RTL-SDR on VLF (ALPHA Russian Long Range Navigation System receiving in Macedonia with MiniWhip) скачать в хорошем качестве

RTL-SDR on VLF (ALPHA Russian Long Range Navigation System receiving in Macedonia with MiniWhip)

Receiving ALPHA signals with RTL-SDR in Macedonia. ALPHA is Russian long range radio navigation system on VLF. Here is presented how it is received with RTL dongle with UpConverter and with home made Mini-Whip active antenna. Presented video was recorded in the middle of the sunny day, about 12 o`clock local time in July 2014. Mini-Whip is surprisingly good antenna. Especially for VLF, LF and HF, comparing with dipole antenna, Delta loops, Long Wire -antennas and similar... Receiving system presented here is very, very cheap. RTL-dongle is actually made for DVB-T USB Receiver, but combined with one of the many free SDR software from the internet, one can get a very good cheap software controlled receiver from 24 MHz to almost 2 GHz. With upconverter (which is also cheap item) You can receive radio signals from 1 KHz to 2 GHz. All kind of modulation: AM, FM, FM-Stereo, WFM, NFM, SSB, USB, LSB, CW.... (with other software, you can decoding all kind of digital signals too...(even GSM) :-) Mini Whip is excellent and cheap DIY active antenna. Especially for lower frequencies! (VLF up to lower HF bands) Some people who report poor performance of this antenna did not followed the rules of proper installation! Grounding the outer conductor (shield) of the coaxial cable has to be done properly! Coaxial cable is part of Mini-Whip antenna and collect a lot of RF noise. You can treat Mini-Whip antenna as a vertical antenna feeding at the top where the impedance is very high. Outer conductor of the coaxial cable must be grounded at the bottom of antenna, where the coaxial cable touching the ground, and the second grounding have to be done at the point just before coaxial cable entering in the house. The RF isolating transformer is recommend also. In that way receiver ground is not physically connected to antenna ground but it is galvanic isolated from outer shield of coaxial cable. All this measures is not difficult to implement and cost almost no money, but the benefit is clear, noiseless VLF and HF reception! Mini-Whip antenna must be placed as far as possible from houses, buildings and power lines! Here is the link of my Youtube video, with schematics of the Mini-Whip and Power supply (power inserter, or Bias-tee for powering the antenna thru the coaxial cable):    • Mini Whip Active Antenna   73 from Z33T