Re: [volt-nuts] Serious problems fluke 731A, 720 and solartron
Steve,
You must have something to do with aviation.
My meter just arrived in Oak Ridge yesterday. Hopefully, it will be on the
way to England later this week. Their turn around time estimate is 4 weeks.
Hopefully, I will have it back by first part of November.
I found the folks in Oak Ridge very friendly and helpful. The lady I spoke
with offered to try to find a manual for the 7081 but did not have any. She
did, though, have an operating manual for the 7061 that she sent me in .PDF
form. If anyone wants it, let me know. It is about 1 MB in size. I have
not looked to see if one is posted anywhere around the net or not.
Also, I found a complete set of used manuals for the 7081 (Operating Part I,
Operating Part II, and Service) at Manuals Plus and bought them. They have
yet to arrive.
I am anxious to see what they find in England and how it performs when it
gets back.
Joe
-----Original Message-----
From: volt-nuts-bounces@febo.com [mailto:volt-nuts-bounces@febo.com]On
Behalf Of Steve Krull
Sent: Tuesday, October 04, 2011 1:15 PM
To: volt-nuts@febo.com
Subject: Re: [volt-nuts] Serious problems fluke 731A, 720 and solartron
Joe,
I was within a couple of hundred yards of your 7081 this past week, if
it shipped to England without any delay! The Ametek/Solartron building
is just up the road from our pilot training center at Farnborough
Airport and I was there for meetings this past week. I had intended to
wander up the road and see if there was anyone left from the test
equipment group but time got away from me. The closest I got was driving
by the entrance to the industrial park.
While in England I did manage, through a friend, to pick up a set of
Solartron test leads with banana plugs, and he's going to see if he can
find his Kelvin clip set and probe set too. With the leads, good food,
good ale, good weather, and good company, it was a great trip. I
generally have at least one meeting a year at Farnborough and Gatwick
airports so I hope to eventually make it up the road to
Ametek/Solartron. Not sure if I want to take my 7081 in my luggage but I
may yet.
Steve
On Sun, Sep 25, 2011 at 11:31 AM, J. L. Trantham wrote:
Fred,
I have recently acquired a Solartron 7081 and have had a lot of fun
getting
to know the meter. In an effort to get it 'calibrated', I chased down
the
US branch of AMETEK, the company that now apparently owns Solartron.
I
shipped my meter to them yesterday and they will ship it to England
for
calibration, repair and alignment, as needed. The 7081 ceased
production in
1998 and full support ended in 2008 but it is still supported, 'best
endeavours'.
When I was on the phone with them this AM to give them my credit card
information, I asked if they still supported the 7061, remembering
this
thread. She said the 7061 is still on the list of supported
equipment. So,
worst case scenario, you could contact AMETEK and see what options
might
exist for your 7061.
Joe
-----Original Message-----
From: volt-nuts-bounces@febo.com [mailto:volt-nuts-bounces@febo.com]On
Behalf Of Fred Schneider
Sent: Thursday, September 29, 2011 5:35 PM
To: Discussion of precise voltage measurement
Subject: Re: [volt-nuts] Serious problems fluke 731A, 720 and
solartron
The voltage collapses. I have to measure how much but not just a few
uV.
More like 200 mV if I remember it right. I know it is a resitive
divider but
the influence on each other is getting worse if it is on 24/7,
another sign
something is wrong. The 1V influences akso the 10 V so you keep it
adjusting. If i set 10 V correct and then the 1 V's the 10 V is off
again.
The 845 AB had its nicads removed and they placed a big zener instead.
The
most important thing, I made a regulated and good filtered
powersupply. I
placed the pcb for that in the space the nicds were mounted.
I also have a HP frequency standard that had a batterybox. But they
were
dead and i did not needed that so now i build a trimble thunderbolt
into
that space and used the 100 KHz output of the HP for the 10 MHz. That
is the
advantage of having gear with a battery option ;-)
I can think i can fix the solartron Problem if I can find a service
manual.
But now I can not even check the powersupply voltages because I do not
know
them. Filtercaps are good.
Fred
Fred,
What happens to the 10 volt position of the Fluke 731 when you attach
a 10
MegOhm input Voltmeter ?
I am sure you know that the 1 volt positions are just resistive
dividers
and any loading of any kind will drop their value.
