freq

748 links - and 15 categories

CobWeb multiband folded dipole - The cobweb antenna it is basically a 5 band antenna comprising of 5 full half wave dipoles for each band - between 10 meters and 20 meters, the antenna is also resonant on 6M and can be modeled even for VHF frequencies.
[ Hits: 8631 | Votes: 0 | Rating: 0 ]

Making a half wave coax cable - How to make a half l or quarter l coax cable for a specific frequency
[ Hits: 1428 | Votes: 2 | Rating: 5.5 ]

Antenna Impedance measurement - When experimenting on an antenna it's often important to determine its feedpoint impedance at various frequencies across the operating band. It's easy enough to measure SWR, but sometimes we need to know more detail than this
[ Hits: 1426 | Votes: 6 | Rating: 2.67 ]

Multi Band Antenna Traps - These devices are called Traps, but they are actually more like frequency sensitive switches. They are parallel resonant, high Q, tuned circuits which provide a very high impedance at their frequency of resonance.
[ Hits: 4851 | Votes: 3 | Rating: 6 ]

The FD4 (FD3) Windom Antenna ^pop - The 4-band Fritzel model FD4 is a special version of a Windom antenna. It is a half-wave long on the lowest frequency, and is fed from a coax cable through a transformer inserted in the wire at one-third from one end
[ Hits: 53320 | Votes: 95 | Rating: 5.42 ]

Southern California Repeater and Remote Base Association - SCRRBA is a volunteer organization providing coordination of a number of heavily utilized amateur radio frequency bands in Southern California.
[ Hits: 741 | Votes: 0 | Rating: 0 ]
220 MHZ Spectrum Management Assn - Amateur radio spectrum management and frequency coordination entity for 219
[ Hits: 756 | Votes: 0 | Rating: 0 ]

Comtechpst.com - High Power RF Amps - Comtech PST offers solid-state power amplifiers in frequency ranges from 1 MHz through 3.6 GHz, with output power levels ranging from 5 watts to over 30 kW
[ Hits: 3174 | Votes: 3 | Rating: 7.33 ]

Madell Technology Corporation - Makers of oscilloscopes, spectrum analyzers, frequency counters, power supplies and more testi equipment products
[ Hits: 1103 | Votes: 4 | Rating: 5.5 ]
ACE-Co Frequency Counters - Handheld radio frequency counters (1Mhz-3GHZ)
[ Hits: 577 | Votes: 1 | Rating: 10 ]

FDMDV - Digital Voice - FDMDV - Frequency Division Multiplex Digital Voice Digital Audio over HF SSB. FDMDV is the latest digital voice mode on HF - it caters to high quality digital voice under poor band conditions, in only 1100Hz bandwidth
[ Hits: 5520 | Votes: 6 | Rating: 7.83 ]

TSC Ferrite International - TSC International is a manufacturer of magnetic materials for all frequencies
[ Hits: 804 | Votes: 1 | Rating: 1 ]

glfer - glfer is a program for reception and transmission of QRSS/DFCW signals. It is composed of two main parts: the spectrogram window, where you can see the spectrum of the received signal vs. time the transmission functions, to emit cw characters at a slow but precisely controlled speed, using the QRSS (slow CW) or DFCW (Dual Frequency CW) modes
[ Hits: 1823 | Votes: 0 | Rating: 0 ]

DTMF decoder - A very easy to use program to decode DTMF dial tones found on telephone lines with touch tone phones. The DTMF Decoder is also used for receiving data transmissions over the air in amateur radio frequency bands.
[ Hits: 7949 | Votes: 14 | Rating: 4.79 ]

Ham Fan - A free small database program for Palm OS that allows you to log ham radio contacts. You can log the call sign, name, date, time and frequency of the contact.
[ Hits: 851 | Votes: 0 | Rating: 0 ]

Radio Control Program ARCP-480 - This free software is an application solely for the use of controlling the Kenwood TS-480. Can be used to edit, save, and export to the TS-480 information such as Memory, Menu, and Auto Mode frequencies.
[ Hits: 2159 | Votes: 2 | Rating: 9 ]
HugeIcom - This is a very simple program which helps visually handicapped people to see the frequency and mode of the rig. Or maybe it's useful for demos, trade shows or similiar. It will work with any Icom except the IC-735.
[ Hits: 1172 | Votes: 1 | Rating: 10 ]
RadioComm - RadioComm can be used to program your Icom radio's memory, or to create nice radio-frequency spectra (see above) or to interface your radio to a huge database of frequencies.
[ Hits: 24680 | Votes: 32 | Rating: 6.2 ]
Virtual Legacy Radio - Windows remote control for Yaesu or Icom. Displays the current transceiver settings frequency, mode, and others on the PC in an old-fashioned way that corresponds to the look of receivers in 70's. DX-Cluster Watch (DCW) is an application that automatically refreshes a web page with the dx-cluster content, parses spot lines from it, keeps a consolidated list and inserts the spots to VLR as frequency markers by OK1FIG
[ Hits: 1847 | Votes: 6 | Rating: 10 ]

Using RG-174 Coaxial Cable - Notes on using RG-174 Coaxial Cable at Medium and Lower HF Frequencies by John Bryant and Bill Bowers
[ Hits: 931 | Votes: 4 | Rating: 4.25 ]