A Portable QRP CW Amateur Transceiver for 475 KHZ 630 Meter - Etsy
US Amateur Radio Bands: Frequency Charts
New 630-Meter Band Reported “Very Busy”
AC1CP Amateur Radio Band Plan
KA7OEI's blog: A transmit converter (and amplifier) for 630 and 2200 meters
Casella CEL 630.A Type 2 Ultra Wide Octave Band Sound Level Meter Kit
Antique Radio Forums • View topic - 630 meter (472-479 kHz) Amateur Band
Marconi Antenna for LF/MF
630-meter Ham Band | A Ham Radio Band below the AM Broadcast Band - YouTube
2200 and 630 Meters
Getting Started on 630 metres
472kHz.org
The 630M/2200M Antenna Recipe
The 630 - Meter Band: Is it Practical for Amateur Use? on Vimeo
FCC Opens 630/2200 Meters Amateur Band; Pre-Registration Required!
Dual 6V6 QRP Transmitter/Regenerative Receiver 630/160/80/40 Meter Bands | eBay
Hams Map Powerlines for Low Frequency Interference | QRZ Forums
Getting Started on 630 metres
630m Transverter
Lowdown 630-Meter Band Amateur Radio Antenna
KA7OEI's blog: A transmit converter (and amplifier) for 630 and 2200 meters
630 Meters | W0QL – My Remote Base Journal
Notification Process for 630 and 2200 Meter band Operation – N4BFR Vision
Ham Radio - Get on 630 meters with a bucket variometer! - YouTube