Also, could you give details on what modifications you made to the
845AB ?
thanks,
Bill....WB6BNQ
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Joe,
I was within a couple of hundred yards of your 7081 this past week, if
it shipped to England without any delay! The Ametek/Solartron building
is just up the road from our pilot training center at Farnborough
Airport and I was there for meetings this past week. I had intended to
wander up the road and see if there was anyone left from the test
equipment group but time got away from me. The closest I got was driving
by the entrance to the industrial park.
While in England I did manage, through a friend, to pick up a set of
Solartron test leads with banana plugs, and he's going to see if he can
find his Kelvin clip set and probe set too. With the leads, good food,
good ale, good weather, and good company, it was a great trip. I
generally have at least one meeting a year at Farnborough and Gatwick
airports so I hope to eventually make it up the road to
Ametek/Solartron. Not sure if I want to take my 7081 in my luggage but I
may yet.
Steve
On Sun, Sep 25, 2011 at 11:31 AM, J. L. Trantham wrote:
Fred,
I have recently acquired a Solartron 7081 and have had a lot of fun
getting
to know the meter. In an effort to get it 'calibrated', I chased down
the
US branch of AMETEK, the company that now apparently owns Solartron.
I
shipped my meter to them yesterday and they will ship it to England
for
calibration, repair and alignment, as needed. The 7081 ceased
production in
1998 and full support ended in 2008 but it is still supported, 'best
endeavours'.
When I was on the phone with them this AM to give them my credit card
information, I asked if they still supported the 7061, remembering
this
thread. She said the 7061 is still on the list of supported
equipment. So,
worst case scenario, you could contact AMETEK and see what options
might
exist for your 7061.
Joe
-----Original Message-----
From: volt-nuts-bounces@febo.com [mailto:volt-nuts-bounces@febo.com]On
Behalf Of Fred Schneider
Sent: Thursday, September 29, 2011 5:35 PM
To: Discussion of precise voltage measurement
Subject: Re: [volt-nuts] Serious problems fluke 731A, 720 and
solartron
The voltage collapses. I have to measure how much but not just a few
uV.
More like 200 mV if I remember it right. I know it is a resitive
divider but
the influence on each other is getting worse if it is on 24/7,
another sign
something is wrong. The 1V influences akso the 10 V so you keep it
adjusting. If i set 10 V correct and then the 1 V's the 10 V is off
again.
The 845 AB had its nicads removed and they placed a big zener instead.
The
most important thing, I made a regulated and good filtered
powersupply. I
placed the pcb for that in the space the nicds were mounted.
I also have a HP frequency standard that had a batterybox. But they
were
dead and i did not needed that so now i build a trimble thunderbolt
into
that space and used the 100 KHz output of the HP for the 10 MHz. That
is the
advantage of having gear with a battery option ;-)
I can think i can fix the solartron Problem if I can find a service
manual.
But now I can not even check the powersupply voltages because I do not
know
them. Filtercaps are good.
Fred
Fred,
What happens to the 10 volt position of the Fluke 731 when you attach
a 10
MegOhm input Voltmeter ?
I am sure you know that the 1 volt positions are just resistive
dividers
and any loading of any kind will drop their value.
Also, could you give details on what modifications you made to the
845AB ?
thanks,
Bill....WB6BNQ
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and follow the instructions there.
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No virus found in this message.
Checked by AVG - www.avg.com
Version: 10.0.1410 / Virus Database: 1520/3922 - Release Date:
09/27/11
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A small update:
The 731A turned out to have a dirt problem. There was 200uV voltdrop
over the series resistor between opamp output en output bus. and that
was a dead end so there could be no current running. Only thing in
between was the switchdeck. After ultrasonic cleanig all was rock solid
and adjustments smooth. Set it at the right voltages about 6 hours ago
and normaly it had wandered of about 40uV or more but now it is still at
the same values.
Only thing I am in doubt about: Running on the battery it is perfect. On
230V stable too but not the same value and with a voltage difference if
I switch leads, so there is some stray fields making problems.
The 7061 is complete lineair in the 1V range but still not in the 10V
range. About 20 uV difference between 1 and 10V
Thanks for the advises.
asked a LT1027BH sample (to bad they do not sample the LTZ1000 and I did
not know they are allmost 50 dollars)
Fred
asked a LT1027BH sample (to bad they do not sample the LTZ1000 and I did
not know they are allmost 50 dollars)
Fred
Hello Fred,
from where can you still get a LT1027BH sample?
According to the datasheet they are no longer produced.
The BH-device would solve my problem with humidity.
