On Apr 4, 2019, at 05:46, wallydoc via Groups.Io <wallydoc@...> wrote:
Just unzip and put it on a PCMCIA or CF card and boot the e7495
¡°Put it¡± as in make a FAT32 file system on the card and load the files on it? Gr¨¹?e, Carsten
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Re: HP 8720D - Debugging story
Here is some CPU fan information. The same processor board is used in the 8720ES where the fan is:
SUNON
KDE0504PEB2-8
5V dc / 0.4W
The fan and heat sink on the 8720D may be different, so this information may or may not not apply to your instrument.
Vladan
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Let us hope this file is not too big
This is the entire Full625 upgrade with the freq/time GPS patch already done
Just unzip and put it on a PCMCIA or CF card and boot the e7495
If anyone tries this please tell me if they have any problems
It worked just fine for me
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Re: HP 70590A Information wanted part of HP 70000 / MMS
I believe it is supported in conjunction with a 70900A.
I won¡¯t have access to a large-format scanner for a month or so, so I can¡¯t scan the schematics. But I have scanned and will send you the module manual via direct e-mail.
Thanks,
David Slik VE7FIM
On Wed, Apr 3, 2019 at 3:09 AM Paul Bicknell < paul@...> wrote:
Hi Dave
?
Thank you for your E mail from other E
mails it appears this item is not supported by the normal 70900 local oscillators
?
So only fit to stripe down for parts
?
Could you post the clip on a site? either
this one or the? HP 700000 site alternatively send it to me and I will post it
for you
?
Regards Paul Bicknell
?
I have the service manual and the CLIP for this module. Let me know if
you have any specific questions.
?
On Mon, Apr 1, 2019 at 12:54 PM Paul Bicknell <paul@...> wrote:
Hi
I totally agree with you value is in
The rear connector and any relay it might have? ??20 max
-----Original Message-----
From: [email protected]
[mailto:[email protected]]
On Behalf Of jfphp via
Groups.Io
Sent: 01 April 2019 11:37
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] HP 70590A Information wanted
part of HP 70000 / MMS
The 70590A is useless, except you have the military softwares from Air Force
or Navy dedicated to some gear (F18...) but they need a lot of non HP plug
ins (Comstron, Tern Technology...) under ITAR regulations. It is not used by
the various MMS cal and repair softwares. It? is 1? worth. You can only
dismantle it and get the rear connector as te first step to build an
extender (not easy !)..
--------------------------------------------
On Mon, 4/1/19, Paul Bicknell <paul@...> wrote:
?Subject: Re: [HP-Agilent-Keysight-equipment] HP 70590A Information wanted
part of HP 70000 / MMS
?To: [email protected]
?Date: Monday, April 1, 2019, 12:35 AM
?Hi I have spoken to the UK
?supplier I am due to visit him this week but
?I don¡¯t think he believed me
?when I told him I had only found 7 independent
?users of? HP 70000 equipment in the UK and
?that a lot? of people stay away
?from it as
?they do not understand how it all slots together
?The problem is a lot look at
?the equipment rate book and assume that is the
?price
?Still
?looking for? Receiver personality software
?-----Original
?Message-----
?From: [email protected]
?[mailto:[email protected]]
?On Behalf Of Harvey White
?Sent: 31 March
?2019 22:59
?To: [email protected]
?Subject: Re: [HP-Agilent-Keysight-equipment] HP
?70590A Information wanted
?part of HP 70000 /
?MMS
?On Sun, 31 Mar 2019
?00:31:55 -0700, you wrote:
?>Hi Paul,
?>
?>"The HP 70590A Options H69 and H72
?TMAs (Test Module Adapters) are MATE
?modules
?for HP 70000 Series spectrum analyzers. The modules
?translate CIIL
?(control intermediate
?interface language) into the HP 70000 Series native
?code. Option H69 modules provide a calibration
?switch signal at the rear
?panel. Option H72
?modules switch the RF and Calibrator signals to the
?analyzer's RF input."
