Ham Radio Nation - Amateur Radio Social Network

AN/PRC-70 Japan Military Radio Club HAM RADIO AN/PRC-70 is a modern solid state radio. It is one of the first and few radios, covering as well HF as the tact...

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Radio Electronics: Frequency Modulation Basic Principles pt2-2 1964 US Army Training Film

Length: 10:35 - Rating: 5.0 (26 ratings) - View: 4952 - Author: Jeff Quitney

more at http://scitech.quickfound.net/ FUNDAMENTALS OF AM AND FM RADIO COMMUNICATION, HOW FM ELIMINATES PROBLEM OF ELECTRICAL INTERFERENCE, FUNCTIONING OF FM...

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Sounds of HF Radio - Digital Modes and other Unusual Sounds

Length: 7:2 - Rating: 4.7419353 (62 ratings) - View: 9629 - Author: Gough Lui

As a follow on from my previous video introducing the SDR, here is a collection of various digital modes used by utilities, mariners and amateur radio users....

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PX-888 ANI usage

Length: 3:41 - Rating: 4.5 (8 ratings) - View: 7746 - Author: Tony Ling

A demonstration of FSK on the PX-888. FSK (Frequency Shift Keying) is used with many radios to perform the ANI function which announces to other radio users ...

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27.650 MHz - 11 meter opening 10 Feb 2012

Length: 1:11 - Rating: 0 (0 ratings) - View: 23 - Author: R4002

Possibly military frequency.

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Hammerlund HX-500 Transmitter with HQ-170AC/VHF Receiver

Length: 8:47 - Rating: 5.0 (3 ratings) - View: 1196 - Author: qtrmiler1

Very rare Hammerlund HX-500 transmitter. Less than 600 built in 1962. This one is serial number 525. It covers 80-10 meters and operates in CW-LSB-USB-DSB-FS...

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Explorer1 Prime Unit2.wmv

Length: 0:41 - Rating: 0 (0 ratings) - View: 55 - Author: Canale di IW2DZX

Explorer1 Prime Unit-2 437.505 FSK 1200 BPS.

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Data on 11 meter band - SSB voice vs data 27.455 USB

Length: 1:31 - Rating: 1.0 (1 ratings) - View: 294 - Author: R4002

Possibly a military or pirate radio data signal on top of SSB voice communications traffic from Latin America.

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Russian submarine transmitter 18.1kHz

Length: 0:38 - Rating: 4.618421 (76 ratings) - View: 95547 - Author: SM4WII

Russian submarine transmitter on 18.1kHz comming in really strong to my receiving loop for 10-20kHz. I also use a LF to 4MHz konverter.

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Testing TR4W + Router v.0.77 (MicroHam) + Micro KEYER II

Length: 4:39 - Rating: 0 (0 ratings) - View: 266 - Author: RV3DHC's YouTube Videos

Testing TR4W + Router v.0.77 (MicroHam) + Micro KEYER II + YAESU FT-1000MP Mark-V Field.

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LF/VLF scan

Length: 3:6 - Rating: 4.5833335 (12 ratings) - View: 9153 - Author: iw3fzq

LF/VLF band scan between 3 and 150 kHz during last Field Day. Equipment was a 100 mt long wire, homemade converter (SO42P mixer) and Yaesu FT817 (I.F. 28 MHz).

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