Category Archives: Other stuff

Electronics art

While repairing I sometimes make pictures from front and back PCB and then use the gimp to overlay them but this time I played around a bit further just for fun. It now looks like an aquarel drawing. And this … Continue reading

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Infratek 103A Wattmeter

This is an Infratek 103A Wattmeter. It is made in Switzerland and measures power over a very wide range. I do not have a manual so I do not know the specs. It is a 6 digit meteer. It can … Continue reading

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Storage of parts

The way I store my components. This way I can place the boxes with parts I need on my desk. Behind these boxes I store my tubes, sorted by prefix. Here I store bigger parts. Behind these boxes I store … Continue reading

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DIY universal PCB holder

While probing a circuit it is handy if you can stabilize it so it does not dragged over the table edge by the weight of probes and other wire connections. There are a lot of solutions for sale but I … Continue reading

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Emco Unimat 3 lathe

This cute little lathe I bought many years ago. I made this setup on a little car so it is ready for use when I need it. It came with a lot of extras. I replaced the motor by a … Continue reading

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Velleman K8200 3D printer

I have build this 3D printer. I want to use it to make cabinets, knobs etc. I made some modifications like copper washers between the extruder parts to prevent leaking. The pcb holds the thermistor. That  way it is safer … Continue reading

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HP-Moseley model 135 XY writer

  This writer I got from Florick. It is not working (yet) First I have to find a fan, penholder, a manual and schematic. It should be from the 60’s. Moseley was a department of HP. Update: These schematics are … Continue reading

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Williams Dipsy Doodle Flipperkast restauration

In rather bad shape, it was played until it stopped. Some burned coils, stuck rotors and very dirty. The playfield has no glass. The  doodle bug is missing, instead a motor and blinking light. All rubbers are worn, flippers worn. … Continue reading

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HP-9100A calculator

  To have a reference while repairing the 9100B the owner brought his very nice looking, but also not working 9100A. This is the first version. The processor seems to be working. You can test this keying : 1 CHS … Continue reading

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HP-9100B calculator

This is a report of progress made for the owner during the repair of a HP-9100B calculator. There are no microprocessors in side. It is one of the most famous calculators ever made. The first scientific calculator. I have no … Continue reading

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HP-35 calculator

To calculate in style. The Hewlett-Packard HP-35 was the first pocket size scientific calculator in the world. This indirect killed the sliderule.  It uses RPN, reverse polish notation. It is made from 1972 to 1975. Introduction price was around 400 … Continue reading

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Ultrasonic cleaning

The most easy way to clean dirty pots, knops, switches, connecters ect is ultrasonic cleaning.  In basic, the soundwaves form tiny bubbles that implode to the surface. The implosion sucks the dirt out of the material. I first had a … Continue reading

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Old stuff

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vakantie lab

Wat doe je als het een regenvakantie is en het vakantiehuisje een kamer over heeft, juist, solderen  Helaas had ik de freesjes van mijn gewone 230V  dremel meegenomen en die paste niet in de 12V versie, dus dan wordt smd … Continue reading

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Good electronic Books

Knowledge does not come by itself, beside internet there are curious things named books. They are a good source of knowledge. This is a part of my collection. The concepts range from Tektronix, made in the 60’s. On the picture … Continue reading

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Germanium transistors

De eerste transistors waren gemaakt van germanium. Dat spul (uit rij 4) werd vervuild met een element een stapje hoger dan wel lager uit het periodiek systeem (rij 3 of 5) bv gallium of arsenium en was een echt half … Continue reading

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Heathkit HD-10 keyer

Deze keyer kreeg ik kado van Jos, PA0AMX. Het is een heathkit HD-10 keyer/morse sounder. Deze zijn er waarschijnlijk ongeveer 50.000 gemaakt. Zo’ n 10 jaar vanaf halverwege de jaren 60. Je kan er transceivers mee sleutelen die negatief naar … Continue reading

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Philips EE2003

Als 14 of 15 jarige kreeg ik een Philips experimenteerdoos. Het boek heb ik nog maar zonder kaft. Het moet gezien het boek iets uit de EE20xx reeks zijn geweest. Ik heb de veertjes nog en die zijn echter anders … Continue reading

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Demonstratieset Radio- en hoogfrequenttechniek

Deze set is gebruikt op het 1e christelijke lyceum in Zeist. De zendvergunning zit er nog bij. Gedateerd 1964. Ik heb twee van deze sets. Ze werken met een EL84.

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Mooie buisjes

Zomaar wat plaatjes van oude buizen.

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Externe speaker, waarschijnlijk murphy

Deze erg grappige speaker in een zwaar gietaluminium chassis is zo goed als zeker ex marine. In ieder geval engels en er zit een knop op zoals door murphy werd gebruikt. De knop is een volume potmeter. Er zit een … Continue reading

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Trimsleutels

Bij het afregelen van oude radio’s ontkom je niet aan het verstellen van trimmers en spoelen. Gebruik daar NOOIT een gewone schroevendraaier voor. Ten eerste beinvloed het metaal van de schroevendraaier de capacitiet of inductie. Ten tweede kun je er … Continue reading

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