Feld Hellschreiber vs SDR

Hellschreiber is a teleprinter system, developed in the 1920s, that transmits text via sound, much like an old facsimile (fax) system. Each pixel of a character is transmitted as a short burst of audio. It works even under very noisy and poor reception conditions, because your brain does the work of analyzing the received image to pick out the characters. It was used by the German military during World War II to send messages encrypted by ENIGMA machines. Today it is used by amateur (ham) radio operators around the world to send messages to each other via shortwave radio. Feld Hellschreiber literally means "bright field recorder". Hellschreiber is sometimes referred to as simply Hell. Feld Hellschreiber lets you decode and transmit Feld Hell messages. Decoded text is continuously scrolled across the top of the display. You can type in text to transmit, or press a button to easily send canned text messages, such as CQ calls. Sound is picked up from your radio's speaker via the internal mic in your device, and transmitted audio comes out the speaker - you can also connect a patch cable to your radio's mic input via the headphone jack on your device to transmit the audio, if you wish. The slider control adjusts the display contrast, and the indicator to the right shows the volume. Adjust the slider for the best display. To transmit text, touch on the text entry field, and start typing. Each character will be sent when possible. When sent, it will be taken off the left end of this field, and displayed on the right end of the transmitted text field, to the left of the entry field, in a scrolling fashion. Canned text buttons are also available, touch one to send the text stored for that button. To edit a button, touch the Setup button, and then select the button you wish to edit. You can edit the name of the button, as well as the text. To decode transmissions, you just need to run the app, and set it near the radio's speaker or headphones, and watch the decoded text appear. It's that easy!

Software Defined Radio Client for Icom Transceivers and your iPad SDR-Control is a full featured iPad App to operate your Icom Transceiver at home or from around the world without additional Hard- or Software. Important: This App requires one of the following Icom Transceivers: IC-705, IC-7610, IC-9700, IC-7760 or the IC-R8600 Receiver or the new IC-7300 MK2 FACTS AND FEATURES: ■ Native iOS 26 app, backward compatible to iOS 17 ■ Compatible to any new Silicon M or older CPUs ■ Complete operation of your Icom Transceiver in all modes ■ Use the App local or to remote access of your Transceiver from any place without additional Hard- or Software ■ Dual VFO support (single Waterfall) ■ DualWatch support (Audio from both VFOs at the same time) ■ Logbook with auto logging, ADIF Im-/Export ■ UDP Log submission when using external logging software ■ Integrated full featured FT8 / FT4 Tool ■ Integrated SSTV receiver (NEW) ■ Integrated CW Decoder (NEW) ■ Integrated APRS Tool (NEW) ■ Integrated CW Keyer ■ DX-Cluster integration ■ Spots (from FT8, DX-Cluster) will be displayed in Waterfall ■ Band limits and Band-Modes will be displayed in Waterfall ■ Call sign lookup integrated ■ Displays Calls on Map with heading and distance information ■ MIDI Controller support ■ Keyboard shortcuts ■ And much more... WHAT YOU NEED: - An Icom IC-705, IC-7610, IC-9700, IC-7760 or IC-7300 MK2 Transceiver or IC-R8600 Receiver - The Transceiver needs to be connected to your Network (WiFi or LAN) - No USB cable needed or supported - An iPad that runs at least iOS 17 Find out more here: https://ham-radio-apps.com Read the Manual: http://go-to.me/sdrcontrol-ios-manual