dose sun spot activity effect long wave propagation? If not what dose? I use a large loop anteanna with very good results for receiving . Also I keep receiving a signal @225kc in code, _... ..../ bh. Any ideas? Very curious.
No, sunspots do not affect LF propagation. Two big factors are: -Geomagnetic activity -Lightning noise levels
LGS: Actually, BH is on 224 kHz. It is the NDB (non directional beacon) for the Birmingham, Alabama, Shuttlesworth International Airport (BH for "Birmingham"). Glen, K9STH
http://www.infotechcomms.net/Understanding_LF_and_HF_propagation.pdf Articles on Propagation by band from the RSGB RADCOM http://www.472khz.org/pages/technical-topics/propagation.php Excellent discussion of 630m propagation, particularly geomagnetic effects and the DST index.
Thanks. That answers that guestion! I really injoy listening to LF . Started out using the sound card on an old laptop. Worked for the VLF but not the LF. Even drove copper rods in the ground for antenna.
thanks for posting those links! The 2019 ARRL Handbook doesn't have deep coverage of this topic, sadly.
This is an excellent reference for LF/MF : http://www.arrl.org/shop/LF-Today-3rd-Edition The NDB's are also a lot of fun - they keep track of NDBs collected here in a monthly publication: https://www.lwca.net/ Good luck ! 73 Jim, WQ2H / WK2XAH
