About me

Hi there!

My name is Mario, I live near Darmstadt in Germany. The mysterious name of this blog comes from the fact that my last name sounds like the greek letter µ in German and also in English, which I rather like since I can write my name with a single letter that also perfectly matches my personal interests. And you should at least be able to guess about those by now. I’ve always found electrical and mechanical stuff fascinating, ever since my childhood (or so I am told), and this has continued to be my passion until today. Also, I studied this topic until my Master’s in an attempt to make something I love to do my source of income – which some have called hopelessly romantic. Shut up, it worked out so far!

Since early 2014 I am proud owner of a ham radio advanced license (called class A here in Germany) and struggling to get my stuff together for medium- and long-range microwave radio communications, and hopefully a lot of satellite tech in the later future. This also matches with my EE studies which are mostly in digital signals processing and lately in microwave topics which I have always found intriguing because of the “black magic” appearance. As of 2013, I am in the middle of building my first UHF and SHF transceivers, so it might be that you meet me “on the air” some time soon – as DL6MU then. Aside from RF stuff, my interests are broad: analog, audio, digital, high-power, microcontrollers…oh, and good old electron tubes!

Why I write this blog? Mainly to motivate myself to tackle new projects I can write something about, practice my english writing skills and maybe get to know some interesting people who stop by here from time to time. Has already happened, so it was totally worth it. And also because I am not (or, should I say, no longer?) a reader of news collector/aggregator blogs that grab together all the cool tech stuff and keep me busy the whole day, trying to read up and figure out how other people do cool stuff that I had always wanted to do before. During the same time I can just learn some cool things myself and write about that. Unfortunately that also means *you* are currently being kept busy reading about *me* – for which I am sincerely sorry ;-) But, as it is, you are also a welcome guest here, so why not use the chance to discuss whatever you find interesting.

So that’s it for the quick overview – any more you’ll have to ask me directly. Enjoy your stay, and if you happen to meet me someday and know this blog – well, wouldn’t that be something :-)

5 thoughts on “About me

  1. Hi Mario
    Reading the comments on your site with interest . I have acquired a SI4002 which displays no errors on self test howevever it does display ADR23. Could you send me some operation instructions on how to override this setting as it appears to override the button functions. Also any basic information on how to input and enter Control settingswould really helpful.
    Thanks
    73
    Hugh G1AUR

    1. Hi Hugh,
      I think ADR23 is the standard value, it can’t be set using front panel entry. You need to open up the left side compartment and pull the IEC adaptor card. This one has a ribbon cable going to it, the second-widest, and it should be labeled IEC BUS. On the card there are 8 dip switches to set the 8 address bits. Default is position 1+2+3+5.
      73
      Mario DL6MU

    2. A follow-up:
      Unfortunately, I don’t have a operating manual for the 4002. If you have any specific questions about data entry just ask, maybe I can help out.
      What do you mean by ADR23 overrides button functions? The address display is for the IEC bus remote control and only displays the currently set address. There is no further entry and no further test option beyond this. My guess would be that – like with any digital HP equipment – there is a hidden test mode which allows the service technician to execute predefined test programs by number entry and some kind of button combo. So far I have not found it.
      73
      Mario

  2. Hello Mario, I am Stefan Neuschl OK88AA ( Czech reublic) and I have on my desk Schlumberger 4002, which is also wrong, after schwitch on, there is no any nunbers on the display only all leds is lighting on. I se that I have wrong EPROM and program cannot by loadet. Do you thing, that you can help me to make copy of your EPROMs tu test if it will go on. I am working in company ELEX in BRNO and we do servis for test equpment if you have interest I can help you with your wrong 4002. I have lot of experiences with Stabilocks – I do servis for them.
    I will be glad to hear you .
    73 Stefan OK8AA

    1. Stefan,
      hope you got my email some time ago. Unfortunately, the flu interrupted my progress with the ICs. Good news though: An EEPROM reader is up and running. I’ll remove the board this weekend and run the chips through next week.
      73 DL6MU

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