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Re: Test Equipment where battery failure causes SERIOUS problems
Dr. David Kirkby (Kirkby Microwave Ltd)
On 16 February 2016 at 21:27, Dr. David Kirkby (Kirkby Microwave Ltd) <drkirkby@...> wrote:
Just to clarify, the extra hour was not for replacing the battery - the owner had already done that. The extra hour was for the fact every range needed zeroing and setting to full scale.? |
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Re: HP DVM / DMM technological history
Dave Brown
The 970A- I'm still chasing a battery pack for one- dead or alive (I just need the case)- but son has recently got a 3D printer- I smell success looming!
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Dave, ZL3FJ ----- Original Message -----
From: "'Mike Feher' n4fs@... [hp_agilent_equipment]" <hp_agilent_equipment@...> To: <hp_agilent_equipment@...> Sent: Wednesday, February 17, 2016 3:05 AM Subject: RE: [hp_agilent_equipment] HP DVM / DMM technological history I forget the nomenclature of the pen style red LED readout DVM. I had several and they were neat. Regards ¨C Mike Mike B. Feher, N4FS 89 Arnold Blvd. Howell, NJ, 07731 732-886-5960 From: hp_agilent_equipment@... [mailto:hp_agilent_equipment@...] Sent: Tuesday, February 16, 2016 9:00 AM To: hp_agilent_equipment@... Subject: [hp_agilent_equipment] HP DVM / DMM technological history Hello All, I am doing a bit of research to accomplish a comprehensive understanding of the DVM / DMM technology from the late fifties and early sixties into the 90's. I have come up with what I think is a list that covers the models I should be looking into. Are there any more digital meters that should be added? 405 2401 2402 3435 3440 3450 3455 3456 3460 3465 3490 Cheers, David |
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Test Equipment where battery failure causes SERIOUS problems
Dr. David Kirkby (Kirkby Microwave Ltd)
For many bits of kit, a battery is used to run a real time clock, and a failure is not a big deal. But for others it can be quite serious. It would be useful if we had a list of HP equipment where battery failures cause serious problems. Here are 1.5 entries. 1) HP 70700A digitizerSo if you have an 70000 series MMS with one of those, make sure the battery is replaced and done so without losing the data in SRAM. So a battery failure causes a loss of calibration data, and perhaps a higher charge to get a 3457A calibrated, since everything needs adjusting, not just the odd range which might be out of spec. Dr. David Kirkby Ph.D CEng MIET Kirkby Microwave Ltd Registered office: Stokes Hall Lodge, Burnham Rd, Althorne, Essex, CM3 6DT, UK. Registered in England and Wales, company number 08914892. Tel: 07910 441670 / +44 7910 441670 (0900 to 2100 GMT only please) |
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Re: HP DVM / DMM technological history
Leon Robinson
I have a 405AR and a 970A. Also a Non HP Digitec Z-204B. ? Leon Robinson ?? K5JLR Political Correctness is a Political Disease. From: "d.garrido@... [hp_agilent_equipment]" To: hp_agilent_equipment@... Sent: Tuesday, February 16, 2016 8:32 AM Subject: [hp_agilent_equipment] Re: HP DVM / DMM technological history
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AH YES!!! The 970 tiny 3.5 digit handheld DMM. ?Was that the very first handheld? d the latest update: 405
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Re: HP DVM / DMM technological history
¿ªÔÆÌåÓýSpeaking of the 3478 (which I also have), is the 3468.? It¡¯s very similar to the 3478, but uses HP-IL rather than HP-IB.? (this was for use with the handhelds like the HP-41, HP-71 and the like). ? Daun ? Daun E. Yeagley, II, N8ASB ? From: hp_agilent_equipment@... [mailto:hp_agilent_equipment@...]
