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PA0RDT Mini Whip – Installing In an Apartment building

March 3, 2018 by Jack Zimmermann 6 Comments

I’ve recently got interested in RF radio. But I live in an apartment, so I can’t do any installing of large antennas. So after doing the obligatory Google search, I narrowed it down to two antennas. The Wellbrook Loop Antenna and the (much cheaper) PA0RDT Mini-Whip. Being short of cash, I decided to buy a cheap Mini-Whip […]

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Filed Under: Electronics Tagged With: Antenna, Electronics, Ham, Radio, RF

Cetus 3D Y-Axis Adjustment The Easy Way

February 21, 2018 by Jack Zimmermann 1 Comment

I’ve been busy the last couple of weeks, learning all the ins and outs of my new Cetus3D 3D-printer. It’s a cheap printer for around $300, but it has linear rails and can give excellent results. Unfortunately, the calibration quality from the factory was terrible, which is unfortunate on such a superb printer. My Y-axis […]

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Filed Under: Electronics Tagged With: 3D Print, Electronics

Cetus3D MKII Can’t Calibrate Nozzle Close to Build Plate

February 1, 2018 by Jack Zimmermann Leave a Comment

After finally getting my Cetus3D MkII 3D-printer I was eager to start to print. When I started through the steps to calibrate the printer by adjusting the build plate height, but the print head/nozzle refused to get close enough to the build plate to finish the calibration! The cables on the motor came in contact […]

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Filed Under: Electronics Tagged With: 3D Print, Electronics, Problem

433 MHz Support in Node-RED

November 17, 2017 by Jack Zimmermann 10 Comments

 ITEAD contacted me about testing some new equipment and write an unbiased blog post about it. I usually reject all such offers, but this one worked for me. Why? Well, all the stuff they offered was on my shopping list anyway! And my home is quite literally chock full of Sonoff relays, lamps, etc. So the […]

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Filed Under: Electronics Tagged With: Electronics, Home Automation, MQTT, Node-RED, Sonoff

Retr0bright – Will It Last?

November 3, 2017 by Jack Zimmermann 8 Comments

Over the years I’ve been reading about a way of restoring old computers and other equipment where the plastic has turned yellow and how some bright guys developed a method called Retr0bright to reverse the process. The reason for the yellowing of the plastic is the flame retardant bromide that is infused in the plastic […]

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Filed Under: Electronics Tagged With: Electronics, Retr0bright, Woz

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Portrait of Jack Zimmermann I'm a Swedish computer old timer hacking away on computers since 1979. I'm a total Apple and Linux gear head. Right now, I'm really into electronics. [Read More]

Recent Posts

  • Atom Editor Platformio Hangs at startup endless restart – fixed
  • Hackintosh AMD Shutdown Problem with Fenvi FV-T919
  • Hackintosh Water Cooling Fan Problem
  • MiSTer FPGA Getting Arcade Cores To Use mra Files
  • Quartus Prime FPGA USB-Blaster Problems On Ubuntu 18.04

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