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- HP-Agilent-Keysight-Equipment
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HP8559A Display Chip
g0mjw
I an repairing an 8559A that I acquired recently, unfortunately the
LD120CJ ADC chip has filed, possibly also the LD121CJ as well. Does anyone have spares? I have tried the usual surplus outlets and none have any, apart from those with $250 minimum orders. I know how the circuit works and I will have to replace it if necessary, but a modern voltmeter would not look right. It has another fault with the gain level shifting on some bandwidth ranges - I assume this is the usual switch contact problem like I had on my 8558. Regards Mike |
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Re: plastic feet locking strip on HP equipment.
Alexander Whiplash
--- Mark <marks@...> wrote:
Can someone please advise me what the plastic strip--- Mark <marks@...> wrote: Can someone please advise me what the plastic stripOne description for it is "top frame plastic piece". By the early 90s it had become a slightly lighter color plastic than earlier. A part number is 5041-8802. You can buy them from www.agilent.com, but cost is rather high at $14. I need one myself, and I have no clue why these are so easily lost. Usually there is no need to remove them unless the front panel is coming out. AW ____________________________________________________________________________________ Any questions? Get answers on any topic at www.Answers.yahoo.com. Try it now. |
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Re: CRT part number in HP 85662 display section for 8566A, 8568B
Hi Guys,
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I have done this with my CR70, and the CRT in my HP8505A. It works very nicely. I pulled the socket off of the CRT, and used the universal adapter, which is a bunch of micrograbber clips, and connected to the filament, cathode, control grid, and the focus grid for the G2 connection. G2 needs to be the electrode that is closest to the control grid (G1). The filament voltage on the 8505 is some where around 4.5V, and is stated in the manual. As to the other settings, pick any O'scope tube, a 5UP1, should do. You will probably find that the emission is way low. Don't worry too much about that. HP is pretty liberal in what they need. When you are in the manual restore mode, you hold the button down until the beam current drops, and then starts to rise again. Read the manual, it helps. -Chuck Harris John Miles wrote: Hi, Mark -- |
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Re: CRT part number in HP 85662 display section for 8566A, 8568B
John Miles
Hi, Mark --
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You may find this page interesting: -- the procedure has been done on at least one other 85662A since I wrote it up, with good results. If you get the CR70 working, please post a detailed account of how you did it, and I'll update the page. Depending on what electrodes the CR70 needs to be connected to, the wires in the HV compartment are probably the easiest way to hook it up. There are a couple of different part numbers for the 85662A CRT, since it was produced in at least two completely-different physical form factors. You can search the Agilent site for the service manual .PDF (look for 85662-90086). -- john, KE5FX -----Original Message----- |
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CRT part number in HP 85662 display section for 8566A, 8568B
Mark
I have a 85662 with a weak tube.
I finally managed to obtain a Sencore CR70 off eBay. I mean I have bought 3 of the CR70 on eBay over the last 12 months, and the first 2 never turned up! Now cr70's aren't cheap, especially when you are trying to ship them to Australia. I am so over being ripped off by dodgy sellers that know it takes longer to ship surface than buyer protection lasts. Moral of the story, don't ship surface to Australia. Anyway, I digress ;) in all the documentation I have, I can't find the pinouts for the tube. However, I do believe I have an equivalent part number: 170xb31 Could someone verify this for me? Many thanks, Mark VK2HMC |
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plastic feet locking strip on HP equipment.
Mark
Can someone please advise me what the plastic strip along the top of
circa 1980's HP equipment is called? It usually covers the screws that hold the front panel on. It also enables other test equipment feet to lock into the groove. The strips come in a 3 different sizes, full size that fits 19" wide chassis, a half width and a quarter width. Why anyone would take these off and lose them is a mysery to me! I am trying to find some of these 'strips', any ideas? Best regards, Mark. |
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Re: HP 7090A
Thank's Erik I appreciated the information very much.
I m still a fan of the old measuring HP equipment:). regards ON1EV --- In hp_agilent_equipment@..., erik <elbicon@...> wrote: circuits. quote+-that is necessary .... did this with one pen before)pushbutton (upper right blue button) simultaneously |
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Re: HP 7090A
On Thursday 07 December 2006 21:15, on1ev wrote:
Hello ON1EV There is a demonstration plot function which test most of the circuits. quote+- - make sure there are six pens in the carousel (i do not think that is necessary .... did this with one pen before) - apply power and set paper size - load the paper - press the Left and Right cursor arrow controls and shift pushbutton (upper right blue button) simultaneously unquote a demonstration plot with 3 waveforms will be shown . This test will not test the I/O circuitry. rgds, Erik - > hello, I'm looking the way to make a self test on a HP 7090A measuring |
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Re: HP 70001 mainframe
Geoff Blake
On Wed, 6 Dec 2006, ericapple2004 wrote:
Hello HP specialists and others ,Many years back I had a Sun 2 (2/120?) server in the lab, that really took some beating. it was about 12" wide, 24" deep and 36" high, and fitted with (IIRC) thirteen 5" fans, six in the power supply alone. It was noisier than being in a tube train on the Circle Line! -- Geoff Blake G8GNZ located near Chelmsford, Essex, U.K. Please reply to: geoff (at) palaemon (dot) co (dot) uk Using Linux on Intel & Linux or NetBSD on Sun Sparc platforms Please avoid sending me Word or PowerPoint attachments. See <> ------------------------------------------------------------------------------ This E-mail and any attachment(s) are strictly confidential and is intended solely for the addressee(s). If you are not the intended recipient please notify <postmaster(at)palaemon.co.uk> and the sender by return and permanently delete the message. You may not disclose, forward or copy this E-mail or any of its attachments to any third party without the prior consent of the sender. ------------------------------------------------------------------------------ |