Sent: Tuesday, February 16, 2016 1:50 PM To: hp_agilent_equipment@... Subject: RE: [hp_agilent_equipment] HP DVM / DMM technological history ? ? How about the workhorse 3478?? Very popular and as low as $150 guaranteed working on eBay. ? PS: My stable of HP DMMs is a 3456, 3457, and 2 3478¡¯s. ? Regards, John K1AE ? From: hp_agilent_equipment@... [mailto:hp_agilent_equipment@...] ? ? Hello All, ? I am doing a bit of research to accomplish a comprehensive understanding of the DVM / DMM technology from the late fifties and early sixties into the 90's. ?I have come up with what I think is a list that covers the models I should be looking into. ?Are there any more digital meters that should be added? ? 405 2401 2402 3435 3440 3450 3455 3456 3460 3465 3490 ? Cheers, ? David |
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HP/Agilent T&M Catalogs for Sale
I have all the HP/Agilent Test & Measurement Catalogs from 1985-2001 in excellent condition as well as 2ea 1989 (50th anniversary) catalogs in their original box. I worked at HP/Agilent in Baltimore & Philadelphia area so there is a personal history with these catalogs. Let me know if interested & can send pictures. Mike |
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Re: HP8593A Power Supply repair
Roumen, ????? I would like to have a copy of the power supply schematics if it is possible.? My HP8591A has the low 5.2 volt supply problem that others have mentioned.? I am very experienced in this type of electronics and I would like to find a solution that is lasting and that I can share with others. ??????We have a family friend in Burgas and relatives in Russia, we are in the US. ? Ted |
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Re: HP DVM / DMM technological history
¿ªÔÆÌåÓýHow about the workhorse 3478?? Very popular and as low as $150 guaranteed working on eBay. ? PS: My stable of HP DMMs is a 3456, 3457, and 2 3478¡¯s. ? Regards, John K1AE ? From: hp_agilent_equipment@... [mailto:hp_agilent_equipment@...]
Sent: Tuesday, February 16, 2016 9:00 AM To: hp_agilent_equipment@... Subject: [hp_agilent_equipment] HP DVM / DMM technological history ? ? Hello All, ? I am doing a bit of research to accomplish a comprehensive understanding of the DVM / DMM technology from the late fifties and early sixties into the 90's. ?I have come up with what I think is a list that covers the models I should be looking into. ?Are there any more digital meters that should be added? ? 405 2401 2402 3435 3440 3450 3455 3456 3460 3465 3490 ? Cheers, ? David |
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Re: HP DVM / DMM technological history
A side note:
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HP advertised but never produced: >>> <<< "Prism, the interface card that never was" I/O card for reading voltage. Dennis -------------------------------------------- On Tue, 2/16/16, Ken Chalfant kpchalfant@... [hp_agilent_equipment] <hp_agilent_equipment@...> wrote:
Subject: Re: [hp_agilent_equipment] HP DVM / DMM technological history To: "hp_agilent_equipment" <hp_agilent_equipment@...> Date: Tuesday, February 16, 2016, 1:07 PM Greetings, Two interesting HP DMM¡¯s were the HP 3476A which could be configured as a stand alone DMM or integrated on top of a scope. The other was a unique handheld auto-ranging probe-like DMM - the HP-970A. ?These were really kind of neat and handy. ?Unfortunately, they had a real tendency to ¡°grow legs¡± and disappear! ?When they were a current product, sometime in the ¡¯70¡¯s, I think they were $300 - $400 which was more then than it is now. ?When HP designed the 970 they must have never considered how tempting they would be to follow people home. Ken On 16Feb, 2016, at 7:00 AM, d.garrido@... [hp_agilent_equipment] <hp_agilent_equipment@...> wrote: Hello All, I am doing a bit of research to accomplish a comprehensive understanding of the DVM / DMM technology from the late fifties and early sixties into the 90's. ?I have come up with what I think is a list that covers the models I should be looking into. ?Are there any more digital meters that should be added? 4052401240234353440345034553456346034653490 Cheers, David |
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Re: Replacing ROMs!
Didier has done a great job with his site, then again it is always a good idea to have data in more than only one place at a time, the IT world MTBF is likely lower than the human one.
