
--
=========================================================================
Bob Parnass, AJ9S GNU/Linux User http://parnass.com
|
|
| Back to top |
|
 |
Gary Schafer
Guest
|
Posted:
Sun May 08, 2005 10:27 pm Post subject:
Re: In the Mkt for a HP Bench DMM |
|
|
On Sun, 08 May 2005 11:51:09 GMT, Bob Parnass
<not-for-mail@fake.invalid> wrote:
| Quote: | On Fri, 06 May 2005 07:46:02 -0400, Chuck Harris wrote:
My only regret is I forgot that the HP3478A has a reduced measurement
range. It is only 300V full scale! Why did they do that?
That's one of the main things I didn't like about my HP3478As.
I found the (relatively) small LCD display difficult to see.
My favorite bench meter is the Fluke 8506A, followed by
the HP3456A. They are full rack width instruments, but
the bright red LED displays make them way easier to see
than the HP3478A. The Fluke 8506A's super large LEDs
are especially easy to see.
I confess to using a handheld Fluke 87 III more than
any of them. It does what I need, has large LCD digits,
and its small size lets me use it anywhere. If I could
keep only one DMM, it would this one.
|
I am like you Bob, I have a Fluke 87 lll that I use most of the time
too. Very handy and dependable. When I need higher accuracy I fire up
the HP 3456A. Setting power supplies in test equipment or calibrating
other meters etc. It has some nice math functions that are handy
sometimes too. Another thing that is nice abut the 3456A that people
don't think about too often is the input impedance. It has 10 to the
10th input resistance through the 10 volt range.
The Fluke 87 lll and similar meters are 10 meg ohm input resistance on
all ranges.
The high input resistance on the 3456A and those type meters are handy
some times. I have a Fluke voltage reference that requires a high
input meter in order to read it. Or you other wise must use another
reference and a null meter. Most references can not be read with a 10
megohm meter.
The ohm meter on the 3456A will read to 1 gig ohm. Handy sometimes.
Warm-up drift is excellent on the 3456A.
73
Gary K4FMX |
|
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|
 |
Jim Adney
Guest
|
Posted:
Mon May 09, 2005 7:37 am Post subject:
Re: In the Mkt for a HP Bench DMM |
|
|
| Quote: | If you really want 5-1/2 digits, I have some 34650s which are that
wide, but they are more expensive and don't have the frequency counter
capability. They also consist of a display and your choice of plugons.
|
How about these? They are available with a variety of VOM plugons with
various capabilities. I haven't sold one of these before, but I have
them all fixed up and calibrated. They are old, but they seem to work
quite well once I get the bugs out.
The price would depend on the plugon that you wanted with it. What
kind of measuring capabilities are you after?
-
-----------------------------------------------
Jim Adney jadney@vwtype3.org
Madison, WI 53711 USA
----------------------------------------------- |
|
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|
 |
Watson A.Name - \"Watt Su
Guest
|
Posted:
Tue May 10, 2005 8:35 am Post subject:
Re: In the Mkt for a HP Bench DMM |
|
|
"Chuck Harris" <cf-NO-SPAM-harris@erols.com> wrote in message
news:XaadnS2pNrLC3OHfRVn-rw@rcn.net...
| Quote: | Watson A.Name - "Watt Sun, the Dark Remover" wrote:
You can look on Tuckers web site and find the specs on most all
these
meters.
Thanks for all the good info. I found a single 3478A on Tucker's
website and it was $795 so I don't think I'll be back there soon.
I wonder why tucker let me have mine for so cheap? Cheap isn't
usually
their thing. When I was buying and selling a lot of surplus, I would
use
5 to 10 cents on a tucker dollar as a guide for what I should bid at
DRMO auctions. Their catalogs used to be a true gem to have.
In the last wk I've seen the 3478A go for anywhere from $75 to $220
on
ebay, most are well over a hundred. I'm still waiting for another
one
to come for bid at a reasonable price. Right now someone has one
for
sale, but this is like his first sale, and I don't think anyone
wants to
put very much money up for bid because he may be just a fraudster.
