Dual 6V6 QRP Transmitter/Regenerative Receiver 630/160/80/40 Meter Bands | eBay
Amateur Radio Activiy on the 630 meter band (Medium Frequency)
630 meters Ham Radio - Old is New, Again - Making It Up
Lowdown 630-Meter Band Amateur Radio Antenna
472kHz.org
Getting Started on 630 metres
Meter WSPR Beacon Transmitter
Antique Radio Forums • View topic - 630 meter (472-479 kHz) Amateur Band
2200 and 630 Meters
New 630-Meter Band Reported “Very Busy”
KA7OEI's blog: KA7OEI now QRV on 630 and 2200 meters
630 meter band: i1wqrlinkradio.com
WD8DAS 630-Meter Band Operations
A Portable QRP CW Amateur Transceiver for 475 KHZ 630 Meter - Etsy Canada
KA7OEI's blog: A transmit converter (and amplifier) for 630 and 2200 meters
Hams Map Powerlines for Low Frequency Interference | QRZ Forums
2200m Archives • AmateurRadio.com
472kHz.org
Ham Radio - The 630 meter CW transmitter part 4. It's done and it works! - YouTube
Amateur Radio Activiy on the 630 meter band (Medium Frequency)
2200 and 630 Meters
630m Transverter
Ham Radio - Get on 630 meters with a bucket variometer! - YouTube
