G4KLX

Episode 230 - Jonathan naylor - G4KLX

Jonathan Naylor, G4KLX, pioneered the opening, to amateur radio operators, of D-Star and later other digital repeater modes including DMR and Yaesu system fusion by writing software that could be implemented on Arduino and Raspberry Pi hardware for the creation of multi-mode repeater and hotspot controllers.  G4KLX shares his ham radio story with Eric, 4Z1UG, in this QSO Today.

Show Notes

Listen to Podcast

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QRP Labs QCX Transceiver Kit

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Jonathan, G4KLX websites  

• GitHub
• Twitter
• The Road to MMDVM - YouTube

Fred Ward, G2CVV

RSGB - Radio Society of Great Britain

Shortwave Listener

First License: G8TXQ - Class B license
Sept 1980 upgrade to Class A

Certification: HND computer science

1750 tone burst

Sunspot Cycle 21

Tonna Antenna

G8LMW consulting - LMW Electronics 23 cm transverter

2C39 PA Tube

4CX250B PA Tube

Neighborhood: Derbyshire, UK

HB9DRD, Jonathan’s Swiss callsign

Mobile communication modes and projects:

• D-Star digital mode
• K5TIT G2
• Open G2 Gateway Project
• IRCDDB - IRC DSTAR Database
• D-Star Reflector - the killer app for D-Star
• Robin, AR4RC,  made D-Star reflectors
• XRF Protocol -
• Yaesu System Fusion
• DMR - digital mobile radio
• NXDN - next generation digital narrowband (used by Kenwood and Icom commercially)
• P25 - called Project 25 or APCO-25
• DVSI codec
• TDMA - time division multiple access
• Tetra - public service protocol used in Europe
• DMR Gateway
• DMR Color Code
• Brandmeister Network
• D-Star
• MMDVM Project
• Pi-Star - PiStar Digital Voice Software

Radios:

• Icom IC-240 synthesized VHF transceiver using diode matrix for channel selection
• Icom IC-22A VHF crystal controlled transceiver
• Heathkit DX-100
• Yaesu FTDX400
• Connect Systems CS700
• Kenwood TS-770
• Icom IC-202
• Icom IC-91 Dstar radio
• Motorola XTS3000 P25 radio

David, PA7LIM

G4KLX PCRepeater Controller

uWave SDR

Greatest challenge to amateur radio:  Getting young blood into ham radio.

Excited most by: Rise of SDR using simple hardware but massively flexible.

Advice to new or returning hams: Investigate the new elements.

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Icom IC-240 VHF Transceiver with diode matrix programming

Yaesu FTDX-400 HF Transceiver

Icom IC-91AD D-Star Portable

DMR Zumspot Hotspot