[volt-nuts] Serious problems fluke 731A, 720 and solartron

Fri Oct 7 01:39:13 UTC 2011

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 at febo.com [mailto:volt-nuts-bounces at febo.com]On
> Behalf Of shalimr9 at 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 at att.net>
> Sender: volt-nuts-bounces at febo.com
> Date: Sun, 25 Sep 2011 19:41:25
> To: Discussion of precise voltage measurement<volt-nuts at febo.com>
> Reply-To: Discussion of precise voltage measurement<volt-nuts at 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 at febo.com [mailto:volt-nuts-bounces at febo.com]On
> Behalf Of Steve Krull
> Sent: Tuesday, October 04, 2011 1:15 PM
> To: volt-nuts at 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 at febo.com [mailto:volt-nuts-bounces at 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 at febo.com
>>> To unsubscribe, go to
>> https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts
>>> and follow the instructions there.
>> _______________________________________________
>> volt-nuts mailing list -- volt-nuts at 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 at febo.com
>> To unsubscribe, go to
>> https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts
>> and follow the instructions there.
> _______________________________________________
> volt-nuts mailing list -- volt-nuts at febo.com
> To unsubscribe, go to
> https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts
> and follow the instructions there.
>
>
> _______________________________________________
> volt-nuts mailing list -- volt-nuts at febo.com
> To unsubscribe, go to
> https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts
> and follow the instructions there.
> _______________________________________________
> volt-nuts mailing list -- volt-nuts at febo.com
> To unsubscribe, go to
> https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts
> and follow the instructions there.
>
>
> _______________________________________________
> volt-nuts mailing list -- volt-nuts at febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts
> and follow the instructions there.
>