I think the odds of this guy being a fraud are reasonably large. His
presentation is very polished, and is full of contractual terms that
aren't
likely to have occurred to a first time seller. I would think it is
more
likely that he has sold a lot on ebay, but has changed his account
name
for some reason.
If I were truly interested in this unit, I would contact him, and ask
him
why the low seller number... and what was his previous id. His answer
might
allow you to bid.
-Chuck
|
Well, a few minutes before it ended, I bid on a HP 3478A DMM, and no one
else bid on it, so I won, for $75.00. It's from Teoutlet, which is
Tucker. I gotta wait for them to contact me for some reason, because
they have to charge me for sales tax because I live in Calif. It's
something less than six bucks, With shipping, it'll come to somewhat
under a hundred. At that price, I could buy another and have a spare.
;-)
So now I gotta get some manuals, and I'd really like some 4-wire test
probes. I've never seen them, but knowing HP and the likes, a new set
will probably cost a lot.
But here's the question I hinted at a while back, that I was gonna ask.
I think I might've run across something like this when I did a search
for Keithley stuff on Ebay. What I wonder is how do I automate a test
jig. I took a double pole, 6 position rotary switch and mounted it and
some terminal strips to a piece of wood. I can then connect my DMM to
the wipers, so I can then run wires to the different test points on the
jig and then just turn the rotary switch to whatever place I want to
measure. I would guess that there is something similar, but all
electronic from somewhere. I don't remember ever seeing anything like
it from HP or Fluke. I think Keithley may have something like it, tho.
A bunch of relays with driver transistors could be connected to a
parallel port and controlled by a program on a PC. |
|
| Back to top |
|
 |
Robert Baer
Guest
|
Posted:
Tue May 10, 2005 1:39 pm Post subject:
Re: In the Mkt for a HP Bench DMM |
|
|
Watson A.Name - "Watt Sun, the Dark Remover" wrote:
| Quote: | "Chuck Harris" <cf-NO-SPAM-harris@erols.com> wrote in message
news:XaadnS2pNrLC3OHfRVn-rw@rcn.net...
Watson A.Name - "Watt Sun, the Dark Remover" wrote:
You can look on Tuckers web site and find the specs on most all
these
meters.
Thanks for all the good info. I found a single 3478A on Tucker's
website and it was $795 so I don't think I'll be back there soon.
I wonder why tucker let me have mine for so cheap? Cheap isn't
usually
their thing. When I was buying and selling a lot of surplus, I would
use
5 to 10 cents on a tucker dollar as a guide for what I should bid at
DRMO auctions. Their catalogs used to be a true gem to have.
In the last wk I've seen the 3478A go for anywhere from $75 to $220
on
ebay, most are well over a hundred. I'm still waiting for another
one
to come for bid at a reasonable price. Right now someone has one
for
sale, but this is like his first sale, and I don't think anyone
wants to
put very much money up for bid because he may be just a fraudster.
I think the odds of this guy being a fraud are reasonably large. His
presentation is very polished, and is full of contractual terms that
aren't
likely to have occurred to a first time seller. I would think it is
more
likely that he has sold a lot on ebay, but has changed his account
name
for some reason.
If I were truly interested in this unit, I would contact him, and ask
him
why the low seller number... and what was his previous id. His answer
might
allow you to bid.
-Chuck
Well, a few minutes before it ended, I bid on a HP 3478A DMM, and no one
else bid on it, so I won, for $75.00. It's from Teoutlet, which is
Tucker. I gotta wait for them to contact me for some reason, because
they have to charge me for sales tax because I live in Calif. It's
something less than six bucks, With shipping, it'll come to somewhat
under a hundred. At that price, I could buy another and have a spare.
;-)
So now I gotta get some manuals, and I'd really like some 4-wire test
probes. I've never seen them, but knowing HP and the likes, a new set
will probably cost a lot.
But here's the question I hinted at a while back, that I was gonna ask.
I think I might've run across something like this when I did a search
for Keithley stuff on Ebay. What I wonder is how do I automate a test
jig. I took a double pole, 6 position rotary switch and mounted it and
some terminal strips to a piece of wood. I can then connect my DMM to
the wipers, so I can then run wires to the different test points on the
jig and then just turn the rotary switch to whatever place I want to
measure. I would guess that there is something similar, but all
electronic from somewhere. I don't remember ever seeing anything like
it from HP or Fluke. I think Keithley may have something like it, tho.
