Amateur Radio News
Displaying articles 1 - 10 of most recent articles
Some secrets of Common Mode Chokes revealed
Antennas/Feed Lines/ChokeThis is a small collection of K9YC info and my experiences. Problems by feed lines of 1/2 lambda length. CMCs in transmitting and receiving systems. Antenna unbalance, Maximal allowed power, Choke winding tips.
The DXZone | 11 hours, 5 minutes ago | comment? | recommend
The DXZone | 11 hours, 5 minutes ago | comment? | recommend
Museum Ships On-the-Air Weekend
If you like ships and are an amateur radio operator, 100 ships will be on the air from June 3 - 4 for the annual Museum Ships Weekend event.Organizers stress that this is not a contest, but a fun event that begins at 0000Z on June 3, 2023, and runs throug
ARRL | Jun 2, 2023 6:10 PM [GMT] | comment? | recommend
ARRL | Jun 2, 2023 6:10 PM [GMT] | comment? | recommend
The K7RA Solar Update
Average daily solar flux values dropped over the past week, butsunspot numbers were nearly the same, comparing May 25 to 31 to theprevious week.Average daily solar flux declined from 161.2 to 155.3. Geomagneticindicators were quieter, with average daily p
ARRL | Jun 2, 2023 5:29 PM [GMT] | comment? | recommend
ARRL | Jun 2, 2023 5:29 PM [GMT] | comment? | recommend
ARRL Elected to Serve on SAFECOM
ARRL The National Association for Amateur Radio has been elected to serve on SAFECOM. SAFECOM is a group of national thought leaders and officials within the emergency communications and response space that works to set standards used at every level. The
ARRL | Jun 2, 2023 1:55 PM [GMT] | comment? | recommend
ARRL | Jun 2, 2023 1:55 PM [GMT] | comment? | recommend
Estimated International Sunspot Number
Propagation/SunspotsThe estimated international sunspot number (EISN) is a daily value obtained by a simple average over available sunspot counts from prompt stations in the SILSO network.
The DXZone | Jun 2, 2023 07:27 AM [GMT] | comment? | recommend
The DXZone | Jun 2, 2023 07:27 AM [GMT] | comment? | recommend
He Touched So Many Lives Chip Margelli, K7JA
The airwaves are markedly dimmer this week, social media is filled with heartfelt tributes, and industry leaders are mourning. Longtime fixture of amateur radio Charles Chip Margelli, K7JA, passed away after a brief illness. Margelli was an ARRL Life Memb
ARRL | Jun 1, 2023 3:53 PM [GMT] | comment? | recommend
ARRL | Jun 1, 2023 3:53 PM [GMT] | comment? | recommend
Short receiving loop antenna
Antennas/ReceivingThis page is a project for a small loop antenna for reception of short wave broadcasting.It is in Portuguese and contains pictures and schematics to build your own antenna
The DXZone | Jun 1, 2023 07:38 AM [GMT] | comment? | recommend
The DXZone | Jun 1, 2023 07:38 AM [GMT] | comment? | recommend
FT-817 internal battery power Fix
Radio Equipment/HF Transceivers/Yaesu FT-817If your FT-817 has stopped powering up from the internal battery but works from external power, then maybe the internal battery fuse has blown.There is a small PCB mounted fuse to protect the battery and radio.
The DXZone | May 31, 2023 07:32 AM [GMT] | comment? | recommend
The DXZone | May 31, 2023 07:32 AM [GMT] | comment? | recommend
Shortened 30m Dipole
Antennas/30MThis article describes the construction of a 9,50 m long dipole for the 30 m band (10.1 MHz to 10.15 MHz). It was designed to be mounted ca. 6m above ground inside an attic. The calculations were performed by OE1MEW
The DXZone | May 30, 2023 11:28 AM [GMT] | comment? | recommend
The DXZone | May 30, 2023 11:28 AM [GMT] | comment? | recommend
Mains RF Filter
Technical Reference/Radio Frequency Interference/Noise ReductionIf RF noise threatens to take your hobby away, this could be probably a good solution to reduce or even eliminate RF Noise.
The DXZone | May 29, 2023 07:27 AM [GMT] | comment? | recommend
The DXZone | May 29, 2023 07:27 AM [GMT] | comment? | recommend
