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Date
Re: HP DVM / DMM technological history
Don't forget the 5265A Digital Voltmeter plug-in for the 5245-series counters! Jeremy N6WFO
By Jeremy Nichols · #73578 ·
Re: HP8593A Power Supply repair
see msg# 67510 in the group messages.. Regards John
By John <gielisj@...> · #73577 ·
HP 3325A ROM Replacement
I thought I would summarize a somewhat meandering thread. I¡¯ve received the Artek manual and it is great! It appears I do have a failing ROM IC. As time went by HP changed from 4 4k*8 chips to 2
By Max Frister · #73576 ·
Re: 8590E Video Display problem
Depending on the model the 8590 series video displays have different horizontal sweep rates. The video displays are externally identical but the 8590A has a lower sweep rate (15,750 Hz?) than the
By wb6iqs@... · #73575 ·
Free for shipping: HP 412A
Free for shipping ( We believe this thing will fit into a USPS large flat rate box ($26) to the lower 48: All electronic innards are there, including panel and meter and all panel switches. Outer case
By Ashley40@... · #73574 ·
Re: 8590E Video Display problem
Bad cap somewhere...holding an address line down on a cold start ...then on a warm start the cap is feeling better and lets the address line come up faster -- Dave Manuals@...
By Dave / NR1DX · #73573 ·
Date set for next Sphere Stuff Day/Ham Swap Meet
After lots of data collection, historical weather checking, and polling, Saturday, APRIL 9th is the date for the next Sphere Stuff Day and Okanagan Valley-wide Radio Amateur swap meet. This gives
By walter2@... · #73572 ·
8590E Video Display problem
I have an HP 8590E in which there is no video on initial power up. But consistently, if I shut the 8590E down anytime after about 2 minutes and turn it again, the display is perfect - until the next
By pbbob426@... · #73571 ·
Re: Weinschel step attenuator gets stuck
Tom, Afraid I don't have any help with this problem but a very warm welcome to the HP group. For those who don't recognise Tom's name and callsign, he is the brilliant designer of the DG8SAQ vector
By iancooper@... · #73570 ·
Re: Test Equipment where battery failure causes SERIOUS problems
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
By Dr. David Kirkby (Kirkby Microwave Ltd) <drkirkby@...> · #73569 ·
Re: HP DVM / DMM technological history
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! Dave, ZL3FJ
By Dave Brown <tractorb@...> · #73568 ·
Test Equipment where battery failure causes SERIOUS problems
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
By Dr. David Kirkby (Kirkby Microwave Ltd) <drkirkby@...> · #73567 ·
Re: HP DVM / DMM technological history
I just won a 3476B on ebay. I always wanted one of these "tricorder" DMMs. Item No. 272125448332 (the lit decimal points are just low battery indication) Robert G8RPI.
By Robert G8RPI · #73566 ·
Re: HP DVM / DMM technological history
I have a 405AR and a 970A. Also a Non HP Digitec Z-204B.?Leon Robinson ?? K5JLR Political Correctness is a Political Disease. To: hp_agilent_equipment@... Sent: Tuesday, February 16,
By Leon Robinson <leon-robinson@...> · #73565 ·
Re: HP DVM / DMM technological history
Speaking 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
By Daun Yeagley · #73564 ·
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 &
By Mike Everhart · #73563 ·
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
By Michael Daniel · #73562 ·
Re: 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 Sent: Tuesday, February 16, 2016
By John Allen · #73561 ·
Re: HP DVM / DMM technological history
A side note: HP advertised but never produced: >>> http://www.hp9825.com/html/analog_i_o.html <<< "Prism, the interface card that never was" I/O card for reading voltage. Dennis
By czelusniakd · #73560 ·
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
By shakalnokturn · #73559 ·