Re: HP-Agilent-Keysight-equipment
Dr. David Kirkby from Kirkby Microwave Ltd
It has not completed yet.
Dave
|
HP-Agilent-Keysight-equipment
Completing the transfer from Yahoo to Groups.io
Mike - M0MLM
|
Re: HP8656A Signal Generator
Thank you George.
Ken?? M0KHW
On Sunday, 19 August 2018, 18:22, george edmonds via Groups.Io <G6HIG@...> wrote:
Hi Ken
This is the HP user group.
73 George G6HIG
On Sunday, August 19, 2018 5:46 PM, KEN WRIGHT via Groups.Io <ken.h.wright@...> wrote:
I have access to an HP8656A 0 - 999MHz signal Generator which has not been used for some time, it seems to power up all buttons function ok but there is no output on the front N Type or the BNC output on the rear panel. I have done the manual reset for Reverse Power Protection, still no output. On the rear there listed are some? HP - IB commands ? RO? RF OFF State, ? RI? RF ON State,?? RP? Reset Reverse Power Protection. Is it possible that the last user ha d used the RO command and turned off the output, after several months would this command still be valid? any means of checking if this has happened? if so can it turned on without having access to HP-IB?? or do I have a more fundamental problem?? I have spent a considerable amount of time on the internet but no solution, also been trying to find an HP user group but no luck. Any help/advise gratefully appreciated.
?
Ken Wright ? M0KHW? ?
__._,_.___
?
|
Re: HP 6012B volt zero and current regulation
I am using a fluke voltmeter to measure the current using the peak measurement, is that a reliable indication of regulation by voltmeter?
I had an idea. If anyone has a 6012B, maybe 6012A, or a 6032A. Perhaps through a power resistor or bulb, to simulate the results I am observing. Set the current to a specific value and then rapidly ramp up the voltage and observe the regulation effects. If we conclude that you observe similar results to me this is then typical, if not post your results so I can compare with mine. I assume the 6012A and 6032A are similarly designed power supplies?
I observe when setting 4 amps only the supply and the voltage quickly ramped there is a peak of 4.8 amps under a load from a bulb, precisely its a car headlight
I should add this is not critical but just a observation and I am comparing my results to others.
|
Re: HP 6012B volt zero and current regulation
Dr. David Kirkby from Kirkby Microwave Ltd
The test results from the HP 6024 supply revealed that when the current is limited to 4 amps with the same setup from the 6012B, ramping up the voltage to test the current regulation it immediately stops at 4 amps although I notice a slight blip in brightness from the bulb, but not as bright or as long as noticed on the 6012B. I am studying the manual but at least I confirmed there is no phenomenons occurring with my test setup.
I don't think you should equate brightness with current, as you have a non-linear device. I would personally be observing the current with a scope, not judging it by a lightbulb. A FET fed with a square wave generator would make a load that should allow you to see the step response.
--
Dr David Kirkby Ph.D C.Eng MIET
Kirkby Microwave Ltd
Registered office: Stokes Hall Lodge, Burnham Rd, Althorne, CHELMSFORD, Essex, CM3 6DT, United Kingdom.
Registered in England and Wales as company number 08914892
Tel 01621-680100 / +44 1621-680100
|
Re: HP 6012B volt zero and current regulation
The test results from the HP 6024 supply revealed that when the current is limited to 4 amps with the same setup from the 6012B, ramping up the voltage to test the current regulation it immediately stops at 4 amps although I notice a slight blip in brightness from the bulb, but not as bright or as long as noticed on the 6012B. I am studying the manual but at least I confirmed there is no phenomenons occurring with my test setup.
|
Re: HP 6012B volt zero and current regulation
I took a look at the for this supply, if I read correctly the regulation is within 10mA and 5mV, quite good.
I have a HP 6024A supply which I will try this test on.
|
I forgot to say - you should all get an email when the transfer is complete
should email everyone when the transfer is complete. -- Dr David Kirkby Ph.D C.Eng MIET
Kirkby Microwave Ltd
Registered office: Stokes Hall Lodge, Burnham Rd, Althorne, CHELMSFORD, Essex, CM3 6DT, United Kingdom.
Registered in England and Wales as company number 08914892
Tel 01621-680100 / +44 1621-680100
|
Re: HP 6012B volt zero and current regulation
Dr. David Kirkby from Kirkby Microwave Ltd
On Sun, 19 Aug 2018 at 22:45, george edmonds via Groups.Io <G6HIG= [email protected]> wrote: NO This is the typical behaviour of a light bulb,
73 George G6HIG
Sure a lightbulb draws more current when cold, but if I understand the original poster correctly, he has set a current limit of 4 A on the PSU, so one would not expect to be able to get 5 A from it, even with a dead short. Without a detailed looked at the specifications, it is hard to know what is normal and what is not.
