Сайт «YouTube — Mile Kokotov»

Receiving LW AM Broadcast band in Macedonia with RSPdx [00:04:46]

As you can see and hear in this video, reception of the Long Wave AM Broadcast radio stations with SDRplay RSPdx is excellent. The sound is crisp, clear and very good thanks to the large HDR capabilities of RSPdx receiver and SDRuno software DSP features, with a large number of predefined filters and opportunities for their customization also. The video practically shows how filters can be manually adjusted to avoid interference from the neighboring very strong signals in adjacent channels, giving a much better sound to the desired radio station. Watch the video and see for yourself, especially in the second half of the video, where I am playing with filters and adjusting them according to situation...
The Receiver is SDRplay RSPdx, and antenna is homemade Mini-Whip active antenna, only 10 cm long, mounted on a 6-meter high plastic telescopic mast.

CQ WW DX CW Contest 2019 Receiving with SDRplay RSPdx on 14MHz [00:07:55]

CQ World Wide DX CW Contest receiving with SDRplay RSPdx receiver on 20 meters band. Plenty of signals here in Macedonia, with excellent conditions and brilliant SDR-receiver. In the middle of the contest, In very difficult conditions for any receiver, RSPdx was a real pearl, extracting weak DX-signals very successfully. Watch the video and see for yourself. You can see and hear many DX-stations from all over the World, received at my home in Macedonia. On this video I am using Mini-whip active antenna, which I made it myself.

The New SDRplay RSPdx receiver — First Impression: Excellent! [00:07:01]

Today i have received the new SDR receiver from SDRplay, the RSPdx and was eager to turn it on and do some tests receiving on HF and VLF. Although at the moment my mini-whip antenna is not operational, I have connected some 20 meters wire as an antenna and start listening on VLF, LW, MW and HF...
I have to say that SDRplay team did a good job with this SDR-receiver, putting better filters and redesigning front-end to improve dynamic range and enhance overall performance in relation to its predecessors RSP2 and RSP2pro. The new RSPdx is very good indeed. Especially on HF and below.
The RSPdx has new features like HDR (High Dynamic range) mode for reception within selected bands below 2 MHz. HDR mode delivers improved intermodulation performance and less spurious responses for those challenging bands.

Automatic Programmable Beacon 4kHz to 225 MHz with Arduino & Si5351 [00:03:32]

This is Programmable Automatic Radio Beacon made with Arduino NANO and Si5351 chip.
The RF output power is only about 10 mW, but it can be increased with additional RF amplifier.
Can be programmed to transmit in 4 kHz up to 225 MHz frequency range, with different speed of Morse keying and any transmitting message ...
It is very cheap! The material cost is only about 5 US dollars !

RSPduo in CW CQ WPX Contest 2018 [00:05:24]

The New SDRplay RSPduo Dual tuner SDR-receiver, receiving CW in CQ WPX Contest 2018. This excellent SDR-receiver can receive in single tuner or dual-tuner mode, so you can monitoring or recording any two bands simultaneously. It is perfect option for 2-band monitoring in Contest for example...

SDRplay RSPduo — The Cherry on the Cake — Short Review [00:04:31]

RSPduo is a new SDR receiver from SDRplay. The RSPduo is a dual-tuner wideband 14-bit SDR receiver which covers the entire RF spectrum from 1kHz to 2GHz giving up to 10MHz of spectrum visibility.
Combined with the SDRuno software, this SRD receiver with its two totally independent tuners, can simultaneously receiving, monitoring and recording two separate 2MHz bands of spectrum, anywhere between 1kHz and 2GHz.
In single tuner mode, RSPduo can receive, monitor and record up to 10 MHz of spectrum at a time.
The RSPduo provides three software selectable antenna inputs. All it needs is a PC and an antenna to provide excellent communications receiver functionality.
The RSPduo Covers all frequencies from 1kHz through VLF, LF, MW, HF, VHF, UHF and L-band, up to 2GHz, with no gaps.
This quality SRD receiver has 14-bit Analog to Digital Converter with excellent dynamic range, and definitely it is not another 8 bit USB-dongle

РАДИОАМАТЕРСТВО — Хоби за 21 век [00:05:55]

This is excellent RSGB video "Amateur radio - a 21st Century hobby"
I have just translated it to Macedonian language.
Great for Amateur radio presentation and introduction to youngsters

Z33T Radio Beacon Automatic Keyer PIC16F84 [00:03:17]

This is Programmable Automatic Radio Beacon Keyer with PIC16F84 microcontroller.

Airspy HF+ vs SDRplay RSP1A Comparison on FM Broadcast Band [00:10:57]

In this video I am comparing two popular SDR-Receivers (Airspy HF+ and SDRplay RSP1A) on FM Broadcast Band.
I have made few recordings with every receiver with the same antenna trying to set the best SNR = signal-to-noise ratio.
My intention was to ensure the same conditions for both SDR`s in order to make as fair as possible comparison.
No DSP enhancing on the SDR`s was used.
Antenna was Vertical Dipole.