A bunch of relays with driver transistors could be connected to a
parallel port and controlled by a program on a PC.
The relay method would be better; less kludgy. |
I like the Axicom V23105-A5003-A201 for low to medium voltages, and
the NEC MR62-12UKSRY for higher voltages; both are 12V 960 ohm coil DPDT
16 pin DIP relays.
I wire up a socket and plug them in; makes it easy to replace when i
abuse them.
Mouser carries both. |
|
| Back to top |
|
 |
Watson A.Name - \"Watt Su
Guest
|
Posted:
Tue May 10, 2005 4:26 pm Post subject:
Re: In the Mkt for a HP Bench DMM |
|
|
"Robert Baer" <robertbaer@earthlink.net> wrote in message
news:fr_fe.357$r7.349@newsread1.news.pas.earthlink.net...
| Quote: | Watson A.Name - "Watt Sun, the Dark Remover" wrote:
[snip] |
| Quote: | Well, a few minutes before it ended, I bid on a HP 3478A DMM, and no
one
else bid on it, so I won, for $75.00. It's from Teoutlet, which is
Tucker. I gotta wait for them to contact me for some reason,
because
they have to charge me for sales tax because I live in Calif. It's
something less than six bucks, With shipping, it'll come to
somewhat
under a hundred. At that price, I could buy another and have a
spare.
;-)
So now I gotta get some manuals, and I'd really like some 4-wire
test
probes. I've never seen them, but knowing HP and the likes, a new
set
will probably cost a lot.
But here's the question I hinted at a while back, that I was gonna
ask.
I think I might've run across something like this when I did a
search
for Keithley stuff on Ebay. What I wonder is how do I automate a
test
jig. I took a double pole, 6 position rotary switch and mounted it
and
some terminal strips to a piece of wood. I can then connect my DMM
to
the wipers, so I can then run wires to the different test points on
the
jig and then just turn the rotary switch to whatever place I want to
measure. I would guess that there is something similar, but all
electronic from somewhere. I don't remember ever seeing anything
like
it from HP or Fluke. I think Keithley may have something like it,
tho.
A bunch of relays with driver transistors could be connected to a
parallel port and controlled by a program on a PC.
|
| Quote: | The relay method would be better; less kludgy.
I like the Axicom V23105-A5003-A201 for low to medium voltages, and
the NEC MR62-12UKSRY for higher voltages; both are 12V 960 ohm coil
DPDT
16 pin DIP relays.
I wire up a socket and plug them in; makes it easy to replace when
i
abuse them.
Mouser carries both.
|
Thanks for the info. I had several 5V dip relays that I got from rat
shack long ago on clearance. Probably stuck away in the garage in some
box, still in their blister packs. I wish I could get an old Strowger
switch from the '50s telephone surplus stuff. They're a rotary stepping
switch, with lots of contacts. |
|
| Back to top |
|
 |
Chuck Harris
Guest
|
Posted:
Tue May 10, 2005 4:35 pm Post subject:
Re: In the Mkt for a HP Bench DMM |
|
|
Watson A.Name - "Watt Sun, the Dark Remover" wrote:
| Quote: | Well, a few minutes before it ended, I bid on a HP 3478A DMM, and no one
else bid on it, so I won, for $75.00. It's from Teoutlet, which is
Tucker. I gotta wait for them to contact me for some reason, because
they have to charge me for sales tax because I live in Calif. It's
something less than six bucks, With shipping, it'll come to somewhat
under a hundred. At that price, I could buy another and have a spare.
;-)
|
Hi Watson, Great! I don't know why people are bidding up that guy that
has *zero* sales, and a *trust-me* price on shipping. He is already up to
$76! And as you know, your tucker meter was sitting there unmolested.