?>
?>See
?>
?>I'm guessing you
?are wondering why a UK
eBay seller thinks he might get up
?to ?1000 for one!
?Does anyone still use MATE?? I worked on a
?runner up to that program a
?long while
?ago... ("our" proposal wasn't accepted)....
?Did some 488 bus programming
?using a TMS9914 controller run by an
?8088.
?Programmed in PLM-86.
?Don't really know where it went, may have
?been a wildly popular
?standard at the
?time.
?Historical note:
?The US DOD was getting tired
?of all the different instruments used in
?depot level (not flightline, since most of that
?was very custom...)
?speaking a different
?language, per the manufacturer....
?So they had a competition to see who could come
?up with a decent
?language (and it had a
?whole lot of "human factors" concepts thrown
?in, since it was somehow supposed to interface
?to something portable,
?or at least,
?that's what I remember...
?The company I worked for at the time lost.?
?Never quite sure why,
?didn't really
?understand some of the "they expect us to do it this
?way
?so we will.... thinking"
?but the concept of CIIL was to
?be that all the instruments were to
?speak a
?common language, and that language was to be a replacement
?for
?the existing instrument languages.
?Lots of money was dumped into
?the concept.
?Harvey
?>
?>Regards,
?>Steve
?>
?>
?-----
?No virus found in this
?message.
?Checked by AVG -
?Version: 2016.0.8048 / Virus Database:
?4793/15884 - Release Date: 08/14/18
?Internal
?Virus Database is out of date.
-----
No virus found in this message.
Checked by AVG -
Version: 2016.0.8048 / Virus Database: 4793/15884 - Release Date: 08/14/18
Internal Virus Database is out of date.
No virus found in this message.
Checked by AVG -
Version: 2016.0.8048 / Virus Database: 4793/15884 - Release Date: 08/14/18
Internal Virus Database is out of date.
|
Re: My $25 "In Poor Shape" 3468A has arrived
My chinese Kelvin test leads finally arrived, and they look & feel very good and solid. As usual my 3468A almost reads zero altough still a bit negative when I short them out. But I am pretty sure this problem will be solved very soon once I get something that is already in the mail.
These cables took and extra week delay because of a post office mess-up on top of the several weeks it normally takes to get something from the far East. I am very glad I got these. Amazing build quality for only a bit under $9 and would highly recommend them to anyone.
https://www.ebay.com/itm/111839980450
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E7495 Full625 upgrade with time/freq patch
I have put together a zipped file from the current Full625 upgrade
I have applied the well known patch to the zipped 625 file to make the GPS freq/time feature work.
It goes on a PCMCIA or CF card used for updates to the E7495
If anyone wants a copy I would be happy to send one.
Wally KC9INK
|
Re: Schaffner explosions (Re: [HP-Agilent-Keysight-equipment] HP8657B Mains Filter Disaster)
I have a couple of HP 8443A tracking generators. I purchased a smoked unit for spares - the transformer had gone into meltdown.
When the display (nixie tube) on one of my tracking generators quit, I started troubleshooting it, until I laid my hand down on the transformer, and burned my hand. The high voltage rectifiers for the nixie tubes had shorted. The shorted winding drew enough current to toast the transformer, but not enough to blow the fuse. Fortunately I caught it before that transformer destroyed itself.
Perhaps they should have fused that winding.
Gary Appel
toggle quoted message
Show quoted text
-----Original Message----- From: Chuck Harris Sent: Wednesday, April 03, 2019 10:46 AM To: [email protected]Subject: Re: Schaffner explosions (Re: [HP-Agilent-Keysight-equipment] HP8657B Mains Filter Disaster) Would a properly sized fuse prevent a fire from happening if you fired up a hotplate, and placed it in contact with a curtain? This is a common misconception about fuses and fire protection. They are pretty good at preventing power cords, wall outlets, and house wiring, from burning, but do little for problems like the bad RIFA capacitors. The RIFA capacitors will quite happily light up the printed circuit board, while not blowing a reasonably sized fuse. I have seen them burn clean through a FR4 circuit board... If it had been G10, there would have been more than just smoke. I have seen power transformers that caught fire without blowing the fuse when the rectifier shorted. Fuses save the house wiring, and the power cords, but not much else is certain. -Chuck Harris
|
Re: Schaffner explosions (Re: [HP-Agilent-Keysight-equipment] HP8657B Mains Filter Disaster)
And if you¡¯re talking about HP equipment, we¡¯ve found the engineers at HP did a great job of designing circuits that happily protect the fuse.? Regards, ? Stephen Hanselman Datagate Systems, LLC 3107 North Deer Run Road #24 Carson City, Nevada, 89701 (775) 882-5117?office (775) 720-6020?mobile s.hanselman@...
