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The following items have been added to the Files area of the [email protected] group. /All HP, Agilent and Keysight instruments in folders by part numbers/5000 to 5999/HP 5334A Universal Counter/HP_5334A_ROM_05334-80011.zip By: BI4LBK <chrispotma@...>

As many may remember, Walter Shawlee II passed away September of 2023. Since that time, his wife Susan, and children, have been busying themselves with the task of liquidating much of the electronic goodness that Sphere Research had accumulated. Susan intends to continue to make their collection of slide rules, nixie tubes and various other items available. Additionally, she is continuing in her effort to find homes for the remaining equipment. Please do visit Sphere’s site and help. Sphere’s inventory of Tektronix and HP parts has found a new home with us. We have the beginnings of a website (tekandhpparts.com), with the intention of continuing to make these parts available to the Tek and HP enthusiast community. A bit about us: 1) The goal of the website is to continue to make Sphere’s inventory available to the people like us that enjoy collecting, repairing and making use of these amazing examples of engineering and manufacturing. 2) A secondary goal is to “pay back” our retirement account of the funds used to buy the parts. It is truly secondary, and may never happen, but who knows? 3) We are retired, have three children, farm 20 acres of grass hay, tend to cows, sheep, horses and chickens, and have FAR too many hobbies and other responsibilities to have taken on another, but here we are…. 4) Our website is an amateur work in progress. Please read the home page posts for information on the site and on our progress. Tek items will be posted first, followed by HP and then “other” semiconductors and who knows what else. There is much awaiting inventorying, so if you don’t see the part you are interested in, please contact us directly (tom@...) and we will let you know if we have it. Also, items showing zero inventory are just awaiting an accurate count, so please inquire if you need something showing zero inventory. Look for announcements on the homepage as we complete the inventorying and pricing of each group of parts. Please be patient as we get the website, inventory and pricing figured out. Feedback is, as they say, a gift, so please share any constructive advice or suggestions for the site that you may have. The suggestion "You should have your head examined" has already been given! :) We can’t ever hope to duplicate the knowledge that Walter possessed, but will do our best to provide you with the right parts for your project. We look forward to getting to know our new customers, and will work hard to earn your trust. Thank you, Tom and Darla Norman

Looking to purchase one. It shows no display on the screen which I can deal with, but I can't seem to find in the manual anything about the bottom Instr Check lights. The left one stays on. Any knowledge about what causes this? Thank you, Scott

Hi, I'm currently repairing an early HP branded model E3611A DC Power Supply to give to a friend, but the schematic from the usual online sources is for later models that differ in some parts (notably around the area I am trying to repair....) Does anyone have a copy of the service manual for early HP units they can share? I just need the schematic and parts listing in particular. Thanks! Jared

I am seeking replacements or substitutes for these caps: C10 HP p/n 0180-1852 x2 C14 HP p/n 0180-1888 x2 C20 HP p/n 0180-1851 x2 I have tried a variety of cobbled together solutions and they have not worked. I do not want to scrap this device but I am out of ideas. Thanks -- Joe White KW4YW

The following items have been added to the Files area of the [email protected] group. /All HP, Agilent and Keysight instruments in folders by part numbers/3000 to 3999/E3610A, 11A, 12A/E3610A-07 - eliminate oscillation when the output voltage and or load conditions are changed.pdf.pdf /All HP, Agilent and Keysight instruments in folders by part numbers/3000 to 3999/E3610A, 11A, 12A/E3610A-01 - The binding posts have defective plating.pdf /All HP, Agilent and Keysight instruments in folders by part numbers/3000 to 3999/E3610A, 11A, 12A/E3610A-02 - voltage transient above the output setting during turn-off.pdf /All HP, Agilent and Keysight instruments in folders by part numbers/3000 to 3999/E3610A, 11A, 12A/E3610A-03 - sporadic overshoot that is caused by an intermittent voltage control.pdf /All HP, Agilent and Keysight instruments in folders by part numbers/3000 to 3999/E3610A, 11A, 12A/E3610A-04 - eliminate oscillation from the power supply's output.pdf By: Philip Freidin <philip@...> Description: Service notes for E3610

Hi to all, I am looking for a modification for the following PSU to ioncrease the voltage to 13.8V , any ideas? HP DPS-1400CB A PWS 1400W HSTNS-PD43 754383-001 DL360 G9 DL380 G9 LFF Thank you all Nick SV1VS

I need a replacement or substitute for A1C19 (0180-2991), Sprague 67D398H020JL5A. Mine let go in spectacular fashion, magic smoke, magic goo, pungent atmosphere. Thanks -- Joe White KW4YW

