The APRS-K1 cable allows a handheld two-way radio to be connected to a mobile device, including iPhone, iPad, and Android.
One end of the cable uses a Kenwood-type K1 connector, and the other end is terminated with a TRRS connector.
App-based
The APRS-K1 cable uses a virtual TNC, which can be found in several apps, such as APRSDroid, APRS.fi, and Pocket Packet. Connect the cable, turn on VOX, and you're done.
Product description
The APRS-K1 cable is a simple way to start using APRS with devices you already own. The APRS-K1 cable quickly connects the radio to APRS via a virtual TNC (controlled by an app) on your tablet or device. The APRS-K1 cable is built with a custom PCB that automatically adjusts the audio for clear packet transmission with minimal adjustment, along with protecting devices from strong, over-modulated signals.
In addition to enabling APRS functionality, the APRS-K1 cable can provide a simple interface gateway, enabling several radio functions!
Easy recording of radio conversations:
By connecting the APRS-K1 cable to the radio and any recording device (line input).
Use the APRS-K1 cable as a microphone input connector:
Set up the VOX function on your radio to accept any form of incoming audio - for example, a Push-to-talk app on your phone - or a Line-Out app from a computer.
Use the APRS-K1 cable to transmit audio through a speaker system:
Easily play audio through an intercom or speaker system from a pocket device.
With a spare two-way radio and a bit of ingenuity, the APRS-K1 cable can serve as an interface for various applications for any amateur radio operator. Compatible with two-way radios with a Kenwood K1 connector (such as BaoFeng, Wouxun, TYT). Compatible with all phones, tablets, and computers with 3.5 mm audio input/output ports
Watch TV images from the ISS
Another use for the APRS-K1 would be receiving SSTV satellite transmissions. SSTV images are periodically transmitted from the ISS. Using the APRS-K1 cable and appropriate software to connect to a tablet or iPhone, you can receive these SSTV images.
Here is a link to: ISS TV (SSTV) - https:/amsat-uk.org/beginners/iss-sstv/
IMPORTANT:
Some phones do not have mechanical detection of a plugged-in cable; instead, they rely on impedance changes or noise from the microphone built into the headset, which is why some customers may experience issues.
The solution is to install the 'Lesser AudioSwitch' app (https:/play.google.com/store/apps/details?id=com.nordskog.LesserAudioSwitch&gl=PL) which forces the use of the jack socket and enables APRS communication on phones, including those in the Samsung Galaxy family.
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