For the LTZ1000: the 50 dollars for the reference
- the same amount (or even larger) for the 5 precision resistors.
with best regards
Andreas
Didier,
I will upload the 7061 manual later tonight.
Joe
-----Original Message-----
From: volt-nuts-bounces@febo.com [mailto:volt-nuts-bounces@febo.com]On
Behalf Of shalimr9@gmail.com
Sent: Wednesday, October 05, 2011 3:07 PM
To: Volt-Nuts
Subject: Re: [volt-nuts] Serious problems fluke 731A, 720 and solartron
Joe,
I am interested in hosting your manuals on my web site.
Let me know if that's ok with you.
Didier KO4BB
Sent from my BlackBerry Wireless thingy while I do other things...
-----Original Message-----
From: "J. L. Trantham" jltran@att.net
Sender: volt-nuts-bounces@febo.com
Date: Sun, 25 Sep 2011 19:41:25
To: Discussion of precise voltage measurementvolt-nuts@febo.com
Reply-To: Discussion of precise voltage measurement volt-nuts@febo.com
Subject: Re: [volt-nuts] Serious problems fluke 731A, 720 and solartron
Steve,
You must have something to do with aviation.
My meter just arrived in Oak Ridge yesterday. Hopefully, it will be on the
way to England later this week. Their turn around time estimate is 4 weeks.
Hopefully, I will have it back by first part of November.
I found the folks in Oak Ridge very friendly and helpful. The lady I spoke
with offered to try to find a manual for the 7081 but did not have any. She
did, though, have an operating manual for the 7061 that she sent me in .PDF
form. If anyone wants it, let me know. It is about 1 MB in size. I have
not looked to see if one is posted anywhere around the net or not.
Also, I found a complete set of used manuals for the 7081 (Operating Part I,
Operating Part II, and Service) at Manuals Plus and bought them. They have
yet to arrive.
I am anxious to see what they find in England and how it performs when it
gets back.
Joe
-----Original Message-----
From: volt-nuts-bounces@febo.com [mailto:volt-nuts-bounces@febo.com]On
Behalf Of Steve Krull
Sent: Tuesday, October 04, 2011 1:15 PM
To: volt-nuts@febo.com
Subject: Re: [volt-nuts] Serious problems fluke 731A, 720 and solartron
Joe,
I was within a couple of hundred yards of your 7081 this past week, if
it shipped to England without any delay! The Ametek/Solartron building
is just up the road from our pilot training center at Farnborough
Airport and I was there for meetings this past week. I had intended to
wander up the road and see if there was anyone left from the test
equipment group but time got away from me. The closest I got was driving
by the entrance to the industrial park.
While in England I did manage, through a friend, to pick up a set of
Solartron test leads with banana plugs, and he's going to see if he can
find his Kelvin clip set and probe set too. With the leads, good food,
good ale, good weather, and good company, it was a great trip. I
generally have at least one meeting a year at Farnborough and Gatwick
airports so I hope to eventually make it up the road to
Ametek/Solartron. Not sure if I want to take my 7081 in my luggage but I
may yet.
Steve
On Sun, Sep 25, 2011 at 11:31 AM, J. L. Trantham wrote:
Fred,
I have recently acquired a Solartron 7081 and have had a lot of fun
getting
to know the meter. In an effort to get it 'calibrated', I chased down
the
US branch of AMETEK, the company that now apparently owns Solartron.
I
shipped my meter to them yesterday and they will ship it to England
for
calibration, repair and alignment, as needed. The 7081 ceased
production in
1998 and full support ended in 2008 but it is still supported, 'best
endeavours'.
When I was on the phone with them this AM to give them my credit card
information, I asked if they still supported the 7061, remembering
this
thread. She said the 7061 is still on the list of supported
equipment. So,
worst case scenario, you could contact AMETEK and see what options
might
exist for your 7061.
Joe
-----Original Message-----
From: volt-nuts-bounces@febo.com [mailto:volt-nuts-bounces@febo.com]On
Behalf Of Fred Schneider
Sent: Thursday, September 29, 2011 5:35 PM
To: Discussion of precise voltage measurement
Subject: Re: [volt-nuts] Serious problems fluke 731A, 720 and
solartron
The voltage collapses. I have to measure how much but not just a few
uV.
More like 200 mV if I remember it right. I know it is a resitive
divider but
the influence on each other is getting worse if it is on 24/7,
another sign
something is wrong. The 1V influences akso the 10 V so you keep it
adjusting. If i set 10 V correct and then the 1 V's the 10 V is off
again.
