Re: HP 6012B volt zero and current regulation

Hi

In my experience most bench power supplies show a similar behaviour. ?At one time I suffered repeated damage to equipment that was powered from a bench supply, when checked with a storage scope it went to a high voltage on turn on before settling back to the set voltage.

I still think that for valid measurements you cannot use a light bulb, they are NOT a linear devices if you do an applied voltage plot against observed resistance, from a sixtey year old memory of an experiment they are square law devices

73 George G6HIG ??

On Monday, August 20, 2018 5:50 PM, "wilson2115@..." <wilson2115@...> wrote:

I refined my test...
Instead of ramping the voltage with the knob. I basically set the voltage to 20V and the amperage to 2 amps. I connected the voltmeter in series with the bulb and performed a dynamic load test by opening and closing the circuit by touching the probe lead of the voltmeter to the output of the power supply... I also have the Fluke voltmeter set to peak amperage measurement and these are the results that I found.

With the 6012B set to 20V and 2A, upon closing the circuit the peak amps are 4 amps but quickly settles to 2 amps
With the 6024A set to 20V and 2 A, upon closing the circuit the peaks amps are about 2.5 but quickly settles to 2 amps.

The important observation here is the 6012B settles back to 2 amps, it seems the settle time is longer and the deviation is larger than the 6024A. Although these are two completely different supplies. If anything I could be nit picking here on the 6012B for its regulation settle time and overshoot, which is why I wanted to see if someone else had a similar supply and could see if they could duplicate the same results to see if this is normal...

Thanks for the help

Re: HP 6012B volt zero and current regulation

#90654

I refined my test...
Instead of ramping the voltage with the knob. I basically set the voltage to 20V and the amperage to 2 amps. I connected the voltmeter in series with the bulb and performed a dynamic load test by opening and closing the circuit by touching the probe lead of the voltmeter to the output of the power supply... I also have the Fluke voltmeter set to peak amperage measurement and these are the results that I found.

With the 6012B set to 20V and 2A, upon closing the circuit the peak amps are 4 amps but quickly settles to 2 amps
With the 6024A set to 20V and 2 A, upon closing the circuit the peaks amps are about 2.5 but quickly settles to 2 amps.

The important observation here is the 6012B settles back to 2 amps, it seems the settle time is longer and the deviation is larger than the 6024A. Although these are two completely different supplies. If anything I could be nit picking here on the 6012B for its regulation settle time and overshoot, which is why I wanted to see if someone else had a similar supply and could see if they could duplicate the same results to see if this is normal...

Thanks for the help

Great move

#90653

Sincerely,

James L. Hudson
WA5JAT

Re: 8566B SA all PLLs unlocked

#90652

Hello Calvin,
did you check the 6 power resistors? It did happen to me that a broken one on A1A6 once killed an opamp in the IF/display unit.
best regards,
Peter

so glad to be here!

walter shawlee

#90651

many thanks to those that moved the group, I hope our new home proves to be a good one.
all the best,

walter (walter2 -at- sphere.bc.ca
sphere research corp.

Re: A huge thank you!

#90650

Thanks for the smooth move!

Show quoted text

On Mon, Aug 20, 2018 at 6:32 AM Keith Monahan via Groups.Io <keith=[email protected]> wrote:

Thanks indeed!

I guess there was no problem at all transferring messages?

I scraped the group awhile ago when I thought yahoo might disappear. No
jails, no throttling, no VPN required. It just worked. I think it was a
little slow, maybe overnight for 88K messages.

Glad to see you had no troubles!

Thanks again!
Keith

On 8/20/2018 9:08 AM, James Allen wrote:
> Ditto from me Dave!!!
>
> Jim
>

Re: migration test message

#90649

On Mon, 20 Aug 2018, f1chf wrote:

Loud and clear :)

hell just to check !
thanks---
*
*  KSI@home    KOI8 Net  < >  The impossible we do immediately.  *
*  Las Vegas   NV, USA   < >  Miracles require 24-hour notice.   *
*

Re: Welcome to [email protected]

#90648

very nice and smooth :-)
congratulations!

Re: A huge thank you!

#90647

Thanks indeed!

I guess there was no problem at all transferring messages?

I scraped the group awhile ago when I thought yahoo might disappear. No jails, no throttling, no VPN required. It just worked. I think it was a little slow, maybe overnight for 88K messages.

Glad to see you had no troubles!

Thanks again!
Keith

Show quoted text

On 8/20/2018 9:08 AM, James Allen wrote:
Ditto from me Dave!!!
Jim

Re: A huge thank you!

#90646

Can't imagine seeing too many thank you messages. Free at last!
Thanks Dave and others!

Raymond

Re: A huge thank you!

James Allen

#90645

Ditto from me Dave!!!

Jim

A huge thank you!

#90644

To Dave and everyone involved for a pretty seamless move to our new home!

The migration of Yahoo -> groups.io is now complete

Dr. David Kirkby from Kirkby Microwave Ltd

#90643

Hi all,
The transfer should be complete. If you have not taken a look, take a look of the homepage of the group at /g/HP-Agilent-Keysight-equipment I received the email (partiall copied below) from groups.io, saying what had happened, and what had not.

Dave

===
Hello,

The transfer of your Yahoo Group hp_agilent_equipment to your Groups.io group HP-Agilent-Keysight-equipment is complete.

We've transferred the following parts of your group:

Members
Messages
Photos
Files
Links
Databases

IMPORTANT: Yahoo Groups has been very unreliable lately. If you find that you are missing Photos, Files or Messages, it is because we were unable to export them due to problems with Yahoo Groups. Also, we do not transfer calendar events.

Here are some statistics:

Total Members Processed: 4619
Successfully Added: 4067
Bounced Members (Skipped): 431
Moderated Members: 0
Members on Digest: 682
Undisclosed Emails (Skipped): 15

The following email addresses were not added:
<snip list>

431 email addresses were not added because they were bouncing.

?

1396 photos were transferred.

486 files were transferred.

40 links were transferred. WARNING: Some links were not able to be transferred because of a bug in Yahoo's export system. You will need to manually review the links.

6 databases were transferred.

If you have any questions, please contact [email protected].

Cheers,
The Groups.io Team
===

Let me know of any problems. Dave

Re: HP8569B CRT Jitter.

#90642

All sorted, just the broken switches to address now.

Alan, GI0OTC?

Re: migration test message

#90641

+1 ;)

First topic ever on the group?

Have all the yahoo topics been copied to for searching the archives?

Virus-free.

2018-08-20 9:54 GMT+02:00 Leo Kroonenburg <castellcorunas@...>:

Show quoted text

Ok here

Re: OK ....

#90640

Works fine!

Thanks!

Re: Welcome to [email protected]

#90639

Excellent move Sir.

Nice move.

Dave B.

-- 
Created on and sent from a Unix like PC running and using free and open source software.
::

OK ....

#90638

开云体育

Hello?: tanks You .

?

Re: migration test message

#90637

Ok here

migration test message

#90636

开云体育

hell just to check !

thanks

?