(Bear with me, I’m still learning how to use this platform) I’m primarily interested in obtaining logarithmic sweeps/bode plots while using my 8556A audio frequency plugin and 8570A Storage Normalizer specifically for audio amp, loudspeaker, and crossover characterizations. Its native linear sweep/plotting makes it incredibly difficult to distinguish things at the low end of the frequency range; effectively prohibiting one from gathering useful data from a single 20Hz - 20KHz pass (I instead have to break up the single measurement into multiple, across smaller ranges… a very inconvenient endeavor). Did HP ever publish any sort of instructions or app notes that address this? Did they produce any accessories/equipment specific for this? I understand there were logarithmic converters available for XY plotters, but I’ve yet to get any confirmation as to whether or not they would be best applicable to my specific needs, and/or how they would work in conjunction with the 8570 normalizer. Thoughts? Recommendations? Thanks-

Hello, I recently purchased an HP3582A, and I'm encountering a problem with channel B. It's constantly in overload and always displays a saturated spectral line, even with nothing connected. Channel A seems to be working fine. To diagnose the issue, I swapped the cards for channels A and B, and I found that both cards function correctly, but only when plugged into slot channel A. I also swapped 4 digital filter components , but the problem persists. Is there anyone who could guide my investigation? Thanks Patrick

The Internet Archive has what appears to be a snapshot of ftp.agilent.com from 2014. Link is https://archive.org/download/ftp.agilent.com. The file is rather large (317GB) and an attempt to download failed after approximately 220GB. I don't want to blow my monthly data plan and thus decided to wait a little before attempting it again. The Internet Archive allows the download of individual files from the tar-ball, but I'd rather have a replica of the whole site to browse and explore locally. Has anyone successfully downloaded this tar file? Don't want to waste time and bandwidth if the file is known to have issues. Thank you, Wolfgang KI7PFX

I have approximately twelve plastic storage bins (22" x 15" x 12") of test and measurement related manuals that are surplus to my needs. The vast majority of them are HP/Agilent manuals (e.g. scopes, analyzers, generators, and many, many more), and are predominantly operating and service manuals. All are original hardcopy in original binders, and are in very good to excellent condition. There is also some software on 3-1/2" floppy disks. I'd like them to go to someone who can use them, and hopefully make scans and copies of them for the benefit of all. I do not want to have to pack them and mail them, so I'd very much prefer that they be picked up here in San Diego. I'm also willing to drive a reasonable distance to meet whoever wants to take them all. Any interest? Thanks, Stan

Hi all I have managed to find a HP 432B unfortunately the digital display is shot Has anyone got a spare working display alternatively a non worker? Also has any one successfully repaired a display Paul located UK

A question on the HP E6380A - 8935 test set. Does that test set allow you to test 1.2 GHz analog FM equipment? The set mentions the range from 1.7 to 2.0 GHz and then 400 kHz to 1 GHz from what I read. So is there some kind of gap where say you cannot test a radio for TX/RX at 1288 MHz? Thanks - Sig

I have found the installation image for HP Basic for Windows 6.33 on the internet archive From the images in the archive it looks as though there were a number of printed manuals that were supplied with the package I am especially interested in the Installing and Using and User's manual Does anyone have access to these documents in .pdf from? Peter

Hello All, Need help on HP-8903A, it took more than 2 years fighting, 1.it came with an ERR=18 after checked, -15V rail had bad regulator A11U2 and shorted filter cap C02, an easy fix. 2 after few days playing, system suddenly did not respond to keyboard. found A8 CPU board , the most CPU pins were black and rusted, easily crashed when touch, by soldering IC directly to another CPU socket with fly wires. then seat back to original socket, it run perfectly again. 3. another few days running testing with GPIB program, thank you very much for great work from Mr. Pete Millett. Software did control the measurement and actions, however the voltage reading something wrong, (not taking notes clearly for this issue) through the block diagram, the RMS voltage measurement related with A4 board, follow troubleshooting sheet A4 1-3, confirmed no DC checked on A4TP1, A4U5 was suspicious. Replaced with a new LM301AH, it run good again. 4.few days later, the THD reading getting high just after power On, after 20mins warm up, the THD reading back to normal. after long chasing/measurement on board, and took one lead out to measure film caps. finally found out C45 3uf/100V reading is good, but leaking. New film cap was replaced, it read quick again. Rainy day always after sunny days.. 5.One more issue recognized, when OSC. output lower then 0.5865V, the voltage reading and THD was not stable, up/down slowly. it took long time verify this issue, Since not every time encountered, but says > 70% happened. I can't locate the issue either from Osc. board A6 nor Atten. Board A5, Until I got second unit in very reasonable low price, luckily, A6 Atten. board was confirmed defective board, after several swapping tests. 6. issue is my A6 board is "3 relay" version, can't find matched schematics/troubleshooting yet. the A6 board marked "08903-60105 / A-2242-10", Would someone could instruct where to have it. A6 board from second unit is "2 relay" version matched the service manual. almost last mile to go, any hints would be super appreciated! Chen-shen