The article linked above references this link. Maybe it will work for you.Here is what the link brings up:
Dangerous Website Blocked
Interesting. Is this new frequency-range something that hams in other countries already use, or is it something that functionally will be US-only, for now?
Some other countries have LF/MF allocations but I don't know off hand which ones or if they are the same frequencies as here.Interesting. Is this new frequency-range something that hams in other countries already use, or is it something that functionally will be US-only, for now?
I don't know how up to date or accurate these are:Some other countries have LF/MF allocations but I don't know off hand which ones or if they are the same frequencies as here.
Speaking of antennas...With the very low power and antenna restrictions, these are no doubt going to be used for narrow band digital modes, likely slow speed stuff like QRSS. Might be able to squeeze PSK31 if it's narrow enough
LF amateur 2200 meter band 135.7- 137.8 kHz (2.1KHx wide). FYI a dipole would be nearly a ½ mile long, maximum power would be 5 watts EIRP.
MF 630 meter band for US amateurs 472-479 kHz. FYI a dipole would be a mere 635 feet long. A non-loaded vertical would be 32 stories high (to say nothing of your ground radials). Maximum EIRP would be 5 watts. :lol:
That looks like a fun little toy. I may have to get me one. I've been chasing LF and MF beacons for many years. Becoming the DX to be chased is a blast.This 2200 little experiment will provide me with plenty of entertainment...
Check back issues of QEX magazine from the last 7-8 years. There was a pretty good article with some empirical data on radial ground systems that might be of some use. It did some comparisons of things like many short radials vs. fewer long ones, and so on. Might give you some ideas.The bigger task I see, however, is going to be the ground matrix beneath it...
... My feeble ground system will be a mockery of NSS’s, I’m afraid
Do what the LF beacon transmitters do... Key the antenna matching network along with the transmitter.But sparking is not something I take lightly. The Q of this array will be so high, and thus the bandwidth so narrow, that +1Khz deviation will likely cause it to arc… hence I plan on a slow speed digital data mode.
Let us know when it's on the air. I have some pretty mean RX capability below 500 KHz.It should prove an interesting summer, however ………