Category Archives: Digital

Solartron 7150 added to the stack

Posted on December 17, 2019 by A. Cicuta

Now the trio of my 5.5 digits or better DMMs is working and logging which means I am out of IEEE 488 cables which means I ordered two more as there is a lot of my equipment that is really asking … Continue reading →

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HP 3456A & HP 3457A

Posted on December 11, 2019 by A. Cicuta

I am not dead yet, just very tired. This photo is just to show that something is happening on the DMM side of things. As soon as possible, I want to write about linux-gpib, DMM and logging. A.C.

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Anritsu MS610A repair (faulty 6dB pad)

Posted on September 20, 2018 by A. Cicuta

This repair is my first foray into the almost-microwave realm. So, what was wrong with this SA? I bought it unresponsive to the front keyboard commands. After cleaning the contacts the unit started to be responsive, but the pushbuttons were … Continue reading →

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Modding an HP 3488A

Posted on February 26, 2017 by A. Cicuta

I happened to acquire two HP 3488A. They are called Switch/Control unit. That means that each of them can accept up to five different boards that do interesting things. There is a multiplexer, a matrix switch, a digital input/ouput board … Continue reading →

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HP 3488A: boring “repair”

Posted on November 19, 2016 by A. Cicuta

This one is the most disappointing repair I did if I can call this a repair. I bought two HP 3488A, one fully working but in not so great condition, the other one was in pristine condition but sold as … Continue reading →

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HP 3470: something is wrong again (bad readings) part 1

Posted on October 23, 2016 by A. Cicuta

Another multi-part post starts now. I already wrote about this measurement system here. That time the problem was the mainframe display module while this time I am rather sure the problem is the plug-on  function module: I checked with a second HP 3470 that found … Continue reading →

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Repair: HP 5328A part 3

Posted on October 10, 2016 by A. Cicuta

Let’s keep this series going. In the last episode, our suspect was A2U1 which is HP part number 1826-0065. That’s the way the IC is marked and that is also what is written in the service manual. But I am … Continue reading →

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My Morion MV197

Posted on August 26, 2016 by A. Cicuta

  I already talked about this OCXO here. It is used, it was cheap and it seems to perform as expected. Unfortunately I will not be sure about its frequency output until I build the pcb that I am going … Continue reading →

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Quick update: Morion MV197 & HP 5328A

Posted on August 9, 2016 by A. Cicuta

I’m still very busy but I think it is time for an update anyway. So let’s write something about OCXO and counters. As this is a quick update on something that I still have to work on, I won’t bother … Continue reading →

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Rubidium Frequency Standard, Part 1

Posted on April 24, 2016 by A. Cicuta

Some time ago I bought a Rubidium Frequency Standard. I guess I had too much time or maybe I spent too much time reading old posts from the time-nuts mailing list archive (which, by the way, is always a fascinating … Continue reading →

Posted in Digital, Electronics, Hardware | 1 Comment