Other Bands
of Amateur Interest
•71.6 - 74.4
kHz – U.K. allocation
•Mostly for cave communications using induction rather
then radio
•135.7-137.8
kHz – 2200m Band
•Approved at the World Radio Communication Conference
(WRC-07) for world wide use but not by FCC
•Many stations active, mostly in UK and Canada
•Many use ARGO, by I2PHD and IK2CZZ - Software for
decoding QRSS signals
•160-190 kHz –
LowFER (Low-Frequency Experimental Radio) Band (Real QRPp!)
•License free operation under FCC Part 15.217
•Limit 1W DC input to the PA
•Maximum 15m of
antenna, ground lead, and feedline together!
To
DC
20
Hz
3
kHz
20
kHz
30
kHz
Human
Hearing Range
VLF
ULF
300
Hz
SLF
30
Hz
ELF
3
Hz
To
Daylight
Range
of Interest
LF
30
kHz
300
kHz