Entries by Stefan Helander

Running HP EliteDesk 800 G1 USDT on 13.8 volts DC

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I got a HP EliteDesk 800 G1 USDT Ultra Slim Desktop computer for my ham schack. This is a small computer running on an external power supply just lika a laptop. It turned out to be the major source of RFI in my ham schack.

I suspected the power supply was the culrpit as those are switched ones and thought it might be possible to run the computer directly on my 13.8 VDC power supply that I use for my radios. The only voltages used in a computer is 12 and 5 volts, so there is probably a voltage regulator on the power input that regulates the voltage down from the 19 volts DC that the power supply outputs. Will it also run on 13.8 VDC?

Ispconfig3 certbot is not renewing certificates (Ubuntu 20)

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When creating a new site, a valid certificate was issued but when expiring they where never renewed. Investigating /etc/letsencrypt directories was missing the usual subfolders, like live for example. It turned out the server had both acme.sh and certbot installed. The solution was to remove certbot. Investigate if the directory /root/.acme.sh exists and it’s contents. […]

Joomla banners register clicks on wrong banner

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I had a client site using banners, configured to register clicks on each banner. The client discovered that sometimes clicks was not registered on the correct banner. Initially it looked like banners with the same target link (URL) was registered on the banner with the lowest ID. This turned out to be misleading. The cause […]

Anytone D578UV CPS Tools -> Firmware update doesn’t work

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I had problems with the CPS software version 1.16 when trying to update the firmware. The window when selecting Tools -> Firmware just didn’t open. It turns out the software seems really buggy. Solution: When CPS is running, open a File Explorer and go to “C:\Program Files (x86)\Anytone\D578UV_1.16\” and double click on UpdateQX_Firmware_Update.exe. The window […]

Virtual com port / serial port for Windows 10

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Sometimes it can be handy to create virtual com port pairs or virtual null modem using software. There are several solutions available, free and paid. The commercial softwares do work but with prices like 130 USD it is a bit out of range for a hobby project. However, I found a project called com0com which […]

Joomla offline mode not working [solution]

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A client was developing a Joomla site and had set it to Offline mode. In order to have a beta test group access the site for evalutation and tests, they had created a user account for the group and set it to Registered. The permissions for Registered users was set to Allow Offline access. At […]

Nagoya RB-400 – it just fell to pieces

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I purchased a new, unused Nagoya RB-400 lidmount antenna mount from a seller on eBay. After a couple of days of use, I was going to adjust the angle using the hexagon socket screw. When unscrewing it, a part of the mount just fell off (see photo). I did not overload the mount (largest antenna […]