Dire Wolf is a sound card based modem for packet radio. It can be downloaded for Windows and Linux here: https://github.com/wb2osz/direwolf Although there is a reference to MacOS, there are no further build instructions for Mac. Google reveals some info: one site references an outdated version, the other one proposes to install the brew build/port environment to provide the cmake tool. Installing an environment like brew for just one tool, which actually is a build tool by itself, is .. well .. odd. So I decided to build Dire Wolf on Mac without any hacks or special tools. After using the result for some time,Read More →

Both the IC-7300 and the IC-9700 have an IF output option. A great feature that enables the receive of all kinds of exotic transmissions. On the IC-7300, Icom pitched this feature at DRM receive. Soon after the IC-7300 launched, it became clear that the IF output bandwidth varies with the receive mode setting, which is illogical (Mr. Spock). For DRM receive, all is fine: set mode to AM, connect something like DREAM to the IF output and listen to PC audio. For CW skimmer, it’s a little more problematic, so maybe Icom only had DRM receive in mind when designing this. It will work, butRead More →

“My IC-7300 has lower power output compared to my previous transceiver.” Yes, with compressor off that’s true. Is the IC-7300 broken? No, it’s not. So what is wrong here? Often, the resulting discussion is about peak meters, PEP, settings, the weather and cosmic radiation. By chance I noticed, when changing tune power levels in WSJT-X, (the slider on the right) that the IC-7300 ALC has very fast attack time. An input level increase above max output level is corrected very quickly (to avoid overshoot). But then the reverse action, the same input level decrease, is followed very slowly by the ALC. It takes up toRead More →

I’ve decided to stop trying to use two different computers (one Win10 PC for amateur radio and one Mac Mini) more or less at the same time, switching back and forth keyboard and screen. So I upgraded my Parallels to version 15 (at reduced price..), installed Win10 on the Mac Mini and started to transfer the different amateur radio programs to the new Win10 virtual machine. Running WSJT-X on Win10 in Parallels works, but I noticed dropouts on transmit. No issues on receive, only transmit. Audio is all about timing, and generating the WSJT-X audio requires proper timing, something that a virtual machine will struggleRead More →