Hi everybody,
Since we all follow part 15 guidelines in which:
- The RF output of the TX is less than 100 milliwatts
Hi everybody,
Since we all follow part 15 guidelines in which:
- The RF output of the TX is less than 100 milliwatts
- The maximum length of antenna from the TX is less than 10 ft (or 3 meters)
I wonder if someone would have no problems if he builds their very own CW transmitter in the AM band within part 15 regulations? I would like to know if the part 15 rules permit us to operate some CW operations. I already know that CW operations propagates very much than AM waves, but i would like to know if the CW daytime operations is more efficient in the AM band (540 to 1710 kHz) than the 20 meters band (14.200 mHz) (or vice-versa) ???
Yves (the french canadian guy).
I can give a little help but you might want to study part 15 a bit more, especially 15.209 and 15.219. Be aware that general restrictions may appear in other sections.
Section 15.215 Additional provisions to the general radiated emission limitations.
(a) The regulations in §§ 15.217-15.257 provide alternatives to the general radiated emission
limits for intentional radiators operating in specified frequency bands. Unless otherwise stated, there are
no restrictions as to the types of operation permitted under these sections.
Since the 100 mW, 3m restrictions are in 15.219 check that. It appears there are no restrictions except for damped waves which is covered in another part 15 section.
So, it appears CW is OK.
It has been so long since I researched this that I no longer have my bookmarks (and memory of the details) but I recall finding sites which discuss what you propose. Try a search on MW, MW clubs, MW DX, and similar medium wave topics. You'll probably find lots of information.
Neil
and that sort of triggered a really dim recollection floating around in what's left of my mind (too many 70's back in the drugs?).
Isn't there a medfer beacon reg in part 15, or maybe 73, that allows certain unlicensed AM BCB activity on CW if the timing of the pulse meets certain parameters?
I think I might have read this in an old Radio Shack electronics booklet (remember the little dedicated-topic, small format booklets RS used to sell?) called "Communications Circuits" or something like that. IIRC, it was in support of a schematic for a little one transistor CW transmitter with a loading coil made of wire wound on a soda straw?
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