LF propagation?

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

 

Tk,s will keep that in mind. Any notes on the CW sig. I heard? @225kc.

 

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

 

Too bad the NDB system has been shutting down stations. I guess the US is more interested in just using GPS in aircraft lately. The Canadians seem to still rely on LF NDBs in the far north . I have about 5 pages of NDBs I have IDed over the years.

 

I think this is a grate and worthy subject for discussion and would like to keep it going. I think I might try to build a trx and do CW. That sound like fun. I have a small radio that receives the LF amateur band, and now have a ham-it-up receiver for my laptop . I've heard signals as low 12kc,s. if anyone has any info on long wave trx,s please post them. Old vacuum tubes would be grate! Can't help it , I'm old, vacuum tubes for ever! N4LGS