I bet another TE 3478A appears, exactly the same terms, before the week
is out.
| Quote: |
So now I gotta get some manuals, and I'd really like some 4-wire test
probes. I've never seen them, but knowing HP and the likes, a new set
will probably cost a lot.
|
As to the manual, a complete 3478A manual can be downloaded for free from
http://www.logsa.mil
click on the icon for test and equiptment publications, accept their
"terms" (believe me, you have a right to be there!), and enter a title
search on "3478A" (caps are important!) And there it will be.
It appears to be the standard HP manual.
| Quote: | But here's the question I hinted at a while back, that I was gonna ask.
I think I might've run across something like this when I did a search
for Keithley stuff on Ebay. What I wonder is how do I automate a test
jig. I took a double pole, 6 position rotary switch and mounted it and
some terminal strips to a piece of wood. I can then connect my DMM to
the wipers, so I can then run wires to the different test points on the
jig and then just turn the rotary switch to whatever place I want to
measure. I would guess that there is something similar, but all
electronic from somewhere. I don't remember ever seeing anything like
it from HP or Fluke. I think Keithley may have something like it, tho.
A bunch of relays with driver transistors could be connected to a
parallel port and controlled by a program on a PC.
|
HP sold a hpib controlled relay actuator, HP59306A. It usually goes for
spit on ebay. It is simple to program, and makes these kind of chores
easy.
-Chuck |
|
| Back to top |
|
 |
Robert Baer
Guest
|
Posted:
Tue May 10, 2005 10:36 pm Post subject:
Re: In the Mkt for a HP Bench DMM |
|
|
Watson A.Name - "Watt Sun, the Dark Remover" wrote:
| Quote: | "Robert Baer" <robertbaer@earthlink.net> wrote in message
news:fr_fe.357$r7.349@newsread1.news.pas.earthlink.net...
Watson A.Name - "Watt Sun, the Dark Remover" wrote:
[snip]
Well, a few minutes before it ended, I bid on a HP 3478A DMM, and no
one
else bid on it, so I won, for $75.00. It's from Teoutlet, which is
Tucker. I gotta wait for them to contact me for some reason,
because
they have to charge me for sales tax because I live in Calif. It's
something less than six bucks, With shipping, it'll come to
somewhat
under a hundred. At that price, I could buy another and have a
spare.
;-)
So now I gotta get some manuals, and I'd really like some 4-wire
test
probes. I've never seen them, but knowing HP and the likes, a new
set
will probably cost a lot.
But here's the question I hinted at a while back, that I was gonna
ask.
I think I might've run across something like this when I did a
search
for Keithley stuff on Ebay. What I wonder is how do I automate a
test
jig. I took a double pole, 6 position rotary switch and mounted it
and
some terminal strips to a piece of wood. I can then connect my DMM
to
the wipers, so I can then run wires to the different test points on
the
jig and then just turn the rotary switch to whatever place I want to
measure. I would guess that there is something similar, but all
electronic from somewhere. I don't remember ever seeing anything
like
it from HP or Fluke. I think Keithley may have something like it,
tho.
A bunch of relays with driver transistors could be connected to a
parallel port and controlled by a program on a PC.
The relay method would be better; less kludgy.
I like the Axicom V23105-A5003-A201 for low to medium voltages, and
the NEC MR62-12UKSRY for higher voltages; both are 12V 960 ohm coil
DPDT
16 pin DIP relays.
I wire up a socket and plug them in; makes it easy to replace when
i
abuse them.
Mouser carries both.
Thanks for the info. I had several 5V dip relays that I got from rat
shack long ago on clearance. Probably stuck away in the garage in some
box, still in their blister packs. I wish I could get an old Strowger
switch from the '50s telephone surplus stuff. They're a rotary stepping
switch, with lots of contacts.
The rotary steppers sometimes show up in ham electronic flea markets; |
otherwise snoop in electronic surplus stores. |
|
| Back to top |
|
 |
Robert Baer
Guest
|
Posted:
Tue May 10, 2005 10:39 pm Post subject:
Re: In the Mkt for a HP Bench DMM |
|
|
Chuck Harris wrote:
| Quote: | Watson A.Name - "Watt Sun, the Dark Remover" wrote:
Well, a few minutes before it ended, I bid on a HP 3478A DMM, and no one
else bid on it, so I won, for $75.00. It's from Teoutlet, which is
Tucker. I gotta wait for them to contact me for some reason, because
they have to charge me for sales tax because I live in Calif. It's
something less than six bucks, With shipping, it'll come to somewhat
under a hundred. At that price, I could buy another and have a spare.
