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Thanks, I will order a few pieces to have them just in case. Best regards, Razvan

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

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

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

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

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

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

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

Thanks Ozan..! Will report back here on the transition from SOJ to DIP for those that may follow...

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

I've got nice isolation transformers for sale if anyone needs one. MGE Ultra Isolation 2.4 kVA and smaller.

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.

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

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

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

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

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

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

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

Or the other way round? Put the instrument on an isolation transformer. cheers Martin