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Get your first HAM Radio FCC license ( Technician Class ); all privileges above 50 MHz ( VHF & UHF) ----- Get your second HAM Radio FCC license ( General Class ); All operating modes & majority of the amateur spectrum below 30 MHz ( HF ) ----- Get your third and final HAM Radio FCC license ( Extra Class ); ALL privileges ( frequencies & modes ) granted to Amateur Radio Operators.                                   Visit VE3EN's SolarHam.net for complete Solar Data of interest to HAMS.


KV4P HT FOR ANDROID


kv4p HT is a homebrew VHF radio that makes your Android phone capable of voice and text communication completely off-grid with at least a Technician class amateur radio license.

The radio simply plugs into the USB C port on your Android smartphone and transforms it into a fully-fledged handheld radio transceiver. It's completely open source (GPL3): the Android app, ESP32 firmware, PCB designs, and 3D printer files.

It's small enough to fit in your pocket and take anywhere, and since it has no internal battery it's the perfect radio to put in a go-bag or your car's glove compartment.

NOTE: kv4p HT is an open source project you build yourself and has absolutely no warranty, or guarantees on functionality or reliability! That said, have fun. :


Features:

  • Inexpensive to build, with just a few components to solder
  • 100% ham radio, always completely off-grid
  • Crystal-clear audio, with filters and squelch
  • Texting with notifications just like SMS -- radio-based APRS messaging (not just location) with built-in 1200 baud modem
  • Scan through unlimited memories and groups
  • No battery means nothing to charge except your phone
  • 1 watt transmit can go miles yet sips your phone's battery
  • Automatically find nearby repeaters using GPS
  • Accessibility options: live closed captions (on supported phones), turn off animations, sticky PTT with haptic feedback
  • The app requires Android 8 or higher, which came out in 2017 and pretty much all phones with a USB C connector will have.
Fully assembled kits, with cable and case, can be obtained from Amazon KV4P HT for those who don't desire to DIY from a kit or raw parts.

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Go to KV4P's website as linked to at the beginning of this page; and go to KV4P's YouTube channel here.




N0NBH
Understanding
Propagation

Real time Day/Night image below courtesy of FOURMILAB


Earth Day-Night Map



Solar Data & Images below courtesy of N0NBH



Solar-Terrestrial Images and Data on this site are courtesy of:

Data for VHF Conditions is from DXrobot - Gouda , Make More Miles on VHF , and Andy (G7IZU) (all used with permission).

Data for Solar Flare Probability is from University of Bradford (used with permission).

Data for solar data and conditions from NOAA SWPC , solar flux from Space WX Canada , solar images from NASA , and world map/globes/solar system from FOURMILAB (credit given).


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