;-)
Hi Watson, Great! I don't know why people are bidding up that guy that
has *zero* sales, and a *trust-me* price on shipping. He is already up to
$76! And as you know, your tucker meter was sitting there unmolested.
I bet another TE 3478A appears, exactly the same terms, before the week
is out.
So now I gotta get some manuals, and I'd really like some 4-wire test
probes. I've never seen them, but knowing HP and the likes, a new set
will probably cost a lot.
As to the manual, a complete 3478A manual can be downloaded for free from
http://www.logsa.mil
click on the icon for test and equiptment publications, accept their
"terms" (believe me, you have a right to be there!), and enter a title
search on "3478A" (caps are important!) And there it will be.
It appears to be the standard HP manual.
But here's the question I hinted at a while back, that I was gonna ask.
I think I might've run across something like this when I did a search
for Keithley stuff on Ebay. What I wonder is how do I automate a test
jig. I took a double pole, 6 position rotary switch and mounted it and
some terminal strips to a piece of wood. I can then connect my DMM to
the wipers, so I can then run wires to the different test points on the
jig and then just turn the rotary switch to whatever place I want to
measure. I would guess that there is something similar, but all
electronic from somewhere. I don't remember ever seeing anything like
it from HP or Fluke. I think Keithley may have something like it, tho.
A bunch of relays with driver transistors could be connected to a
parallel port and controlled by a program on a PC.
HP sold a hpib controlled relay actuator, HP59306A. It usually goes for
spit on ebay. It is simple to program, and makes these kind of chores
easy.
-Chuck
My browser sez "www.logsa.mil could not be found". |
What's up? |
|
| Back to top |
|
 |
Chuck Harris
Guest
|
Posted:
Tue May 10, 2005 10:48 pm Post subject:
Re: In the Mkt for a HP Bench DMM |
|
|
Robert Baer wrote:
| Quote: | HP sold a hpib controlled relay actuator, HP59306A. It usually goes for
spit on ebay. It is simple to program, and makes these kind of chores
easy.
-Chuck
My browser sez "www.logsa.mil could not be found".
What's up?
|
It's the usual thing, I thought I remembered the address, and didn't double
check. The actual address is:
https://www.logsa.army.mil/pubs.htm
Your browser must have 128bit encription, or better, or they won't let you play.
-Chuck |
|
| Back to top |
|
 |
Watson A.Name - \"Watt Su
Guest
|
Posted:
Wed May 11, 2005 11:03 am Post subject:
Re: In the Mkt for a HP Bench DMM |
|
|
"Chuck Harris" <cf-NO-SPAM-harris@erols.com> wrote in message
news:Te6dnUONCucuOR3fRVn-iA@rcn.net...
| Quote: | Watson A.Name - "Watt Sun, the Dark Remover" wrote:
Well, a few minutes before it ended, I bid on a HP 3478A DMM, and no
one
else bid on it, so I won, for $75.00. It's from Teoutlet, which is
Tucker. I gotta wait for them to contact me for some reason,
because
they have to charge me for sales tax because I live in Calif. It's
something less than six bucks, With shipping, it'll come to
somewhat
under a hundred. At that price, I could buy another and have a
spare.
;-)
Hi Watson, Great! I don't know why people are bidding up that guy
that
has *zero* sales, and a *trust-me* price on shipping. He is already
up to
$76! And as you know, your tucker meter was sitting there unmolested.
|
The final bid was $143.50 so it looks like the bidders trusted the
seller. Somewhat. Some 3478As go for over $200.
| Quote: | I bet another TE 3478A appears, exactly the same terms, before the
week
is out.
So now I gotta get some manuals, and I'd really like some 4-wire
test
probes. I've never seen them, but knowing HP and the likes, a new
set
will probably cost a lot.
As to the manual, a complete 3478A manual can be downloaded for free
from
http://www.logsa.mil
|
That didn't work, so I added www.logsa.army.mil. I got time out error
on that, tho. I tried again just now, and again got a timeout error.
