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HP-3421A Service Manual is required.
There is one HP-3421A that does not turn on (+15, -15, + 5V is dead). The measured value of C708 where oscillation is occurring inside the capacitor is 495(0.205). C708(25V, 470uF) was replaced. And when you turn on the power, +16.9V is measured in TP700, +7V in RT700, and +6.6V on top, regardless of S502(Switch). However, +15V, -15V, and +5V cannot be measured. I suspect the U702(LM393N, Dual Differential Comparator), but it is not easy to analyze because there is no circuit diagram. If the ¡°Wakeup Logic¡± on the left side of the figure can be related to S502, the problem is complicated, so I need a schematic. Please tell me where to buy the service manual schematic(pdf, jpg). |
Re: Jacks added to 6623A System PSU
On Sun, Apr 19, 2020 at 11:09 AM, Michael Dunn wrote:
Does anyone know a source for pre-made onesWell... I haven't seen (doesn't mean they don't exist)... but, I haven't seen the ones stamped out of sheet steel lately, and hardly the ones stamped out of brass ever. But Pamona makes what they call "Stackable Shorting Double Banana Plug" with the banana plugs centered at 0.75 inch... that fit my HP 6111A, et. al. power supplies. Jameco, and others sell them. See. Best regards. |
E4418B modification information for the stand by battery
¿ªÔÆÌåÓýHi all Can anyone help me with the modification information for the E4418B to stop the stand by battery from draining ? I know it exists as I had it a few months ago / last year but unable to find in my HP manuals Regards Paul ? ? ? |
Re: new File called App notes
Well written application notes are some of the best educational tools available; whether they are instrument specific or more general.
? I prize the General Radio, Boonton, Wiltron and Hewlett Packard app notes. They have been a source of a great deal of my practical education. Stuart K6YAZ Los Angeles, USA |
Re: Agilent 8753es Option 11 and TDR Measurements...
Burt,
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Good distance resolution on TDR usually requires wide bandwidth, so you might upset some folks with significant out of channel power on a live antenna. --John On Sun, Apr 19, 2020 at 07:43 AM, Burt K6OQK wrote: John, |
Re: new File called App notes
On 4/19/20 4:09 PM, Bill Perkins wrote:
????TRYING to d'load:I expect it's more legions of dramatically underpaid (but willing) people in India. File sent off-list. -Dave -- Dave McGuire, AK4HZ New Kensington, PA |
Re: new File called App notes
TRYING to d'load:
App Note 123 - Floating Measurements and Guarding from here: I get the attached screen shot ? Furthering Keysight's endless teases these days one can pull down from that same page the attached spreadsheet, promising much more info but w/o a single working link. Do they have a bunch 20-somethings chugging Red Bull doing this stuff anymore ? Bill @ PEARL, Inc. |
Re: new File called App notes
Bill Perkins
Hi Bill thank youYes, go right ahead; and use anything else you'll find in that directory if you go up a level or two. I've made the server's file structure accessible exactly so that people can dig around as I have so. much. stuff I'll spend the rest of my days putting html in front of it all. TO THE LIST ADMIN: How do I change my subscription e-mail address ? Hit me off list if pls. Regards PaulBest, Bill @ PEARL, Inc. |
Re: VXI documentation, was Re: [HP-Agilent-Keysight-equipment] new File called App notes
On 4/19/20 2:58 PM, Don Bitters via groups.io wrote:
Parts of the Agilent Technologies VXI business was sold to VXISome did, but not all. Many VXI modules are still currently sold by Keysight, including Slot 0 controllers, relay muxes, etc. -Dave -- Dave McGuire, AK4HZ New Kensington, PA |
Re: VXI documentation, was Re: [HP-Agilent-Keysight-equipment] new File called App notes
Parts of the Agilent Technologies VXI business was sold to VXI Technologies, just prior to the Agilent - Keysight split sometime? after 2003, so there may be info on their site about the Agilent VXI items.? I believe Keysight kept everything that pertained to RF, Microwave, Power measurement, DMM, O-scope technologies.? I think that most of the switching matrix items went with VXI Technologies. Don Bitters |
Re: new File called App notes
A worthy pursuit. B-)
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-Dave On 4/19/20 2:22 PM, Paul Bicknell wrote:
Hi Dave --
Dave McGuire, AK4HZ New Kensington, PA |
Re: new File called App notes
Hi Dave
