radio freq

radio freq

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• 20 meter short loaded vertical antennas - N4SPP
  
  Loading is a way to lower the resonant frequency of an antenna radiator This technique ...
  [ Hits: 233 | Votes: 1 | Rating: 9 ]

• Baluns and common mode chokes - Dorenberg
  
  Voltage baluns versus Current baluns When to use them differences and typical usage in feeding ...
  [ Hits: 402 | Votes: 1 | Rating: 10 ]
• Choking balun for 160-30 meter band - VK6YSF
  
  Choking balun for lower HF and MF bands 1 8MHz 10MHz Requiring a choking balun ...
  [ Hits: 197 | Votes: 3 | Rating: 6 ]

• Trapped vertical Antenna - F5ZV
  
  This antenna is an omnidirectional and multiband and it is well suited for DX enthusiasts ...
  [ Hits: 360 | Votes: 7 | Rating: 2.71 ]

• HackRF - HackRF
  
  open source hardware for software defined radio HackRF One is an open source hardware platform ...
  [ Hits: 177 | Votes: 3 | Rating: 7.67 ]

• Amateur Radio Microwave - Introduction - W6BY
  
  Introdcution to Amateur Radio Microwave A 21 page presentation of ham radio microwaves concepts for ...
  [ Hits: 420 | Votes: 0 | Rating: 0 ]

• Recognition of CW signs at different listening levels and frequencies - PubMed
  
  The recognition of telegraphy masked by noise at 40 and 80 signs min telegraphy speed ...
  [ Hits: 81 | Votes: 1 | Rating: 7 ]

• Ham Radio: Using Repeaters - ylab
  
  The most basic form of repeater receives communication on one frequency and re transmits at ...
  [ Hits: 92 | Votes: 1 | Rating: 8 ]

• Calculation of the Maximum Usable Frequency - IEEE
  
  This paper presents the method of calculating the maximum usable frequency MUF and field strength ...
  [ Hits: 245 | Votes: 2 | Rating: 5.5 ]

• HF communication prediction tools - BOM
  
  Online HF Communication prediction system provided by the Australian Governament Buerau of Metereology allow to ...
  [ Hits: 169 | Votes: 0 | Rating: 0 ]

• Transforming the Elecraft K3 into a SDR with K3 - N2NC
  
  This article will explain a few of the ways author use an external SDR and ...
  [ Hits: 348 | Votes: 0 | Rating: 0 ]

• Icom 706MkIIG Frequency Calibration - kv5r
  
  Unlike older radios the 706 uses only one crystal oscillator called the Master Oscillator All ...
  [ Hits: 214 | Votes: 2 | Rating: 9 ]

• Speech synthesiser for FT-817 - sarcnet
  
  This construction project is for anyone wanting to give this popular little radio a voice ...
  [ Hits: 125 | Votes: 0 | Rating: 0 ]

• FT991 MARS Mod - FT991
  
  This modification will expand the tx frequency range of the Yaesu FT 991 from allowing ...
  [ Hits: 935 | Votes: 5 | Rating: 3 ]

• LAN-IQ SDR - afedri
  
  Stand Alone Software Defined Radio direct sampling receiver from 30 kHz to 1700 00MHz continuous ...
  [ Hits: 258 | Votes: 1 | Rating: 8 ]

• Scanning frequencies - J Ward
  
  HF digital mode transmissions voice transmissions in HF and VHF Bands collected in several XLS ...
  [ Hits: 140 | Votes: 0 | Rating: 0 ]

• Homebrew a High Performance SSB RTX for 14 MHz - DK7IH
  
  This article describes the construction of a high performance transmitter and receiver for SSB voice ...
  [ Hits: 347 | Votes: 5 | Rating: 7.8 ]

• Experimental HF 6-band SSB transceiver - DK7IH  ^updated
  
  An SSB radio for the HF bands will be presented Featuring 12 to 20 Watts ...
  [ Hits: 773 | Votes: 15 | Rating: 9.34 ]

• Gimme Five - QRP SSB Transceiver - DK7IH
  
  Gimme Five reloaded a compact 5 band QRP SSB transceiver in SMD technology This unit ...
  [ Hits: 287 | Votes: 1 | Rating: 10 ]

• SDR Receiver with RTL-SDR and Gnu Radio - VK3FOWL VK3YSP
  
  This project is a Software Defined Radio Receiver It has a frequency range of 24MHz ...
  [ Hits: 494 | Votes: 1 | Rating: 1 ]

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