Paul Le?mardi 16 f¨¦vrier 2016, Artek Manuals manuals@... [hp_agilent_equipment] <hp_agilent_equipment@...> a ¨¦crit?: > ? > > On 2/16/2016 9:10 AM, 'Daun Yeagley' daun@... > [hp_agilent_equipment] wrote: >> I agree with you, Chuck. And Didier¡¯s site has a lot more room than the >> (unreliable) Yahoo site¡ >> >> Daun >> >> *Daun E. Yeagley, II, N8ASB* >> >> *From:*hp_agilent_equipment@... >> [mailto:hp_agilent_equipment@...] >> *Sent:* Tuesday, February 16, 2016 8:44 AM >> *To:* hp_agilent_equipment@... >> *Subject:* Re: [hp_agilent_equipment] Replacing ROMs! >> >> Perhaps you might think that, but Didier's site has a ROMS >> section which aspires to have ROMS for just about everything. >> >> Far easier to go to one place for everything, than to go >> hunting hither and thither. >> >> -Chuck Harris >> > > Another vote for Didier's site ...Among other things unbeknownst to most > of you is he has a succession plan for his site in the event of his > death for it to carry on ...He and I discussed this at length a few > years ago and as a result KO4BB.com will become the final resting place > for the ArtekManuals files after my passing ...None of us are getting > any younger...However if my gene pool is any indicator don't get > excited, I plan to outlive all of you anyway .... my father is 96 and > still hanging in there > > -- > Dave > Manuals@... > > > --- > This email has been checked for viruses by Avast antivirus software. > > > |
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Re: HP DVM / DMM technological history
¿ªÔÆÌåÓýGreetings,Two interesting HP DMM¡¯s were the HP 3476A which could be configured as a stand alone DMM or integrated on top of a scope. The other was a unique handheld auto-ranging probe-like DMM - the HP-970A. ?These were really kind of neat and handy. ?Unfortunately, they had a real tendency to ¡°grow legs¡± and disappear! ?When they were a current product, sometime in the ¡¯70¡¯s, I think they were $300 - $400 which was more then than it is now. ?When HP designed the 970 they must have never considered how tempting they would be to follow people home. Ken
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Re: HP DVM / DMM technological history
Larry Bower
¿ªÔÆÌåÓýYou are missing the 3480.?Do you want to include companion units like the 3495 Scanner ? I worked at the Loveland Instrument Division, LID, on voltmeters from 1969 until 1975 on various projects. Larry Bower On 2/16/2016 6:08 AM, 'Daun Yeagley'
daun@... [hp_agilent_equipment] wrote:
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Re: HP DVM / DMM technological history
Yes, the 3458A should definitely be in there: On Tue, Feb 16, 2016 at 9:17 AM, walter2@... [hp_agilent_equipment] <hp_agilent_equipment@...> wrote:
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Re: HP DVM / DMM technological history
I am trying to stick with one company at a time first, then I will need to branch out to the other quality makers to compare and learn. ?I know the 405 was a commercial flop relative to the 3440 and that there were a few key players early in the game, esp. NLS and Cubic, but I have found few others.
I am finding it quite an interesting journey so far. Any thoughts or ideas or memories would be great. I have located most pertinent HP Journals, App Notes, and Catalogs so the easy part is done. ?Now it is time to dive in and see where it takes me. ?Thank you all for your input!!! ?Keep it coming. Cheers, David The latest list: 405 2401 2402 3403 3435 3437 3440 3450 3455 3456 3460 3465 3466 3467 3470 3478 3480 3490 |
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Re: HP DVM / DMM technological history
The real flagship DMM from HP is still the 3458A, it remains the favorite of most high end cal shops and is used by many as their primary shop standard.? capable of accuracy to a few ppm in some modes, it is really a marvel of engineering a every level.
oddly, it is the fluke 8506A that was the preferred standard for true RMS AC measurements. other very high end units include Datron and Schlumberger models. all the best, walter (walter2 -at- sphere.bc.ca) sphere research corp. |
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Re: WTB 3 Pin Socket for Probe Power
As a quick update - if you are in the UK there is an 1122A for 50 quid or best offer on a well known auction site or one for 63 bucks if you're other side of the pond. Not a totally silly price for a well built complete power supply in a handy box ready to go? On Monday, February 15, 2016 11:54 AM, "Steve A starmux64@... [hp_agilent_equipment]" wrote:
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Has anyone got a spare 3 Pin Socket that is used on the 1122A Probe Power Supply or 8553B RF Section?? I'm building a power supply cable?for the 1120A 500MHz Probe and it needs +15V/0V/-12.6V from a PSU.? The alternative is to buy a 1122A Power Supply! Thanks Steve |
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Re: HP DVM / DMM technological history
David My 3478A is a DMM.? I guess you will get a long list! Steve From: "d.garrido@... [hp_agilent_equipment]" To: hp_agilent_equipment@... Sent: Tuesday, February 16, 2016 2:00 PM Subject: [hp_agilent_equipment] HP DVM / DMM technological history
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Hello All, I am doing a bit of research to accomplish a comprehensive understanding of the DVM / DMM technology from the late fifties and early sixties into the 90's. ?I have come up with what I think is a list that covers the models I should be looking into. ?Are there any more digital meters that should be added? 405 2401 2402 3435 3440 3450 3455 3456 3460 3465 3490 Cheers, David
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John Allen