The 845 AB had its nicads removed and they placed a big zener instead.
The
most important thing, I made a regulated and good filtered
powersupply. I
placed the pcb for that in the space the nicds were mounted.
I also have a HP frequency standard that had a batterybox. But they
were
dead and i did not needed that so now i build a trimble thunderbolt
into
that space and used the 100 KHz output of the HP for the 10 MHz. That
is the
advantage of having gear with a battery option ;-)
I can think i can fix the solartron Problem if I can find a service
manual.
But now I can not even check the powersupply voltages because I do not
know
them. Filtercaps are good.
Fred
Fred,
What happens to the 10 volt position of the Fluke 731 when you attach
a 10
MegOhm input Voltmeter ?
I am sure you know that the 1 volt positions are just resistive
dividers
and any loading of any kind will drop their value.
Also, could you give details on what modifications you made to the
845AB ?
thanks,
Bill....WB6BNQ
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and follow the instructions there.
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To unsubscribe, go to
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and follow the instructions there.
No virus found in this message.
Checked by AVG - www.avg.com
Version: 10.0.1410 / Virus Database: 1520/3922 - Release Date:
09/27/11
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Hi, Joe!
This is the link to the full versions of the Operating Manual and Maintenance
(not Service!) Manual for Solartron 7081 http://www.ko4bb.com/cgi-bin/manuals.pl?dir=09)_Misc_Test_Equipment/Solartron
Mickle T.
Monday, September 26, 2011, 4:41:25 AM, you wrote:
JLT> Steve,
JLT> You must have something to do with aviation.
JLT> My meter just arrived in Oak Ridge yesterday. Hopefully, it will be on the
JLT> way to England later this week. Their turn around time estimate is 4 weeks.
JLT> Hopefully, I will have it back by first part of November.
JLT> I found the folks in Oak Ridge very friendly and helpful. The lady I spoke
JLT> with offered to try to find a manual for the 7081 but did not have any. She
JLT> did, though, have an operating manual for the 7061 that she sent me in .PDF
JLT> form. If anyone wants it, let me know. It is about 1 MB in size. I have
JLT> not looked to see if one is posted anywhere around the net or not.
JLT> Also, I found a complete set of used manuals for the 7081 (Operating Part I,
JLT> Operating Part II, and Service) at Manuals Plus and bought them. They have
JLT> yet to arrive.
JLT> I am anxious to see what they find in England and how it performs when it
JLT> gets back.
JLT> Joe
Mickle,
I have those from Didier's site. However, I have always preferred paper
manuals. It's just easier for me to use. So I found them at Manuals Plus
and bought them. They are on the way.
I also made an inquiry with Telford Electronics in England
(http://www.telford-electronics.co.uk/manual.php?alpha=s) and it turns out
they have original 7081 Operation Manual Part I (12.50), Operation Manual
Part II (17.50) and a 'very good copy' of the Service Manual (20.00) (all
the amounts are GBP) and they do PayPal. So, for anyone in Europe, they
might be a good source
Thanks,
Joe
-----Original Message-----
From: volt-nuts-bounces@febo.com [mailto:volt-nuts-bounces@febo.com] On
Behalf Of Ìèõàèë
Sent: Wednesday, October 05, 2011 1:03 AM
To: Discussion of precise voltage measurement
Subject: Re: [volt-nuts] Serious problems fluke 731A, 720 and solartron
Hi, Joe!
This is the link to the full versions of the Operating Manual and
Maintenance (not Service!) Manual for Solartron 7081
http://www.ko4bb.com/cgi-bin/manuals.pl?dir=09)_Misc_Test_Equipment/Solartro
n
Mickle T.
Monday, September 26, 2011, 4:41:25 AM, you wrote:
JLT> Steve,
JLT> You must have something to do with aviation.
JLT> My meter just arrived in Oak Ridge yesterday. Hopefully, it will
JLT> be on the way to England later this week. Their turn around time
JLT> estimate is 4 weeks. Hopefully, I will have it back by first part
JLT> of November.
JLT> I found the folks in Oak Ridge very friendly and helpful. The lady
JLT> I spoke with offered to try to find a manual for the 7081 but did
JLT> not have any. She did, though, have an operating manual for the
JLT> 7061 that she sent me in .PDF form. If anyone wants it, let me
JLT> know. It is about 1 MB in size. I have not looked to see if one
JLT> is posted anywhere around the net or not.
