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Re: E5052A Power On Test (3.3V Bus Supply)
Appreciate the suggestion. I reinstalled the A3 and tried cycling all the PSU connectors, including the motherboard one. I also brushed a tiny dab of Deoxit D100 on each male pin and cycled the
By Kevin A. · #151166 ·
Re: Tricks and thoughts about the 3457A battery
Thanks, I will order a few pieces to have them just in case. Best regards, Razvan
By Razvan Popescu · #151165 ·
Re: HP 53310A modulation domain analyzer memory upgrade
After a set from Aliexpress that didn't work, I got some from an eBay vendor I've found reliable (his stocks are all old, before the dodgy cloning started). I don't remember exactly what I bought but
By Adrian Godwin · #151164 ·
Re: HP3325A Trouble, Calibration FAIL 2 & 3
Hi all, I spent some more hours with my 3325A. I made a new effort and studied the service manual from scratch. The main trouble shooting flowchart directed me to group J, so I thoroughly examined
By Ralf Rosche · #151163 ·
Re: E5052A Power On Test (3.3V Bus Supply)
The first thing I recommend that you do is to look at all the PSU cables in the PSU area including the big multiwire one that loops back to the motherboard. As a first attempt, try partially removing
By jmr · #151162 ·
Re: HP6209B component location layout
Forgot to mention, I am thinking of leaving the 50K voltage adjustment pot in place as is, even tough already ordered a 100K replacement Bourns "Helipot". Everything seems to work fine, and I can
By Alex · #151161 ·
Re: HP6209B component location layout
I poked around a bit further and discovered that the +43V reference supply that was reading low at 34.2V actually had 14V of ripple on it. After removing and checking C12 a 450uF 85V cap, it was
By Alex · #151160 ·
Re: HP 85047A test set on 8753A analyzer -- switch control board jumpers to retrofit for opt 009 (mechanical switch)
I believe the control module (rear panel) has one or more abnormalities - I tried setting attenuator (stimulus>power>attenuator 1) and rather than adjusting the attenuator, the test set switched ports
By David Feldman · #151159 ·
Re: odd HP83651A error
There is some information on the low band module A24 in here starting page 36: https://www.worldradiohistory.com/Archive-Company-Publications/HP-Journal/90s/HPJ-1991-04.pdf I see now that this is a
By tom_iphi · #151158 ·
Re: HP 53310A modulation domain analyzer memory upgrade
Thanks Ozan..! Will report back here on the transition from SOJ to DIP for those that may follow...
By Dave Wright · #151157 ·
Error 7301 on HP70820a
Dear friends, I ask you if possible to help me solve my problem: I have SA HP70000 and a HP70820a that worked perfectly. At a certain point without having used it improperly an error occurred (7301 ch
By Xsherman · #151156 ·
Re: Tricks and thoughts about the 3457A battery
I've got nice isolation transformers for sale if anyone needs one. MGE Ultra Isolation 2.4 kVA and smaller.
By John Griessen · #151155 ·
Re: PN 1855-0064
Matched JFETs in TO-71, 6-pin packages are pricey.? Need to get a few with characteristics in the ballpark so I pulled a couple from a good meter and measured them.
By John Warren · #151154 ·
making 8620C sweeper scales
Hi all, Delurking to note that I took the liberty of uploading some additional files for DIY 8620C sweeper scales to this folder, which is hopefully
By Adam R. Maxwell · #151153 ·
Re: Repair HP3455A Multimeter
Hi, yesterday i got the Jfets from digikey, i replaced Q19,Q21,Q4 ,Q22 but the result is the same, still error 10. According to the flowchart the advice is to check Q4,Q19 and components
By Ralf Rosche · #151152 ·
Re: Tricks and thoughts about the 3457A battery
Hello Greg, I took the option of powering the 3457A in the normal way, with an earth connection as usual. At the same time I floated the soldering iron by powering it from a car battery and a
By Joel Setton · #151151 ·
Re: Tricks and thoughts about the 3457A battery
Hello David, What you are suggesting is obviously a good solution. However, it is WAAAAAY above what my "hobby budget" can afford. To make matters worse, Keysight will not do any business with
By Joel Setton · #151150 ·
Re: Tricks and thoughts about the 3457A battery
Hi Razvan, I used a Radiospares 185-4654 socket, which sells for one Euro or so. It turned out to be a no-brand Chinese import, you can find the same socket on Epay or other sellers. I could not find
By Joel Setton · #151149 ·
Re: PN 1855-0064
I'm not sure if you were asking if these meet the spec but I wanted to clarify how your finding verify the earlier numbers (for myself as much as future readers). I believe the spec of Idss@Vgs0 is
By Tom Haynes · #151148 ·
File Notifications #file-notice
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/8000 to
By Group Notification <noreply@...> · #151147 ·