Looks like they're blocking me, and I'll never be able to access that
website.
| Quote: | click on the icon for test and equiptment publications, accept their
"terms" (believe me, you have a right to be there!), and enter a title
search on "3478A" (caps are important!) And there it will be.
It appears to be the standard HP manual.
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Looks like I'm stuck with buying one. I've seen some on CD-R, for
cheap. I wonder how good or bad the image quality is.
| Quote: | But here's the question I hinted at a while back, that I was gonna
ask.
I think I might've run across something like this when I did a
search
for Keithley stuff on Ebay. What I wonder is how do I automate a
test
jig. I took a double pole, 6 position rotary switch and mounted it
and
some terminal strips to a piece of wood. I can then connect my DMM
to
the wipers, so I can then run wires to the different test points on
the
jig and then just turn the rotary switch to whatever place I want to
measure. I would guess that there is something similar, but all
electronic from somewhere. I don't remember ever seeing anything
like
it from HP or Fluke. I think Keithley may have something like it,
tho.
A bunch of relays with driver transistors could be connected to a
parallel port and controlled by a program on a PC.
HP sold a hpib controlled relay actuator, HP59306A. It usually goes
for
spit on ebay. It is simple to program, and makes these kind of chores
easy.
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I found a few on Ebay for anywhere from $15 to almost $200. I checked
out a pic of one, and it looks like it is connected to the outside world
with a GPIB or HPIB cable. I don't have one of those and from what I've
seen they cost major money new, and they're uncommon in the used or
surplus world.
I suppose that the thing can be actuated manually. But then I've
already got the rotary switch that I mickey moused, which works to a
certain point. And I feel real confident about its simplicty and
operation.
Thanks for the info.
> -Chuck |
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Robert Baer
Guest
|
Posted:
Wed May 11, 2005 11:32 am Post subject:
Re: In the Mkt for a HP Bench DMM |
|
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Chuck Harris wrote:
| Quote: | Robert Baer wrote:
HP sold a hpib controlled relay actuator, HP59306A. It usually goes for
spit on ebay. It is simple to program, and makes these kind of chores
easy.
-Chuck
My browser sez "www.logsa.mil could not be found".
What's up?
It's the usual thing, I thought I remembered the address, and didn't double
check. The actual address is:
https://www.logsa.army.mil/pubs.htm
Your browser must have 128bit encription, or better, or they won't let
you play.
-Chuck
That works! |
Thanks. |
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Watson A.Name - \"Watt Su
Guest
|
Posted:
Wed May 11, 2005 11:59 am Post subject:
Re: In the Mkt for a HP Bench DMM |
|
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"Chuck Harris" <cf-NO-SPAM-harris@erols.com> wrote in message
news:XeSdnRFwLvtgbh3fRVn-jw@rcn.net...
| Quote: | Robert Baer wrote:
HP sold a hpib controlled relay actuator, HP59306A. It usually
goes for
spit on ebay. It is simple to program, and makes these kind of
chores
easy.
-Chuck
My browser sez "www.logsa.mil could not be found".
What's up?
It's the usual thing, I thought I remembered the address, and didn't
double
check. The actual address is:
https://www.logsa.army.mil/pubs.htm
Your browser must have 128bit encription, or better, or they won't let
you play. |
Thanks. I finally got on, and d/l'd the .PDF, almost 2.5 megs. I saw
that it has some gotchas. Like it has a CMOS mem backup battery, which
can go bad or leak. I haven't had a chance to look at the parts list
but hopefully it's a lithium, which don't seem to get thegrunge like
some old batteries. Back in the late '80s we upgraded over 300 ATs with
386 MoBos, and I used to pull off the Varta mem backup batteries that
were on the old 286 MoBos and I put 'em in a cardboard box in a
cupboard. Later, the whole bottom of the box turned brown from the
leakage and I had to almost treat them as toxic waste.
The 3478A that I bid on looke a bit beat up in the pic. I'm hoping that
the thing's in working order. I haven't yet heard from the company,
which is supposed to contact me in two business days. I'll have to
contct them tomorrows.
> -Chuck |
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