JLT> Also, I found a complete set of used manuals for the 7081
JLT> (Operating Part I, Operating Part II, and Service) at Manuals Plus
JLT> and bought them. They have yet to arrive.
JLT> I am anxious to see what they find in England and how it performs
JLT> when it gets back.
JLT> Joe
volt-nuts mailing list -- volt-nuts@febo.com
To unsubscribe, go to
https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts
and follow the instructions there.
Joe,
I am interested in hosting your manuals on my web site.
Let me know if that's ok with you.
Didier KO4BB
Sent from my BlackBerry Wireless thingy while I do other things...
-----Original Message-----
From: "J. L. Trantham" jltran@att.net
Sender: volt-nuts-bounces@febo.com
Date: Sun, 25 Sep 2011 19:41:25
To: Discussion of precise voltage measurementvolt-nuts@febo.com
Reply-To: Discussion of precise voltage measurement volt-nuts@febo.com
Subject: Re: [volt-nuts] Serious problems fluke 731A, 720 and solartron
Steve,
You must have something to do with aviation.
My meter just arrived in Oak Ridge yesterday. Hopefully, it will be on the
way to England later this week. Their turn around time estimate is 4 weeks.
Hopefully, I will have it back by first part of November.
I found the folks in Oak Ridge very friendly and helpful. The lady I spoke
with offered to try to find a manual for the 7081 but did not have any. She
did, though, have an operating manual for the 7061 that she sent me in .PDF
form. If anyone wants it, let me know. It is about 1 MB in size. I have
not looked to see if one is posted anywhere around the net or not.
Also, I found a complete set of used manuals for the 7081 (Operating Part I,
Operating Part II, and Service) at Manuals Plus and bought them. They have
yet to arrive.
I am anxious to see what they find in England and how it performs when it
gets back.
Joe
-----Original Message-----
From: volt-nuts-bounces@febo.com [mailto:volt-nuts-bounces@febo.com]On
Behalf Of Steve Krull
Sent: Tuesday, October 04, 2011 1:15 PM
To: volt-nuts@febo.com
Subject: Re: [volt-nuts] Serious problems fluke 731A, 720 and solartron
Joe,
I was within a couple of hundred yards of your 7081 this past week, if
it shipped to England without any delay! The Ametek/Solartron building
is just up the road from our pilot training center at Farnborough
Airport and I was there for meetings this past week. I had intended to
wander up the road and see if there was anyone left from the test
equipment group but time got away from me. The closest I got was driving
by the entrance to the industrial park.
While in England I did manage, through a friend, to pick up a set of
Solartron test leads with banana plugs, and he's going to see if he can
find his Kelvin clip set and probe set too. With the leads, good food,
good ale, good weather, and good company, it was a great trip. I
generally have at least one meeting a year at Farnborough and Gatwick
airports so I hope to eventually make it up the road to
Ametek/Solartron. Not sure if I want to take my 7081 in my luggage but I
may yet.
Steve
On Sun, Sep 25, 2011 at 11:31 AM, J. L. Trantham wrote:
Fred,
I have recently acquired a Solartron 7081 and have had a lot of fun
getting
to know the meter. In an effort to get it 'calibrated', I chased down
the
US branch of AMETEK, the company that now apparently owns Solartron.
I
shipped my meter to them yesterday and they will ship it to England
for
calibration, repair and alignment, as needed. The 7081 ceased
production in
1998 and full support ended in 2008 but it is still supported, 'best
endeavours'.
When I was on the phone with them this AM to give them my credit card
information, I asked if they still supported the 7061, remembering
this
thread. She said the 7061 is still on the list of supported
equipment. So,
worst case scenario, you could contact AMETEK and see what options
might
exist for your 7061.
Joe
-----Original Message-----
From: volt-nuts-bounces@febo.com [mailto:volt-nuts-bounces@febo.com]On
Behalf Of Fred Schneider
Sent: Thursday, September 29, 2011 5:35 PM
To: Discussion of precise voltage measurement
Subject: Re: [volt-nuts] Serious problems fluke 731A, 720 and
solartron
The voltage collapses. I have to measure how much but not just a few
uV.
More like 200 mV if I remember it right. I know it is a resitive
divider but
the influence on each other is getting worse if it is on 24/7,
another sign
something is wrong. The 1V influences akso the 10 V so you keep it
adjusting. If i set 10 V correct and then the 1 V's the 10 V is off
again.