When receiving signals are strong enough, You should not expect the difference between most receivers to be very obvious!
If you compare one average transceiver (which cost about $ 1000 USD) and top class transceiver which cost ten times more, the difference in receiving average signals will be very small too. Almost negligible! But when you have difficult conditions, the very weak signal between many strong signals, than the better receiver will receive the weak signal readable enough, but cheaper receiver will not. Today it is not a problem to design and produce the sensitive receiver, but it is far more difficult to design and produce high dynamic receiver for reasonable price! The Airspy HF+ and RSP1A are very very good SDR-receivers. They have different customers target and have strong and weak sides. For examle Airspy HF+ has better dynamics in frequency range where it is designed for, but RSP1A, on the other hand, has broadband coverage...


VIDEO CONTENT:

00:00 to 00:18 = Intro

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00:18 to 00:48 = RSP1A receiving Very strong signal of Local Radio Station on 106.4 MHz, with 192 kHz WFM Filter.

00:48 to 01:24 = Airspy HF+ receiving Very strong signal of Local Radio Station on 106.4 MHz, with 192 kHz WFM Filter.

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01:24 to 02:01 = RSP1A receiving Very strong signal of Local Radio Station on 107.6 MHz, with 192 kHz WFM Filter.

02:01 to 02:38 = Airspy HF+ receiving Very strong signal of Local Radio Station on 107.6 MHz, with 196 kHz WFM Filter.

02:38 to 02:59 = RSP1A receiving Very strong signal of Local Radio Station on 107.6 MHz, with 192 kHz WFM Filter.

02:59 to 03:21 = Airspy HF+ receiving Very strong signal of Local Radio Station on 107.6 MHz, with 196 kHz WFM Filter.

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03:21 to 03:42 = RSP1A receiving Weak signal of Radio Club FM from Skopje on 103.4 MHz, with 120 kHz WFM Filter, no Noise Reduction.

03:42 to 03:54 = RSP1A receiving Weak signal of Radio Club FM from Skopje on 103.4 MHz, with 120 kHz WFM Filter, Noise Reduction is switched ON.

03:54 to 04:16 = Airspy HF+ receiving Weak signal of Radio Club FM from Skopje on 103.4 MHz, with 120 kHz WFM Filter, no Noise Reduction.

04:16 to 04:31 = Airspy HF+ receiving Weak signal of Radio Club FM from Skopje on 103.4 MHz, with 120 kHz WFM Filter, Noise Reduction is switched ON.

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04:31 to 05:02 = Airspy HF+ receiving Very weak signal of Radio BUM from Kumanovo on 104.2 MHz, with 96 kHz WFM Filter.

05:02 to 05:29 = RSP1A receiving Very weak signal of Radio BUM from Kumanovo on 104.2 MHz, with 120 kHz WFM Filter.

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05:29 to 06:04 = RSP1A receiving Very weak signal of Radio Metropolis from transmitter in Tetovo on 104.3 MHz, with 120 kHz WFM Filter.

06:04 to 06:36 = Airspy HF+ receiving Very weak signal of Radio Metropolis from transmitter in Tetovo on 104.3 MHz, with 120 kHz WFM Filter.

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06:36 to 06:59 = Airspy HF+ receiving Very weak signal of Radio ZONA M1 from transmitter in Skopje on 104.4 MHz, with 120 kHz WFM Filter.

06:59 to 07:25 = RSP1A receiving Very weak signal of Radio ZONA M1 from transmitter in Skopje on 104.4 MHz, with 120 kHz WFM Filter.

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07:25 to 07:47 = RSP1A receiving weak signal of Radio Bubamara from transmitter in Skopje on 105.2 MHz, with 192 kHz WFM Filter.

07:47 to 08:16 = Airspy HF+ receiving weak signal of Radio Bubamara from transmitter in Skopje on 105.2 MHz, with 192 kHz WFM Filter.

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08:16 to 08:48 = Airspy HF+ receiving weak signal of Radio Kanal-77 from transmitter in Coco Peak, near Kladnik village, on 105.5 MHz, with 192 kHz WFM Filter.

08:48 to 09:16 = RSP1A receiving weak signal of Radio Kanal-77 from transmitter in Coco Peak, near Kladnik village, on 105.5 MHz, with 192 kHz WFM Filter.

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09:16 to 09:36 = Airspy HF+ receiving weak signal of Radio Antenna-5 from distant transmitter on 106.9 MHz, with 120 kHz WFM Filter.

09:36 to 09:55 = RSP1A receiving weak signal of Radio Antenna-5 from distant transmitter on 106.9 MHz, with 120 kHz WFM Filter.

