Eric Oosterbaan
Author's posts
Dec 24
with RTL-SDR and LNA receive cubesats
The last days I’am active with the modifications of the RTL-SDR dongle to receive the Cubesats. In short I had used the next mods (1st test fase); * 10 meter RG58 in coil arround the RTL-dongle to reduce noise and grounded to the USB. * removed the metal part on the USB connector. * added …
Oct 31
Receive CQ from ISS Space Centre
Today I received the ISS ‘loud and clear’ – 59+ on the 145.800 Mhz. I have tried to make contact back, but the TX was active on the wrong frequency, it should be 145.200 Mhz. If you want to listen to it, click on the sound-link. Recorded CQ from ISS dd:311013 (wav-file)
Sep 25
RTL-SDR dongle and Raspberry Pi 512 Mb
Today finished the soft- and hardware solution with the RTL-SDR and RPi. The main idea is to use the low-cost ($25) RTL-SDR dongle on the RPi and connect the RPi with a portable computer, with the SDR-client software on it. The test antenna is the 3-element HB9CV antenna only for 144-146 Mhz. This means that …
May 31
Building the Taurus case
In the next pictures you can see the result of the new Taurus case. You can find the case at ‘Otto schubert GMBH‘ (click on the name), and use the Art. Nr. 228. On the same shop you will find adds to make the box complete. First I started with the front, this is made …
Feb 27
Motorola GM950 small RS232 Interface
Today I have finished the small RS232 interface to manage the Motorola GM950 UHF/VHF transceiver. This small interface will cost you about 10 Euro, and will give you much fun ! I had made the PCB layout on the test board, the design is so small that you can easy do this (see picture). The …
Feb 14
Repaired new bulb in FC-757AT
Today I have ‘repaired’ the small bulb lamps in the FC-757AT of Yaesu. But the result is a little bad. The bulb’s should be ready for about 12 V, but the bridness is not good! If you have the correct bulb’s for the FC-757AT, please contact me ! On the pictures you can see the …
Jan 16
LED bar S-meter
The small project, LED bar S-meter, is active. I found the schema at the website from F6BQU. The schema is very easy and the result is nice (see the pictures) I’ve used to test the LED bar with the signal generator (function generator). The next I have to connect the LED bar S-meter on the …