The 845 AB had its nicads removed and they placed a big zener instead.
The
most important thing, I made a regulated and good filtered
powersupply. I
placed the pcb for that in the space the nicds were mounted.
I also have a HP frequency standard that had a batterybox. But they
were
dead and i did not needed that so now i build a trimble thunderbolt
into
that space and used the 100 KHz output of the HP for the 10 MHz. That
is the
advantage of having gear with a battery option ;-)
I can think i can fix the solartron Problem if I can find a service
manual.
But now I can not even check the powersupply voltages because I do not
know
them. Filtercaps are good.
Fred
Fred,
What happens to the 10 volt position of the Fluke 731 when you attach
a 10
MegOhm input Voltmeter ?
I am sure you know that the 1 volt positions are just resistive
dividers
and any loading of any kind will drop their value.
Also, could you give details on what modifications you made to the
845AB ?
thanks,
Bill....WB6BNQ
volt-nuts mailing list -- volt-nuts@febo.com
To unsubscribe, go to
and follow the instructions there.
volt-nuts mailing list -- volt-nuts@febo.com
To unsubscribe, go to
https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts
and follow the instructions there.
No virus found in this message.
Checked by AVG - www.avg.com
Version: 10.0.1410 / Virus Database: 1520/3922 - Release Date:
09/27/11
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Didier,
Just uploaded the 7061 Operating Manual.
Joe
-----Original Message-----
From: volt-nuts-bounces@febo.com [mailto:volt-nuts-bounces@febo.com] On
Behalf Of shalimr9@gmail.com
Sent: Wednesday, October 05, 2011 3:07 PM
To: Volt-Nuts
Subject: Re: [volt-nuts] Serious problems fluke 731A, 720 and solartron
Joe,
I am interested in hosting your manuals on my web site.
Let me know if that's ok with you.
Didier KO4BB
Sent from my BlackBerry Wireless thingy while I do other things...
-----Original Message-----
From: "J. L. Trantham" jltran@att.net
Sender: volt-nuts-bounces@febo.com
Date: Sun, 25 Sep 2011 19:41:25
To: Discussion of precise voltage measurementvolt-nuts@febo.com
Reply-To: Discussion of precise voltage measurement volt-nuts@febo.com
Subject: Re: [volt-nuts] Serious problems fluke 731A, 720 and solartron
Steve,
You must have something to do with aviation.
My meter just arrived in Oak Ridge yesterday. Hopefully, it will be on the
way to England later this week. Their turn around time estimate is 4 weeks.
Hopefully, I will have it back by first part of November.
I found the folks in Oak Ridge very friendly and helpful. The lady I spoke
with offered to try to find a manual for the 7081 but did not have any. She
did, though, have an operating manual for the 7061 that she sent me in .PDF
form. If anyone wants it, let me know. It is about 1 MB in size. I have
not looked to see if one is posted anywhere around the net or not.
Also, I found a complete set of used manuals for the 7081 (Operating Part I,
Operating Part II, and Service) at Manuals Plus and bought them. They have
yet to arrive.
I am anxious to see what they find in England and how it performs when it
gets back.
Joe
-----Original Message-----
From: volt-nuts-bounces@febo.com [mailto:volt-nuts-bounces@febo.com]On
Behalf Of Steve Krull
Sent: Tuesday, October 04, 2011 1:15 PM
To: volt-nuts@febo.com
Subject: Re: [volt-nuts] Serious problems fluke 731A, 720 and solartron
Joe,
I was within a couple of hundred yards of your 7081 this past week, if
it shipped to England without any delay! The Ametek/Solartron building
is just up the road from our pilot training center at Farnborough
Airport and I was there for meetings this past week. I had intended to
wander up the road and see if there was anyone left from the test
equipment group but time got away from me. The closest I got was driving
by the entrance to the industrial park.
While in England I did manage, through a friend, to pick up a set of
Solartron test leads with banana plugs, and he's going to see if he can
find his Kelvin clip set and probe set too. With the leads, good food,
good ale, good weather, and good company, it was a great trip. I
generally have at least one meeting a year at Farnborough and Gatwick
airports so I hope to eventually make it up the road to
Ametek/Solartron. Not sure if I want to take my 7081 in my luggage but I
may yet.