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I think they actually do know what an Application note is They where just having me on Paul -----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Dave McGuire Sent: 19 April 2020 18:52 To: [email protected] Subject: Re: [HP-Agilent-Keysight-equipment] new File called App notes On 4/19/20 4:16 AM, Paul Bicknell wrote: Thank you for your input but I think the Dave's were having a laugh atNot really, no. While I will rarely pass up the opportunity to have a laugh at someone else's expense (I can't help it!) in this instance I was, and am still, honestly shocked that anyone involved with tech work, today or thirty years ago, wouldn't know what an app note is. -Dave -- Dave McGuire, AK4HZ New Kensington, PA ----- No virus found in this message. Checked by AVG - www.avg.com Version: 2016.0.8048 / Virus Database: 4793/15886 - Release Date: 08/14/18 Internal Virus Database is out of date. |
Re: Jacks added to 6623A System PSU
On 4/19/20 1:56 PM, Michael Dunn wrote:
I got a good deal on a 6623A triple system PSU last year, and finallyNice solution! -Dave -- Dave McGuire, AK4HZ New Kensington, PA |
Jacks added to 6623A System PSU
I got a good deal on a 6623A triple system PSU last year, and finally added binding posts to it (it only sports rear screw terminals as-is):
/g/HP-Agilent-Keysight-equipment/album?id=245498 Not the greatest model to use as a bench supply, but one makes do... All that remains is to make links to join the output & sense posts. I've ordered some sheet brass & aluminum. Does anyone know a source for pre-made ones? |
Re: new File called App notes
On 4/19/20 4:16 AM, Paul Bicknell wrote:
Thank you for your input but I think the Dave's were having a laugh atNot really, no. While I will rarely pass up the opportunity to have a laugh at someone else's expense (I can't help it!) in this instance I was, and am still, honestly shocked that anyone involved with tech work, today or thirty years ago, wouldn't know what an app note is. -Dave -- Dave McGuire, AK4HZ New Kensington, PA |
Re: new File called App notes
On 4/19/20 12:14 AM, Richard Knoppow wrote:
?? App notes mean Application notes. Publications that explained how toThey've never been restricted to being about how to use instruments. Many are about how to perform measurements, and other non-instrument-specific stuff. For example, the "bible" of that mysterious "guard" terminal on high-end voltmeters: AN123, "Floating Measurements and Guarding", from HP. App notes also come from component manufacturers...usually (but not always!) they are about applications for a specific component, but many many of them are much more general. There's practically an EE degree's worth of information distilled in the ones published by Linear Technology over the years, for example. ?? I don't mean to take this away from Dave but its an example to me ofUhh...this is a very current term. -Dave -- Dave McGuire, AK4HZ New Kensington, PA |
Re: new File called App notes
On 4/18/20 10:37 PM, Paul Bicknell wrote:
I have already had my leg pulled about calling them (App notes)It's fine English. They usually (but don't always) say "Application Note" at the top, but the whole engineering world calls them "app notes" today, as we have for decades. -Dave -- Dave McGuire, AK4HZ New Kensington, PA |
VXI documentation, was Re: [HP-Agilent-Keysight-equipment] new File called App notes
On 4/18/20 8:10 PM, Andy ZL3AG via groups.io wrote:
ANYTHING that is on the Keysight website and nowhere else needs to beYes, agreed 100%. These days, web sites are controlled by suits, and suits are not to be trusted with anything of value. I've being trying to hunt down VXI stuff and it comes up on the Google,I use VXI a lot, and I have tons of VXI documentation in PDF format for lots of different things. Email me if you're looking for something specific, or if you want to sync up documentation collections in some way. -Dave -- Dave McGuire, AK4HZ New Kensington, PA |
Re: new File called App notes
Hi bill thank you
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It appears there are possibly 3 sites with application notes on just requires the contents of each site for a listing off the application notes it has Then perhaps we can fill in the missing ones to each site So I assume we can use your list to help fill in any missing ones for the benefit of all Regards Paul -----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Bill Perkins Sent: 19 April 2020 16:28 To: [email protected] Subject: Re: [HP-Agilent-Keysight-equipment] new File called App notes There's a 100MB .zip you are welcome to pull down and re-up from your side: /HP_App_Notes_Hbooks_Seminars/HP_App_Notes_Hbooks_Seminars.zip Bill @ PEARL, Inc. > > Hi all > > > > Recently I have been looking at app notes for equipment and realised we do > > not have a collection on the site > > > > So In the File section I have made a File called App notes** > > > > Could I ask you all to help with putting any App notes you have in PDF > > format into the new file > > > > Best Regards Paul ----- No virus found in this message. Checked by AVG - www.avg.com Version: 2016.0.8048 / Virus Database: 4793/15886 - Release Date: 08/14/18 Internal Virus Database is out of date. |