COAXIAL CABLE – ATTENUATION & POWER HANDLING CALCULATOR
Great On-line Calculator from Times Micro Wave:
Sample:
Recent Posts
3StQ5L quad 3 elements 5 band full size
Table EZNEC simulation, gain and F / B in free space and real space to a wavelength from the ground Technical specifications Feed specification* *th... Read more
The K7RA Solar Update – 10/05/2018
Sunspots Sunspots finally returned on September 29, after over two weeks with none. Average daily sunspot numbers increased from 0 to 9.6, and average... Read more
How To Use An Antenna Tuner
How To Use An Antenna Tuner Read more
FT-8 Digital Mode Has Taken Over The HF Bands!
“Finally got my antenna back up today, decided to take a browse through the bands. There is a ton of FT-8 to be had on all the HF bands. Don... Read more
NASA captures incredible solar activity on our Sun in stunning detail
AT more than 90million miles from Earth, it is hard to believe you can watch activity on our huge Sun in such incredible detail. Read more
Radio station in 3-wheel bike – OH7OL
Mobile amateur radio station (CW) built in to a tricycle. Owner is OH7OL (83 years old). -tranceiver Kenwood TS-130S -currently works on 20 meter and... Read more
DB1NTO APRS Transceiver
DB1NTO APRS Transceiver After a few months of development, I can now imagine the presumably world’s smallest APRS transceiver. It is not only ab... Read more
LimeSDR Mini
An open, full-duplex, USB stick radio for femtocells and more The LimeSDR Mini development board is a hardware platform for developing and prototyping... Read more
Nominations Solicited for Six ARRL Awards
The ARRL invites nominations for awards that recognize educational and technological pursuits in Amateur Radio. Nominations are also open for ARRL’s p... Read more
How to install a Horizontal Waller Flag antenna at 150 foot
The Horizontal Waller Flag antenna is a produced and sold by Carlos N4IS http://top-beam.com/ The boom on this one is 44 feet long. Interlaced... Read more
M2 Antenna 1330LP11 – HF Log Periodic
HF Log Periodic SPECIFICATIONS: Model 10-30LP12 Frequency Range 10.0-30.0 MHz Gain 6.8 dBi / 11.6 dBi @ 45′ Front to Back 20 dB Typical Usable R... Read more
Understanding and eliminating RF Interferences caused by your home devices by NK7Z
This is part II of a multipart series on removing RFI from your world. Part one can be found here. Once I discovered that I had RFI, it was time to... Read more
Inter-American Proposal Removes 47 – 47.2 GHz from Bands under Study for 5G Services
The 34th meeting of the Inter-American Telecommunication Commission (CITEL) Permanent Consultative Committee II (PCC.II) concluded a week of meetings... Read more
40 Meters 4-element Wire Yagi by VE3VN
Read great article from VE3VN – 40 Meters 4-element Wire Yagi : Read more
Antenna Dinamica 3el Yagi 6 to 40 meters
Price 2790 Euro See More Antenna Dinamica: Link Read more
LNR FX-4A QRP HF Transceiver
QRP HF Transceiver LNR is pleased to announce the FX-4a. This unit replaces the original FX-4 that we introduced in 2013. The original FX-4 was an exc... Read more
Wireless Power Transmission Provokes Discussion in ITU-R Study Group
The emerging wireless power transmission (WPT) technology and associated applications came in for closer scrutiny during the May/June meeting of Inter... Read more
Solar Storm Forecast 02-04-2015
Dr. Tamitha Mulligan Skov Solar Storm Forecast 02-04-2015 Read more