Steve
On Sun, Sep 25, 2011 at 11:31 AM, J. L. Trantham wrote:
Fred,
I have recently acquired a Solartron 7081 and have had a lot of fun
getting
to know the meter. In an effort to get it 'calibrated', I chased down
the
US branch of AMETEK, the company that now apparently owns Solartron.
I
shipped my meter to them yesterday and they will ship it to England
for
calibration, repair and alignment, as needed. The 7081 ceased
production in
1998 and full support ended in 2008 but it is still supported, 'best
endeavours'.
When I was on the phone with them this AM to give them my credit card
information, I asked if they still supported the 7061, remembering
this
thread. She said the 7061 is still on the list of supported
equipment. So,
worst case scenario, you could contact AMETEK and see what options
might
exist for your 7061.
Joe
-----Original Message-----
From: volt-nuts-bounces@febo.com [mailto:volt-nuts-bounces@febo.com]On
Behalf Of Fred Schneider
Sent: Thursday, September 29, 2011 5:35 PM
To: Discussion of precise voltage measurement
Subject: Re: [volt-nuts] Serious problems fluke 731A, 720 and
solartron
The voltage collapses. I have to measure how much but not just a few
uV.
More like 200 mV if I remember it right. I know it is a resitive
divider but
the influence on each other is getting worse if it is on 24/7,
another sign
something is wrong. The 1V influences akso the 10 V so you keep it
adjusting. If i set 10 V correct and then the 1 V's the 10 V is off
again.
The 845 AB had its nicads removed and they placed a big zener instead.
The
most important thing, I made a regulated and good filtered
powersupply. I
placed the pcb for that in the space the nicds were mounted.
I also have a HP frequency standard that had a batterybox. But they
were
dead and i did not needed that so now i build a trimble thunderbolt
into
that space and used the 100 KHz output of the HP for the 10 MHz. That
is the
advantage of having gear with a battery option ;-)
I can think i can fix the solartron Problem if I can find a service
manual.
But now I can not even check the powersupply voltages because I do not
know
them. Filtercaps are good.
Fred
Fred,
What happens to the 10 volt position of the Fluke 731 when you attach
a 10
MegOhm input Voltmeter ?
I am sure you know that the 1 volt positions are just resistive
dividers
and any loading of any kind will drop their value.
Also, could you give details on what modifications you made to the
845AB ?
thanks,
Bill....WB6BNQ
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Checked by AVG - www.avg.com
Version: 10.0.1410 / Virus Database: 1520/3922 - Release Date:
09/27/11
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Joe,
Yes, aviation it is. 34 years with one of the largest trainers of
corporate, commuter, private, and military pilots and mechanics, with
flight attendants thrown in for good measure. Unfortunately it involves
a lot of travel as I'm the interface with the aviation authorities
around the globe.
My 7081 is sitting on the bench warming up and I hope to do some
comparisons against the 3458A before I get called out of the country again.
I hope they provide a good report with the return of your meter. Let us
know how it turns out.
Best regards,
Steve
On 10/4/2011 9:53 PM, J. L. Trantham wrote:
Didier,
I will upload the 7061 manual later tonight.
Joe
-----Original Message-----
From: volt-nuts-bounces@febo.com [mailto:volt-nuts-bounces@febo.com]On
Behalf Of shalimr9@gmail.com
Sent: Wednesday, October 05, 2011 3:07 PM
To: Volt-Nuts
Subject: Re: [volt-nuts] Serious problems fluke 731A, 720 and solartron
Joe,
I am interested in hosting your manuals on my web site.
Let me know if that's ok with you.
Didier KO4BB
Sent from my BlackBerry Wireless thingy while I do other things...
-----Original Message-----
From: "J. L. Trantham"jltran@att.net
Sender: volt-nuts-bounces@febo.com
Date: Sun, 25 Sep 2011 19:41:25
To: Discussion of precise voltage measurementvolt-nuts@febo.com
Reply-To: Discussion of precise voltage measurementvolt-nuts@febo.com
Subject: Re: [volt-nuts] Serious problems fluke 731A, 720 and solartron
Steve,
You must have something to do with aviation.
My meter just arrived in Oak Ridge yesterday. Hopefully, it will be on the
way to England later this week. Their turn around time estimate is 4 weeks.
Hopefully, I will have it back by first part of November.
I found the folks in Oak Ridge very friendly and helpful. The lady I spoke
with offered to try to find a manual for the 7081 but did not have any. She
did, though, have an operating manual for the 7061 that she sent me in .PDF
form. If anyone wants it, let me know. It is about 1 MB in size. I have
not looked to see if one is posted anywhere around the net or not.