a Service Disabled, Veteran Owned Small Business DISCLAIMER: This e-mail and any attachments are intended only for use by the addressee(s) named herein and may contain legally privileged and/or proprietary information. If you are not the intended recipient, any dissemination, distribution or copying of this e-mail and any attachments is strictly prohibited. If you have received this e-mail in error, please immediately notify me and permanently delete the original and all copies and printouts of this e-mail and any attachments.
toggle quoted message
Show quoted text
On Apr 3, 2019, at 13:46, Chuck Harris < cfharris@...> wrote: Would a properly sized fuse prevent a fire from happeningif you fired up a hotplate, and placed it in contact with acurtain?This is a common misconception about fuses and fire protection.They are pretty good at preventing power cords, wall outlets,and house wiring, from burning, but do little for problems likethe bad RIFA capacitors.The RIFA capacitors will quite happily light up the printed circuitboard, while not blowing a reasonably sized fuse. ?I have seen themburn clean through a FR4 circuit board... If it had been G10, therewould have been more than just smoke.I have seen power transformers that caught fire without blowing thefuse when the rectifier shorted.Fuses save the house wiring, and the power cords, but not muchelse is certain.-Chuck HarrisDave_G0WBX via Groups.Io wrote:So don¡¯t rush out replacing all your 250 V nominal equipment (which will
be almost all of your equipment), but do rush out to get rid of the
crazing 1980s' RIFA capacitors (inside a golden clear plastic blob with
lots of cracks) that we are talking about, even when they are inside a
Schaffner line filter.
------------------------------------------------------------------------
Cant help thinking that a power lead with a correctly rated fuse in the
plug will reduce the damage, and certainly the fire risk.
For the non UK readers, we have HRC fuse cartridges in our power lead
plugs, that go into the wall socket. ?Saves a lot of embarrassment
sometimes, unless you get it very wrong...
Might not stop the "Bang"! ?But sure reduces the fire risk.
Regards.
Dave B.
|
Re: HP 8720D - Debugging story
When the VNA boots it goes into Factory preset and shows only option 010. The serial number shown seems correct given the info on the back.
That's another sign that someone was messing with the analyzer. Keep that in mind as you proceed, it may give you clues if you run into other oddities. The manual will tell you how to register the hardware options. Once you do that, the menus will look right for your configuration. You should do that before you do any calibration work. The batteries in these instruments last a long time but, once exhausted, they die suddenly. The good news is that the battery only serves for instrument states and the clock. The rest is in the EEPROM. I would take the CPU fan off and look for any clues about the manufacturer and model. Then, find the replacement wherever you can. Keysight will either tell you they no longer sell the fan, or it will cost a fortune if they do. Later versions of this processor board have an inexpensive looking Sunon fan, held in place with a wire spring clip. I can get the Sunon P/N tomorrow, but I am not sure if the thing will attach properly to your vintage heat sink. I do recall having a fan which made noise only when the instrument was upside down (service position). Once I blew out all the dust from it, it got quiet again. Vladan
|
Re: HP 8720D - Debugging story
Hi Vladan,
I didn't get a chance for more tests today, but did put together a basic cal kit and ordered a replacement battery. The BR-2/3a that's installed still reads 3.068V, so is probably still reasonably healthy, but it's an easy change to do before sealing things back up and getting it calibrated. I'll be measuring my DIY calkit at the uni tomorrow and using the METAS VNA Tools and/or scikit-rf to generate calibration data and check out the performance (assuming nothing's horribly wrong).
