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Hi, my 3325A is driving me crazy and no one could help yet, so I went over to a faulty HP3455A multimeter. It worked many years, but now it comes up with a OL display in DC. Cal test stops at

Here’s a YouTube video I found when I was repairing the attenuator in my 8902a. ?I followed his procedure and used the same watch repair o ring kit from Amazon (under $10 shipped).

I got a HP8754A recently that mostly works but seems low on available trace intensity. Maybe it just needs some internal adjustment, or maybe the CRT is weak on emission. Now that I have this one,

I found the problem, I simply made a mistake in the procedure. Everything is correct now. Yves

Hi Don I searched as you described but didn't find your repair procedure. What is the message number please? Thanks Jason NJ7K

It seems the cal files have one gain parameter starting at 50MHz in 50MHz steps. The smallest of the three files must’ve been intended for a system with an E2730 and the others for systems with

Hi, I have two 8591As to check, and for both, I'd like to correct the timebase. I followed the procedure in the service manual; it worked, and I correctly executed the CAL STORE command when

Thanks Just ordered 50 ? orings.? I have 2 Attenuators to repair.

How many of what size/type would be needed to replace all the ones used in an 8566B stack? I'd be interested in buying a set to refurbish my spec an when it becomes

Is anyone going to be buying 0-rings now? I'd like to do a group order since I now have an old, mostly working 8566B SA. These can be mailed around in letters for $.73...

Hey All, I noticed what looked to be a zero issue with my 435B, so I thought I'd run it through the zero carryover test (OSM 4-6) to see what was going on. While the meter meets all the ranges given

I used 0.5mm CS X 1.0mm ID 70 durometer from theoringstore.com on an attenuator from my HP

I have done over a hundred repairs of the 3332xA/B style attenuators. In the file listing in this site you will find a detailed step by step procedure with HPAK part nos. and Apple Rubber part nos.

The original o-rings were 1.0mm ID,2.2mm OD for a cross section of 0.6mm. None of the ones listed are exactly the correct size.

There's good older threads that go into some detail on this. I repaired one set a few years ago, posting here, and I recall the "surgery" aspect of the project. Mechanically, maybe one of the more

Which size should I select on that page? I have stuck attenuator sections in three different instruments, seems to be a common problem. Marko Cebokli

HiI just disassembled my hp8648 attenuator 33322-60011. I found the little rubber orings have broke. I need to know exactly how to disconnect the rods that the orings are on from the contact, without

Awesome and thank you! I bricked two E1439C digitizers from a bad firmware update and developed a procedure to fix those. I need to write a small program to reset the serial number. The A1 (main

I changed Q219 and its complementary transistor. Now I can adjust the 7.5Volts on F3. The amp is now fixed, but the A-CAL Fail error for square and triangle is still present. The output is correct,

Hi Anders Just go to the Files section i have been uploaded the Clip to 8590/91A Br Johnny