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hp 15 pin card extender
im looking for a 15 pin card extender
for trouble shooting a hp 310a wave analyzer its working but still has some "issues" and it would be nice to be able to scope the cards i fixed it so far by finding bad capacitors with a meter "some of the small lytics were shorted" and carefully tacking in some miniture lytics to replace some twistlocks that have high leakage current in the bridge drive circuit "active filter" does anyone have a pdf of the manual for a late production 310a?? |
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HP 70001 mainframe
Hello HP specialists and others ,
My 70001 mainframe has such powerfull fan's , (BEARINGS are OK!!!) that the noise equals my Nilfisk Hoover (Brand name's , suppose you all know what i want to point out) Never had an instrument in my lab that has such a noisy fan. Beeing designed for rack/industrial use, the noise is probably normal. I noticed earlier 70001 instruments had NTC's to reduce the fan voltage (and noise) , anybody has schematics or basic design that was used ? The printed circuit still has the unused space/circuit where the NTC have to be located , I can see place for 2 ntc and 2 resistors (one set for each fan ) and 1 in front probably for extra safety that used to be there in earlier design . The 70004 display mainframe that can be used together with the 70001 is designed very very silent ... Many thanks, Erik |
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Re: Workbench surface
Hi Steve,
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To see what you are dealing with, turn on your oscilloscope, set its sweep speed to 10ms/dividion, set its vertical deflection to 0.5 V/division, and with one hand, grab the tip of your scope probe. That signal on your screen is real, and has enough current to drive a 10 meg to ground load. Now, imagine what that signal would be if your load was 100 meg, or 1000 meg to ground. Oh, and it doesn't matter what kind of lighting you are using, this is stray coupling to the power line. If you use mains electricity, it is there. -Chuck Harris Steve wrote: Thanks Mike and others for the advice, it's most helpful and educational. |
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Spectrum HP 8564E (upgrade) + Tracking source HP 85645A
voilelec
Sorry my last message was mysteriously truncated!
HP has a Firmware Upgrade (08560-60090) for 856xE ; 844&nid=-536902966.536881691.02&id=475844 <; 5844&nid=-536902966.536881691.02&id=475844> From HP support: ---- Needed for last versions of TAM ---- Fixes FADC bug ---- Fixes SIG ID On/Off and zero span amplitude jump ---- Year 2000 bug fixed ---- Status part is UTG (no more kits) Did somebody have EEPROM files for this upgrade? My configuration is: Spectrum HP 8564E + Tracking source HP 85645A 920427 EPROM on tracking source HP 85645A 970326 EPROM on spectrum HP 8564E First draft page on 8564E: <> This configuration works well (you have to configure as 8563e in tracking, 64e not in menu) I have many documents and notices + clips for exchange, read: <> Thanks In advance - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Voile & Electronique : <> Christian Couderc Marseille - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - |
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Microwave Mixer
jfowler306
Hi all. A bit off the HP theme, however need some help. I have a Time
63132 rf (active) mixer. It also has an alt. part number of DXM602. The LO and RF appear to be in the 10-20GHz range. If anyone has, or can direct me to where I can find specs. on this unit, I would really appreciate it. Eddy W5WTN/K5IPA |
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Re: deskjet 895 cxi printer
Don Black
One stock fault in HP printers is the print head slide bar becoming sticky. That's the chrome rod about 1/4" dia that running across the printer. Try wiping it clean with a tissue, that usually clears the fault. It shows up as all kinds of errors.
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Don Black. Jerry Massengale wrote: Greeting, |
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Re: Workbench surface
At 10:30 AM 6/12/06, you wrote:
I didn't realize that fluorescent lighting could be a problem. In anyI forgot to mention that it was only a real problem because it was quite low over the bench and the cables to the lights wound around the back and side of the bench, plus they were the old inductor type ballast and the large metal housing might not have been well grounded. When a 20v max mosfet gate regularly gets 27v at 50hz it doesnt last long but all other ICs were ok, a drop in the mat resistor to 100k didnt upset any other handling and dropped the field voltage from 27 to around 2.5 I will take a look at 3M and other mats, both for the floor and theAh - I just checked my post, the '3m' later on referred to a 3 metre area of transition (miniumu) from an unsafe to the fully safe area. For me this did not need a 3M mat just an ordinary wool/cotton carpet which was treated with the same chemical women use when ironing to stop their dresses sticking to their panty hoses - it was *much* cheaper than the 3M or any other chemicals, I actually still have a Bokhara Afghan rug, cost about $600 in the olde days when these were being sold as "investments", still in one piece must have had it for over 20years now, more utilitarian than worth hanging on the wall for a seance ;) From what I recall, the chemical is just some ionic salt, perhaps even MgSO4 or maybe some mix which was very slightly hygroscopic, or at least had some lower resistance when dry at low humidity levels cant recall exactly. I dont use it anymore as my smallest lab is for my use only and if I ever have any very badly static sensitive devices on that 3M bench then my whole demeanor changes dramatically :P Cheers Mike 73, |
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Re: Workbench surface
Steve
Thanks Mike and others for the advice, it's most helpful and educational.
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I didn't realize that fluorescent lighting could be a problem. In any event, I'm not using that kind of lighting. I will take a look at 3M and other mats, both for the floor and the bench top. 73, Steve K8JQ Mike wrote: have been through this a couple of times in last 20 years, |
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Re: deskjet 895 cxi printer
John Miles
Good site for that type of issue is . They
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sell service kits for most HP and other models, at least for Laserjets. Pickup rollers seem to be a common trouble spot. -- john, KE5FX -----Original Message----- |
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