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09:55 to 10:26 = RSP1A receiving weak signal of Radio 5-FM from Veles on 107.1 MHz, with 120 kHz WFM Filter.

10:26 to 10:56 = Airspy HF+ receiving weak signal of Radio 5-FM from Veles on 107.1 MHz, with 120 kHz WFM Filter.

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Mile Kokotov, Z33T

SDR Receivers Comparison on VLF, LW and NDB band [00:10:38]

SDR-Receivers Comparison on VLF, LW and NDB-band
*** Airspy HF+, SDRplay RSP1A and ColibriNANO ***
In this video I am comparing three SDR-Receivers. I have made few recordings with every receiver with the same antenna and choose the best one (one with the best SNR = signal-to-noise ratio). My intention was to ensure the same conditions for all three SDR`s in order to make as fair as possible comparison. For example, I was set the frequency span displayed on the window to be as same as possible for all three receivers. The vertical axis for the signal stregth, was set to be equal (in decibels) too.Airspy HF+ and ColibriNANO was set to their minimum sample rate (48 kHz).
RSP1A was set to minimum sample rate (2 MHz and 8 decimation).
No DSP enhancing on the SDR`s was used except APF (Audio peak filter) on ColibriNANO (I forgot to swith off).

VIDEO CONTENT:

00:14 to 00:35 = ColibriNANO receiving VLF ALPHA signal on 14881 Hz (43 kHz frequency span window and 800 Hz CW

filter bandwidth)

00:35 to 01:00 = RSP1A receiving VLF ALPHA signal on 14881 Hz (30.5 kHz frequency span window and 750 Hz CW filter bandwidth)

01:00 to 01:36 = Airspy HF+ receiving VLF ALPHA signal on 14881 Hz (33 kHz frequency span window and 800 Hz CW filter bandwidth)

01:36 to 01:58 = ColibriNANO receiving VLF ALPHA signal on 14881 Hz (23 kHz frequency span window and 800 Hz CW filter bandwidth)

01:58 to 02:25 = Airspy HF+ receiving VLF ALPHA signal on 14881 Hz (23 kHz frequency span window and 800 Hz CW filter bandwidth)

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02:25 to 03:06 = RSP1A receiving LW Broadcast station with very weak modulation on 162 kHz (62 kHz frequency span window and 6kHz AM filter bandwidth)

03:06 to 03:46 = Airspy HF+ receiving LW Broadcast station with very weak modulation on 162 kHz (48 kHz frequency span window and 6kHz AM filter bandwidth)

03:46 to 04:26 = ColibriNANO receiving LW Broadcast station with very weak modulation on 162 kHz (42 kHz frequency span window and 6kHz AM filter bandwidth)

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04:26 to 04:53 = Airspy HF+ receiving NDB (ID = NIK) on 302 kHz (48 kHz frequency span window and 1.2kHz LSB filter bandwidth)

04:53 to 05:22 = ColibriNANO receiving NDB (ID = NIK) on 302 kHz (43 kHz frequency span window and 1.2kHz LSB filter bandwidth)

05:22 to 05:50 = RSP1A receiving NDB (ID = NIK) on 302 kHz (31 kHz frequency span window and 1.2kHz LSB filter bandwidth)

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05:50 to 06:26 = Airspy HF+ receiving NDB (ID = CF) on 346 kHz (48 kHz frequency span window and 0.73 kHz USB filter bandwidth)

06:26 to 06:51 = ColibriNANO receiving NDB (ID = CF) on 346 kHz (43 kHz frequency span window and 0.73 kHz USB filter bandwidth)

06:51 to 07:28 = RSP1A receiving NDB (ID = CF) on 346 kHz (31 kHz frequency span window and 0.73 kHz USB filter bandwidth)

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07:28 to 08:12 = Airspy HF+ receiving NDB (ID = SZA) on 350 kHz (48 kHz frequency span window and 0.73 kHz USB filter bandwidth)

08:12 to 08:46 = ColibriNANO receiving NDB (ID = SZA) on 350 kHz (43 kHz frequency span window and 0.73 kHz USB filter bandwidth)

08:46 to 09:21 = RSP1A receiving NDB (ID = SZA) on 350 kHz (31 kHz frequency span window and 0.73 kHz USB filter bandwidth)

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09:21 to 09:48 = Airspy HF+ receiving NDB (ID = BIA) on 474 kHz (48 kHz frequency span window and 1.2 kHz LSB filter bandwidth)

09:48 to 10:12 = ColibriNANO receiving NDB (ID = BIA) on 474 kHz (43 kHz frequency span window and 1.2 kHz USB filter bandwidth)

10:12 to 10:37 = RSP1A receiving NDB (ID = BIA) on 474 kHz (43 kHz frequency span window and 1.2 kHz LSB filter bandwidth)

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73,
Mile Kokotov, Z33T

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