When the VNA boots it goes into Factory preset and shows only option 010. The serial number shown seems correct given the info on the back. It seems like I may need to poke around to set the options I have hardware for.
I'd like to replace the CPU fan (it's rattling). Is the best shot there to email Keysight with the part number and hope?
Thanks,
Derek
|
Re: Schaffner explosions (Re: [HP-Agilent-Keysight-equipment] HP8657B Mains Filter Disaster)
Would a properly sized fuse prevent a fire from happening
if you fired up a hotplate, and placed it in contact with a
curtain?
This is a common misconception about fuses and fire protection.
They are pretty good at preventing power cords, wall outlets,
and house wiring, from burning, but do little for problems like
the bad RIFA capacitors.
The RIFA capacitors will quite happily light up the printed circuit
board, while not blowing a reasonably sized fuse. I have seen them
burn clean through a FR4 circuit board... If it had been G10, there
would have been more than just smoke.
I have seen power transformers that caught fire without blowing the
fuse when the rectifier shorted.
Fuses save the house wiring, and the power cords, but not much
else is certain.
-Chuck Harris
Dave_G0WBX via Groups.Io wrote:
toggle quoted message
Show quoted text
So don¡¯t rush out replacing all your 250 V nominal equipment (which will
be almost all of your equipment), but do rush out to get rid of the
crazing 1980s' RIFA capacitors (inside a golden clear plastic blob with
lots of cracks) that we are talking about, even when they are inside a
Schaffner line filter.
------------------------------------------------------------------------
Cant help thinking that a power lead with a correctly rated fuse in the
plug will reduce the damage, and certainly the fire risk.
For the non UK readers, we have HRC fuse cartridges in our power lead
plugs, that go into the wall socket. Saves a lot of embarrassment
sometimes, unless you get it very wrong...
Might not stop the "Bang"! But sure reduces the fire risk.
Regards.
Dave B.
|
Re: Schaffner explosions (Re: [HP-Agilent-Keysight-equipment] HP8657B Mains Filter Disaster)
So don¡¯t rush out replacing all your 250 V nominal equipment
(which will be almost all of your equipment), but do rush out to
get rid of the crazing 1980s' RIFA capacitors (inside a golden
clear plastic blob with lots of cracks) that we are talking about,
even when they are inside a Schaffner line filter.
Cant help thinking that a power lead with a correctly rated fuse
in the plug will reduce the damage, and certainly the fire risk.
For the non UK readers, we have HRC fuse cartridges in our power
lead plugs, that go into the wall socket.? Saves a lot of
embarrassment sometimes, unless you get it very wrong...
Might not stop the "Bang"!? But sure reduces the fire risk.
Regards.
Dave B.
--
Created on and sent from a Unix like PC running and using free and open source software:
|
Re: HP8657B Mains Filter Disaster
There is a worse
smell fortunately rarely encountered any more and that is of a
failed Selenium Bridge Rectifier.
Oh good grief
yes!?
Once
experienced, never ever forgotten!?? Much like the burnt out
transformer smell too...
Dave B
--
Created on and sent from a Unix like PC running and using free and open source software:
|
Re: Schaffner explosions (Re: [HP-Agilent-Keysight-equipment] HP8657B Mains Filter Disaster)
Hi
Should add, that in the USA if on 115VAC mains the main reservoir electrolytic could well be the reason for the smell.
With switch mode supplies, which the 8920B will be, on 230VAC it is normally the input filter capacitors that fail and on 115VAC it is the first stage electrolytic storage capacitors that fail.
The above is not written in stone.
73 George G6HIG ? ?
On Wednesday, April 3, 2019 7:57 PM, RFI-EMI-GUY <rhyolite@...> wrote:
Is this same part used in the HP8920B? I ask because my otherwise fine unit outgasses a mild chemical smell when turned on. I am in the US.
|
Re: Schaffner explosions (Re: [HP-Agilent-Keysight-equipment] HP8657B Mains Filter Disaster)
Hi
I have never worked on a HP8920B power supply, but I have worked on a HP8920A one. The A power supply did have mains input filtering and deteriorating capacitors could well be the reason for the smell.
