The antenna seems always to be a compromise between practical matters and performance. While not being the most high performance antenna, I find the end fed half wave (EFHW) a very practical antenna, especially during portable operations. The EFHW doesn’t need to be straight. It can be bent in angles and be “abused” a lot. […]
Author Archive for: stefan
About Stefan Helander
I was born a nerd! As a child I was fond of fiddling with all kind of thechnical stuff, discovering how things work and often fixing them. As a 6 year old I fixed my grandmothers 220 volts wiring.
The interest in technical stuff grown even bigger in the teenage years where I got my amateur radio license and developed a keen interest in computers.
Today I am proud to be a nerd. It is a part of my profession.
To all of you nerds and geeks out there - remember that nerd is the new sexy! :)
This is kind of a special scenario but actually occured for me. A port on the pfSense WAN should be NAT:ed to an IP-address located on a remote subnet via an ipsec tunnel. The problem here was the router on the other end of the tunnel did not route all it’s outgoing traffic over the […]
This is caused by a bug when saving the translation file concerning the langauge key for “Let’s Encrypt log”. When the translation file for the Monitor tab is saved, the necessary backslash before the ‘ in “Let’s” is not saved into the file. The problem is described in this bug report: https://git.ispconfig.org/ispconfig/ispconfig3/-/issues/5881 but for the […]
In a house in Denmark I needed to clean the water trap in a floor drain looking like the one in the photo. (For some weird reason, these kind of household tasks always end up on the male… But that is another discussion :).) I wrongly made the assumption that I needed to unscrew the […]
I wanted to make a “stealth installation” of my Anytone AT-D578UV radio in my Toyota Prius (2008) so I don’t have to worry so much for burglars when parking the car. Below the FM-radio is a compartment, when removed, leaves a space big enough for the radio. There is plenty of space behind the compartment. […]
With the number of assigned DMR ID:s on radioid.net going over 200.000 we are over the limit of the capacity for the Contact List on the older Anytone models. Anytone:s under estimation in design is not the first in history. Remember Bill Gates saying that no-one, ever, is going to need more than 640 kB […]
The problem was that module class suffix was not working and the first solution was to make a tpl file override, placed in local/tpls/blocks and change style=”raw” to style=”xhtml” for the module in question. This solution had been working for years, but suddenly the client reported that their site was “looking weird” again. It turned […]
Microsoft is phasing out Internet Explorer and moves over to Edge. In order to facilitate that, some users experience that when they click on the Internet Explorer, it actually opens up Edge. In rare situations, the user might need Internet Explorer instead of Edge. It is possible to override this. Start Microsoft Edge and open […]
After an upgrade of WordPress, the site reported “There has been a critical error on your website. Learn more about debugging in WordPress.”. When investigating the web server log files, errors reporting “Call to undefined function the_field()”. Solution: During the upgrade process, the plugin “Advanced Custom Fields” had been disabled. By activating the plugin, the […]
Being an amateur radio operator (or HAM-radio operator) I need to use electronic devices with as low radio emissions as possible in order to keep a low noise level on the shortwave bands (or HF-bands). I found out that my Cisco RV160 router was one of the major sources of radio noise (RFI or Radio […]