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Date
Re: HP 70590A Information wanted part of HP 70000 / MMS
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
By Paul Bicknell · #95679 ·
Re: HP 70590A Information wanted part of HP 70000 / MMS
I have the service manual and the CLIP for this module. Let me know if you have any specific questions. Thanks, David Slik VE7FIM wrote:
By David & Laura · #95678 ·
Re: E4401B No 50MHZ Cal signal
Hi Or treat yourself to a thermal imaging device i have found it to br very useful.
By Mainline · #95677 ·
Re: HP 8720D - Debugging story
One (1) is closed/on Regards, Stephen Hanselman Datagate Systems, LLC 3107 North Deer Run Road #24 Carson City, Nevada, 89701 (775) 882-5117 office (775) 720-6020 mobile
By Stephen Hanselman · #95676 ·
Re: HP 8720D - Debugging story
Since I can never tell what is 1 and what is 0 on these switches, here is a picture of the "Normal" setting for S400: I can't find any information on what positions 1-7 do. I do remember they have
By pianovt · #95674 ·
Re: HP 8720D - Debugging story
I think you have option 089, or at least some of the required hardware. I see an R-channel switch in your picture. It's that gold plated microcircuit between the wide rainbow-colored ribbon cable and
By pianovt · #95673 ·
Re: HP 8720D - Debugging story
Hi Vladan, Thanks for the thoughts on the options. How can I know if option 89 is available (hardware wise)? Being able to do mixer measurements (easily) would be really nice. I have no problem using
By Derek Kozel <derek@...> · #95672 ·
Re: HP 8720D - Debugging story
Derek, to me those pictures look like it's an option 007 + option 085 configuration (high power measurements).This means no bias-Ts, and it will be a bit of work to convert to 4-sampler. This option
By pianovt · #95671 ·
Re: E4401B No 50MHZ Cal signal
Plugged in a Tektronix 7000 series counter (7D15 to be exact), on an extender. It wasn't working. I had the room lights dim for whatever reason, hopefully to see anything that was unhappy. Everything
By Harvey White · #95670 ·
HP 8720D - Debugging story
Hello, I've just acquired an HP 8720D which was "working until one day it stopped". I tried turning it on and the machine started continuously rebooting every ~6 seconds. Nothing is ever displayed to
By Derek Kozel <derek@...> · #95669 ·
HP 8563A Revised design clips & service documentation
Hello, Apparently there are some early version A4 Log Amp/Cal Oscillator? and A5 IF Boards that were used in the 8563A Spectrum Analyzer.? I must have a later version and would like to know if there
By rpoz28cam · #95668 ·
Re: HP8657B Mains Filter Disaster
More about this common type of failure: https://www.eevblog.com/forum/repair/hp3458a-schaffner-mains-line-filter-failure/ I had one go off in a HP3457A. Took out 16 A line breaker, created a jet of
By Carsten Bormann · #95667 ·
Re: HP8657B Mains Filter Disaster
I would suggest *not* replacing with the original. Schafner filters are fine in the USA, but double the mains voltage, and they are stink bombs. I would not use a used or old filter as a replacement.
By Chuck Harris · #95666 ·
Re: HP8657B Mains Filter Disaster
Yes, totally normal behaviour! Problem is the filter caps are pre the power-switch/voltage selector and they just give up eventually. A lot of my equipment was bought in the USA so those caps have
By Adrian Nicol · #95665 ·
Re: HP8657B Mains Filter Disaster
Hi It is preferable to use a newly manufactured unit when in use in Europe, the voltage ratings of the filter capacitors has been raised. 73 George G6HIG
By george edmonds · #95664 ·
Re: HP8657B Mains Filter Disaster
Hi, that's, unfortunately, normal. They go up in smoke after some age. I believe (if you are brave) you can use the Equipment afterwards, normally they fail OC (at least mine have so far), but I would
By Martin Rickes · #95663 ·
Re: E4401B No 50MHZ Cal signal
All of this trouble due to a shorted 390 pF capacitor!
By Mark Bielman · #95662 ·
Re: HP8657B Mains Filter Disaster
RS Components sell them IIRC, but not dagger cheap! David Sent: 01 April 2019 14:47 To: [email protected] Subject: [HP-Agilent-Keysight-equipment] HP8657B Mains Filter Disaster
By David C. Partridge · #95661 ·
HP8657B Mains Filter Disaster
Had a disaster with the mains socket/filter/voltage selector on my 8657B yesterday. Wasn't even switched on and smoke suddenly poured out of the back; I initially assumed it was an electrolytic but
By NigelP · #95660 ·
Re: HP 5315A modding
Hi folks, Thanks for all your tips. I have just been in that counter. My main concern was that there was something bad going on causing that humming, like shorted diodes or caps. But there isn't, all
By Wolfgang Mahringer · #95659 ·