Muon telescope
At the beginning of 2016, I had built my first muon telescope. It has only two counters. This time I'm going to build a new setup, however, the electronics remains…
Step to the neutron stars 13. A new attempt
At the beginning of February, I again made new attempts to catch the pulsar. Once it was a fail (cable disconnected from the antenna and I had noticed it too…
Step to the neutron stars 12. First attempt to receive the signal
So all the components of the radio telescope are ready and its time to assemble them together and try them in practice. The first version of the amplification/filtering module is…
Step to the neutron stars 11. RF bandpass filter
In the case of artificial radio interference (Radio Frequency Interference), the external filter is a necessary part of the radiotelescope. Let's start with the basics. In the simplified case, the…
Step to the neutron stars 10. Noise
A step back to the radiometer equation There some points which bother me and I think it is important to mention. The RMS value of noise power (thermal noise) in…
Step to the neutron stars 9. How RTL-SDR works
The best article I have seen on the principles of the RTL-SDR receiver operation is described here. Here is a brief synopsis of this article. In a few simple steps,…
Step to the neutron stars 8. Assembly and test of antenna
The construction of the antenna took time. But it ready and it wiggly fit in my apartment. The construction of the antenna I start with linking of the boom sections.…
Step to the neutron stars 7. Some practical questions
Here I summarize some questions, which I had asked myself and on which I had found the answers. Why the impedance of the antenna is 50 Ohm when the open…
Step to the neutron stars 6. Antenna theory in practice
In this note, I will progressively explain some basics of antenna theory and will present the results of antenna modeling. I had already used a few terms (directivity, impedance), which…
Step to the neutron stars 5. Antenna simulation
As any creative project have the turns in the wrong way, the same happens to me when I had considered an in-phase antenna array. The problem of this antenna is…