I'm Jon (KB0RB)
Based in Vacaville, California, continuing a family tradition of ham radio across generations — and writing software for it along the way.
Contact Details
Find me on the airwaves
I'm always looking to chat with new folks and learn new things — if you see me, say hi!
I come from a long line of hams going back generations and am proud to carry on the family tradition, combining technology and communication with the fun of meeting new people. I'm a member of the ARRL as well as the Vaca Valley Radio Club (VVRC) and Sac Valley Mesh, and got my FCC Amateur Extra in 2025.
The hobby is also where most of my software ends up. I build iOS apps for the things I wanted on my own bench — running FT8 from a phone in the field, and keeping an AllStarLink node under control from wherever I happen to be.
I'm always looking to chat with new folks and learn new things, so if you see me, say hi! I send eQSLs and haven't gotten physical ones made yet — but I hope to soon.
Projects
Software I write and support, mostly for the radio bench.
Greyline FT8
FT8 and FT4 digital modes for iPhone and iPad
A full-featured digital mode app that runs FT8 and FT4 straight from an iPhone or iPad — live waterfall, automated QSO modes, POTA activations, spot maps and logging, with no laptop in the field.
Visit greylineft8.com
We Have Wine at Home!
A visual cellar for the wine, beer and spirits you already own
An iPhone and iPad app for cataloguing your collection — a colour-coded grid of shelves and slots, label photos, CSV import and export, and a swipe to mark a bottle consumed. No accounts, no ads, no subscriptions.
Visit wehavewineathome.app
AllStar Node Control
Run your AllStarLink node from your pocket
An iOS app for operating AllStarLink nodes — connect and disconnect links, watch node status, and keep your favourite nodes a tap away. Everything stays on your device.
Coming soon to the App Store
Read moreTransceivers
- Yaesu FTM-500D for VHF/UHF
- Icom IC-7300 for HF
- AnyTone DV878II Plus HT for VHF/UHF and DMR
- Baofeng F8HP-Pro HT
- TIDRADIO H3 HT for GMRS
- QRZ-1 Explorer HT
Antennas & Accessories
- Diamond X-30A antenna for 2m/70cm
- Palomar BAS-71 9:1 unun random wire end fed for HF
- Daiwa CN-901 SWR meter
- Tekpower TP50SW power supply
- Palomar CMNF-500-50 noise filter
Digital & Mesh
- HamClock on Synology
- WSJT-X for FT8
- Meshtastic and LoRa devices
- B&O Station G2 with Airframes cavity filter and 10 dBi antenna