Also, I found a complete set of used manuals for the 7081 (Operating Part I,
Operating Part II, and Service) at Manuals Plus and bought them. They have
yet to arrive.
I am anxious to see what they find in England and how it performs when it
gets back.
Joe
-----Original Message-----
From: volt-nuts-bounces@febo.com [mailto:volt-nuts-bounces@febo.com]On
Behalf Of Steve Krull
Sent: Tuesday, October 04, 2011 1:15 PM
To: volt-nuts@febo.com
Subject: Re: [volt-nuts] Serious problems fluke 731A, 720 and solartron
Joe,
I was within a couple of hundred yards of your 7081 this past week, if
it shipped to England without any delay! The Ametek/Solartron building
is just up the road from our pilot training center at Farnborough
Airport and I was there for meetings this past week. I had intended to
wander up the road and see if there was anyone left from the test
equipment group but time got away from me. The closest I got was driving
by the entrance to the industrial park.
While in England I did manage, through a friend, to pick up a set of
Solartron test leads with banana plugs, and he's going to see if he can
find his Kelvin clip set and probe set too. With the leads, good food,
good ale, good weather, and good company, it was a great trip. I
generally have at least one meeting a year at Farnborough and Gatwick
airports so I hope to eventually make it up the road to
Ametek/Solartron. Not sure if I want to take my 7081 in my luggage but I
may yet.
Steve
On Sun, Sep 25, 2011 at 11:31 AM, J. L. Trantham wrote:
Fred,
I have recently acquired a Solartron 7081 and have had a lot of fun
getting
to know the meter. In an effort to get it 'calibrated', I chased down
the
US branch of AMETEK, the company that now apparently owns Solartron.
I
shipped my meter to them yesterday and they will ship it to England
for
calibration, repair and alignment, as needed. The 7081 ceased
production in
1998 and full support ended in 2008 but it is still supported, 'best
endeavours'.
When I was on the phone with them this AM to give them my credit card
information, I asked if they still supported the 7061, remembering
this
thread. She said the 7061 is still on the list of supported
equipment. So,
worst case scenario, you could contact AMETEK and see what options
might
exist for your 7061.
Joe
-----Original Message-----
From: volt-nuts-bounces@febo.com [mailto:volt-nuts-bounces@febo.com]On
Behalf Of Fred Schneider
Sent: Thursday, September 29, 2011 5:35 PM
To: Discussion of precise voltage measurement
Subject: Re: [volt-nuts] Serious problems fluke 731A, 720 and
solartron
The voltage collapses. I have to measure how much but not just a few
uV.
More like 200 mV if I remember it right. I know it is a resitive
divider but
the influence on each other is getting worse if it is on 24/7,
another sign
something is wrong. The 1V influences akso the 10 V so you keep it
adjusting. If i set 10 V correct and then the 1 V's the 10 V is off
again.
The 845 AB had its nicads removed and they placed a big zener instead.
The
most important thing, I made a regulated and good filtered
powersupply. I
placed the pcb for that in the space the nicds were mounted.
I also have a HP frequency standard that had a batterybox. But they
were
dead and i did not needed that so now i build a trimble thunderbolt
into
that space and used the 100 KHz output of the HP for the 10 MHz. That
is the
advantage of having gear with a battery option ;-)
I can think i can fix the solartron Problem if I can find a service
manual.
But now I can not even check the powersupply voltages because I do not
know
them. Filtercaps are good.
Fred
Fred,
What happens to the 10 volt position of the Fluke 731 when you attach
a 10
MegOhm input Voltmeter ?
I am sure you know that the 1 volt positions are just resistive
dividers
and any loading of any kind will drop their value.
Also, could you give details on what modifications you made to the
845AB ?
thanks,
Bill....WB6BNQ
volt-nuts mailing list -- volt-nuts@febo.com
To unsubscribe, go to
and follow the instructions there.
volt-nuts mailing list -- volt-nuts@febo.com
To unsubscribe, go to
https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts
and follow the instructions there.
No virus found in this message.
Checked by AVG - www.avg.com
Version: 10.0.1410 / Virus Database: 1520/3922 - Release Date:
09/27/11
volt-nuts mailing list -- volt-nuts@febo.com
To unsubscribe, go to
https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts
and follow the instructions there.
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