There are some pretty beefy FETs around with a low on-resistantance, which could be driven with a function generator to quickly (or slowly) change the load resistance.
--
Dr David Kirkby Ph.D C.Eng MIET
Kirkby Microwave Ltd
Registered office: Stokes Hall Lodge, Burnham Rd, Althorne, CHELMSFORD, Essex, CM3 6DT, United Kingdom.
Registered in England and Wales as company number 08914892
Tel 01621-680100 / +44 1621-680100
|
Re: HP 6012B volt zero and current regulation
NO This is the typical behaviour of a light bulb,
73 George G6HIG
On Sunday, August 19, 2018 10:40 PM, "wilson2115@..." <wilson2115@...> wrote:
Hello, I had a account from yahoo groups agilent and I recently transferred over.
I have a HP 6012B which I successfully repaired the current potentiometer so no more issue with the supply going full 60 amps with the slightest turn of the knob.
However I have some minor calibration issues if anyone could assist. I notice the volts on the display will not go below 0.2-0.1 volts at the full counter clockwise position, it also reads the same on the voltmeter. I am studying the manual to see where those adjustments are.
Also, when I test the amperage control by using a light bulb and a voltmeter in parallel to measure the current, if I set the current to 4 amps and quickly ramp the voltage the current peaks at 5 amps briefly before going back down to 4 amps a fraction of a second later. Could this be a typical overshoot characteristic of this supply?
Thanks
|
HP 6012B volt zero and current regulation
Hello, I had a account from yahoo groups agilent and I recently transferred over.
I have a HP 6012B which I successfully repaired the current potentiometer so no more issue with the supply going full 60 amps with the slightest turn of the knob.
However I have some minor calibration issues if anyone could assist. I notice the volts on the display will not go below 0.2-0.1 volts at the full counter clockwise position, it also reads the same on the voltmeter. I am studying the manual to see where those adjustments are.
Also, when I test the amperage control by using a light bulb and a voltmeter in parallel to measure the current, if I set the current to 4 amps and quickly ramp the voltage the current peaks at 5 amps briefly before going back down to 4 amps a fraction of a second later. Could this be a typical overshoot characteristic of this supply?
Thanks
|
Transfer from Yahoo to groups.io is now in the queue.
Dr. David Kirkby from Kirkby Microwave Ltd
You may have seen this message on the Yahoo HP/Agilent list, but if not, I will put it here too. I have selected the "Give Go Ahead to Transfer" button with the following selected:
* Transfer Members
* Transfer Messages
* Transfer Photos
* Transfer Files
* Transfer Links
* Transfer Database
The message
"We are in process of transferring your group. Depending on Yahoo and demand, this may take several days. You will be notified by email when the transfer is completed."
It is worth noting the contents of a previous email from , which said:
"IMPORTANT: Yahoo Groups has been very unreliable lately. We will do our very best, but there is a good chance that we may not be able to transfer all of your messages, photos or files. We will tell you which ones we were not able to transfer. Also, the migration queue is several days long at this point. Please be patient as we work through the backlog of tranfer requests."
So I don't know how long this will take, and there's a good chance it will not work perfectly, but I will try to resolve any issues later. -- Dr David Kirkby Ph.D C.Eng MIET
Kirkby Microwave Ltd
Registered office: Stokes Hall Lodge, Burnham Rd, Althorne, CHELMSFORD, Essex, CM3 6DT, United Kingdom.
Registered in England and Wales as company number 08914892
Tel 01621-680100 / +44 1621-680100
|
Latest update of transfer to groups.io - I have hit "Give Go Ahead to Transfer"
There does not appear to bern any messages coming through for several hours, so I thought it wise to start the copy to .? I have selected the "Give Go Ahead to Transfer" button with the following selected:
* Transfer Members
* Transfer Messages
* Transfer Photos
* Transfer Files
* Transfer Links
* Transfer Database
The message
"We are in process of transferring your group. Depending on Yahoo and demand, this may take several days. You will be notified by email when the transfer is completed."
It is worth noting the contents of a previous email from , which said:
"IMPORTANT: Yahoo Groups has been very unreliable lately. We will do our very best, but there is a good chance that we may not be able to transfer all of your messages, photos or files. We will tell you which ones we were not able to transfer. Also, the migration queue is several days long at this point. Please be patient as we work through the backlog of tranfer requests."
