HamAntCal+ vs RadioMail Usage & Stats

HamAntCalplus Version 1.5.5 (Ham Antenna Calculator Plus) will simply and intuitively calculate for you the starting length needed for constructing your antennas in feet/inches or in metric. It will calculate the starting length for "Dipole's", "Inverted Vee's", "Vertical's" and has a page for calculating 1/8, 1/4, 1/2, 5/8 and "Full Wave" length. HamAntCalplus is designed to work on the iPad as well as the iPhone. In this update: ▪Updated for iPhone X. ▪Updated “Inverted Vee” with slider for height of the ends above ground. ▪This update requires iOS 8.2 and above. ------------------------------------- ▪ Will calculate to feet/inches, feet with a decimal point or inches only below 10 ft if desired as well as metric. ▪ Just swipe to the left to access up to 6 saved antenna calculations for each antenna type. ▪ You can calculate for the length of an antenna in free space. ▪ Enter a high and a low frequency in a band and calculate for a frequency centered between the 2 frequencies entered. ▪ A diameter slider lets you enter antenna element diameters up to 1” to adjust for antenna element length based on the diameter of the element. ▪ I have come across a lot of different and conflicting information for calculating the length of an "Inverted Vee" antenna. Some say subtract 2 to 5 percent based on the angle of the wires. Others say to add a percentage based on the angle of the wires down from horizontal. I decided to test this before releasing this app. First I calculated for a "Dipole" using the "Dipole" calculator. Then I put together a "Dipole" with a support for the center insulator as well as the ends. I measured the resonant frequency with an antenna analyzer. Then I brought the ends down towards 45 degrees from horizontal. As the ends were lowered the resonant frequency increased. This means that the length of the "Inverted Vee" would need to be increased to stay resonant at the same frequency as the dipole. The "Inverted Vee" calculator has a slider that starts up with an angle of 45 degrees and can be adjusted down to 20 degrees continuously re-calculating as it is moved. This corresponds to about 4.5 to 2 percent added to the length of the "Inverted Vee". ▪ No antenna calculator can give exact results in every case. Much will depend on the wire used, the height above ground, the ground itself, nearby objects, etc…. It's always a good practice to add a little extra wire and then trim up to the desired frequency. ▪ This calculator will calculate from 30 Khz to 500Mhz for the "Dipole", "Vertical" and "Length" calculators. The maximum for the "Inverted Vee" calculator is 60MHz. ▪ This calculator does not give exact measurements and the results will need to be trimmed using an antenna analyzer or SWR meter to the exact frequency after installation. Leave some extra wire on each section for trimming and wrapping around the insulators. ▪ Keep in mind that there are a lot of factors that can affect the resonant frequency of an antenna. At VHF and above even a small change in the length or diameter of an element can make a large change in the resonant frequency of an antenna even more so than at lower frequencies. This calculator just provides the starting length for building an antenna and proper matching methods will need to be used. ▪ Please be safe while building your antennas. Always use the proper safety equipment. Never build your antenna where it can come in contact with power lines, this includes the supports as well as the antenna itself and feed lines. BE SAFE! ▪ Although I have had good results using this calculator the results are not guaranteed. Always add some extra length and trim the antenna to frequency (it's easier to trim than it is to add wire to the antenna). Please feel free to contact me with suggestions, problems, compliments, ideas for improvements or additions to HamAntCalplus. Your ratings are appreciated.
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RadioMail provides access to the Winlink amateur radio email system. Compose, read, and reply to messages from anywhere. A valid amateur radio license is required to use this app. NETWORK ACCESS・Send and receive messages via telnet using the main Winlink server or through the Amateur Radio Emergency Data Network (AREDN). RADIO ACCESS・Pair your device with a VARA or KISS TNC packet modem using WiFi or Bluetooth. Packet mode supports the Kenwood TH-D74 and TH-D75 radios via the B.B. Link bluetooth adapter, the Mobilinkd TNC3/4, the PicoAPRS radio, and the DireWolf software TNC. Configuration of up to two digipeaters is possible for packet or VARA FM mode connections. Note for VARA: An operational version of the VARA modem must be available on a separate computer. BUILT-IN PACKET MODEM・Connect to packet stations via the internal 1200 baud AFSK modem using compatible audio interfaces like the DigiRig Lite or DigiRig VOX cable. STATION DIRECTORY・Automatic retrieval of station details from Winlink, organized by proximity to your current location. Custom stations can be added for peer-to-peer connections. Note: Peer-to-peer connections are only outbound. FAVORITES LIST・Save stations to your favorites list for quick access by modes and bands during connection initiation. PHOTO ATTACHMENTS・Sharing photos is easy with RadioMail. Access your device's camera directly or attach photos from your library. The app optimizes images to reduce transmission time. Preview and annotate received attachments, save to local folders or iCloud, or share via other apps. FORMS・Compose and view 100+ standard Winlink forms. Forms are kept current with automatic updates. GPS coordinates are pre-filled according to user location. Received forms can be shared or printed as PDFs. Custom specialized forms can be installed by importing a zip file. Note: Form access is an optional premium feature requiring an in-app subscription. POSITION REPORT・Utilize your phone's internal GPS for accurate location data in position reports, which are posted to the Automatic Packet Reporting System (APRS) network. NOTIFICATIONS・RadioMail fetches new messages automatically and shows notifications while running in the background, eliminating the need to constantly check for new messages. Note: This feature is only available for telnet connections. ADDRESSES・Send or receive messages with your primary Winlink account, tactical addresses, or secondary accounts. Seamlessly send messages to Winlink and regular email addresses. Look up contacts from the address book and access their email addresses when composing messages. RadioMail is independently developed and not affiliated with the Amateur Radio Safety Foundation, Inc. (ARSFI) who supports the Winlink Global Radio Email system. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
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HamAntCal+ VS.
RadioMail

January 17, 2025