If the B is similar to the A removing the power supply is not a simple task as you first have to remove the power switch plastic actuator assembly to avoid damage when removing the power supply.
73 George G6HIG
On Wednesday, April 3, 2019 7:57 PM, RFI-EMI-GUY <rhyolite@...> wrote:
Is this same part used in the HP8920B? I ask because my otherwise fine unit outgasses a mild chemical smell when turned on. I am in the US.
|
Re: Schaffner explosions (Re: [HP-Agilent-Keysight-equipment] HP8657B Mains Filter Disaster)
Is this same part used in the HP8920B? I ask because my otherwise fine unit outgasses a mild chemical smell when turned on. I am in the US.
|
Re: HP8657B Mains Filter Disaster
Is this same part used in the HP8920B? I ask because my otherwise fine unit outgasses a mild chemical smell when turned on
|
Re: S-parameter test sets: risks of hidden damage
It is pot luck but you can be careful. Look at the vendor and see if they sell other stuff with guarantees as tested. Then if this item says untested you can be suspicious. If the vendor sells everything as not working because they don't know how to test you may get lucky. Physical looks mean little unless they indicate tampering (covers missing, etc) The inputs can be easily blown by putting DC in and burning the tiny 50 ohm terminations on the saphire? substrates. They are not repairable by mere mortals. PeterB
On Wed, Apr 3, 2019 at 12:01 PM markhaun2000 < haunma@...> wrote: When looking to purchase something like a 85046a at auction, how concerned should I be about a unit's cosmetic condition, assuming it's being sold as-is?? How easy is it to damage the RF connectors, visibly or invisibly?? The test ports are part of $$$ integrated assemblies, right?? So not easily replaced.? Just wondering how much paranoia is justified, and whether outward signs of abuse or neglect (scuff marks, etc.) are a useful proxy for other, more serious damage.? Is this an item where a return policy or guarantee would be more worthwhile, versus other kinds of test equipment?
|
S-parameter test sets: risks of hidden damage
When looking to purchase something like a 85046a at auction, how concerned should I be about a unit's cosmetic condition, assuming it's being sold as-is?? How easy is it to damage the RF connectors, visibly or invisibly?? The test ports are part of $$$ integrated assemblies, right?? So not easily replaced.? Just wondering how much paranoia is justified, and whether outward signs of abuse or neglect (scuff marks, etc.) are a useful proxy for other, more serious damage.? Is this an item where a return policy or guarantee would be more worthwhile, versus other kinds of test equipment?
|
Schaffner explosions (Re: [HP-Agilent-Keysight-equipment] HP8657B Mains Filter Disaster)
On Apr 3, 2019, at 14:34, george edmonds via Groups.Io <G6HIG@...> wrote:
This last email contradicts itself,
Care to identify where? also it is not unusual in the UK for the mains voltage to be or exceed 250VAC. Sure, 230 V ¡À 10 % = 207 V..253 V. The UK tends to be at the upper end (historically ¡°240 V¡±). But when items such as line filters are qualified for a working voltage, tolerances are of course already in the calculation. A 250 V nominal line filter doesn¡¯t explode at 251 V. Or 253 V. These are RMS values anyway¡ Capacitors don¡¯t care that much about RMS values, and the actual peaks are very much dependent on power quality, so safety margins are copious. So don¡¯t rush out replacing all your 250 V nominal equipment (which will be almost all of your equipment), but do rush out to get rid of the crazing 1980s' RIFA capacitors (inside a golden clear plastic blob with lots of cracks) that we are talking about, even when they are inside a Schaffner line filter. Now, to make this a bit more on-topic, does anyone know a timeline when these capacitors stopped to be specified and built in by HP? I.e., how new does equipment have to be so you can be relaxed about this issue? Gr¨¹?e, Carsten
|
RFI-EMI-GUY