So I don't know how long this will take, and there's a good chance it will not work perfectly, but I will try to resolve any issues later. If you want to use the services of , I suggest you subscribe yourself, as its anyone's guess how long it will take for your account to be copied to . Go to, read what it says, and follow the instructions. /g/HP-Agilent-Keysight-equipment-- Dr David Kirkby Ph.D C.Eng MIET
Kirkby Microwave Ltd
Registered office: Stokes Hall Lodge, Burnham Rd, Althorne, CHELMSFORD, Essex, CM3 6DT, United Kingdom.
Registered in England and Wales as company number 08914892
Tel 01621-680100 / +44 1621-680100
|
HP 4145B Software Revisions
Anyone know the differences between the 4145B software revisions 1.0 and 1.2? Also, between revision 1.2 and 1.3? - George
|
|
|
Well, I made it here now too.?
Daun
|
Re: HP8656A Signal Generator
Hi Ken
This is the HP user group.
73 George G6HIG
On Sunday, August 19, 2018 5:46 PM, KEN WRIGHT via Groups.Io <ken.h.wright@...> wrote:
I have access to an HP8656A 0 - 999MHz signal Generator which has not been used for some time, it seems to power up all buttons function ok but there is no output on the front N Type or the BNC output on the rear panel. I have done the manual reset for Reverse Power Protection, still no output. On the rear there listed are some? HP - IB commands ? RO? RF OFF State, ? RI? RF ON State,?? RP? Reset Reverse Power Protection. Is it possible that the last user ha d used the RO command and turned off the output, after several months would this command still be valid? any means of checking if this has happened? if so can it turned on without having access to HP-IB?? or do I have a more fundamental problem?? I have spent a considerable amount of time on the internet but no solution, also been trying to find an HP user group but no luck. Any help/advise gratefully appreciated.
?
Ken Wright ? M0KHW? ?
__._,_.___
?
|
I have access to an HP8656A 0 - 999MHz signal Generator which has not been used for some time, it seems to power up all buttons function ok but there is no output on the front N Type or the BNC output on the rear panel. I have done the manual reset for Reverse Power Protection, still no output. On the rear there listed are some? HP - IB commands ? RO? RF OFF State, ? RI? RF ON State,?? RP? Reset Reverse Power Protection. Is it possible that the last user ha d used the RO command and turned off the output, after several months would this command still be valid? any means of checking if this has happened? if so can it turned on without having access to HP-IB?? or do I have a more fundamental problem?? I have spent a considerable amount of time on the internet but no solution, also been trying to find an HP user group but no luck. Any help/advise gratefully appreciated.
?
Ken Wright ? M0KHW? ?
__._,_.___
?
|
Further information about the transfer to groups.io
At the minute, NOTHING has been copied from the HP/Agilent Yahoo group. All 95 member on /g/HP-Agilent-Keysight-equipment have subscribed themselves. Around 2 members are subscribing each hour now. I am in the position to start copying almost everything, including the email addresses of account holders, and all the data. I have NOT started this yet, for a good reason. I have put this group into 'moderation mode'. All posts will be moderated. Any attempt to start a new topic will be declined, but this gives me the option of permitting any post that may have taken some time to arrive, to appear on Yahoo.
Sometime between 21:00 GMT today (Sunday), and 09:00 GMT tomorrow (Monday) I will
1) Bounce all messages from here - nobody will be able to post.
2) Start the copy from Yahoo to
The copy process can take a week or more, and may not be 100% complete. During this time, accounts and posts will be slowly copied by , as Yahoo block any attempts to make massive downloads of data. During this time, your account may or may not be on .
That will guarantee your account exists. But otherwise, it should hopefully be copied over during the next week or so. If you create your account? yourself, when the copy comes, your account will not be copied.
By not commencing the copy immediately, it should allow the Yahoo messages to be completed, and a "clean" copy made. If the copy was started immediately, some messages that are held up in the system might never get to .
Dave?
-- Dr David Kirkby Ph.D C.Eng MIET
Kirkby Microwave Ltd
Registered office: Stokes Hall Lodge, Burnham Rd, Althorne, CHELMSFORD, Essex, CM3 6DT, United Kingdom.
Registered in England and Wales as company number 08914892
Tel 01621-680100 / +44 1621-680100
|
Where does one got looking for new feet for the back of a 8672A? I just unwrapped my recent eBay purchase and its missing 2 of them.
Unit seem to work and other than a broken off slide switch lever on the ALC selector I think I am a happy owner of a functional signal generator.
Thanks Dave VE7HR
|
