>From: J..R..Pendleton@f851.n102.z1.fidonet.org (J. R. Pendleton) >Sender: NewsMeister@mcws.fidonet.org >Path: news.unomaha.edu!sol.ctr.columbia.edu!usc!elroy.jpl.nasa.gov!mcws!NewsMeister >Newsgroups: rec.radio.amateur.misc Subject: Yes there is a 1750 Meter band >Message-ID: <708161842.F00058@mcws.fidonet.org> >Date: Sun, 07 Jun 1992 21:30:26 -0700 >Lines: 145 Organization: Employer not involved in this. As requested by several people, here is a collection of highlights of the replies I recieved to "Does 1750 meters really exist". It looks like one of the replies was from a FAQ list, but since I got several requests to summarize, I'll go ahead and consume the bandwidth. Many thanks to all that took the time to reply. And many thanks to all those who caught the error in my .sig. I guess I'll go listen to the tapes some more :-). Thanks again. 73s, jerryp@key.amdahl.com KC6RTO -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= >From alan@dsd.es.com Wed Jun 3 06:43:44 1992 (K6X0) ...yes, Virginia, there is a real citizen's band between 160 and 190 KHz. The limitations are: one watt output power, and the antenna can be no longer than 50 feet including the feedline. There are some serious experimenters using the band for propagation studies and so on, but there is lots of room for CW signals. You may hear several beacons operating there 24 hours a day. There is a newsletter, but I do not know who publishes it. Other than the power and antenna restrictions, as far as I know anything goes. To my knowledge there is no commercially made equipment available for this band - virtually everyone builds their own transmitters, and most of the modern receivers will tune down on that band. I listen there once in a while with my TS-930 but have never been interested in transmitting there. Good luck. **************************************************************************** (KC6WUG) ...FCC part 15 (no license) 1750 meter band: 160-190 KHz. 1 watt max input power. 15 meter maximum lenght of antenna + feedline. With those power and antenna restrictions you don't get much range. ***************************************************************************** >From jkearman@arrl.org Fri Jun 5 07:55:06 1992 (KR1S) ^^^^ |------(AhHA! - So much for the benign neglect theory -- JRP) JP: Well, shucks. We have run articles about this band in the past. I guess we should do it again. The band runs from 160-190 kHz. You're allowed 1-watt output, total length/height of antenna including feed line is 50 ft (max allowed by law). Most folks put the xmtr right at the base of the antenna. You can join the Longwave Club of America, which was organized in 1974 to promote DXing and experimentation on frequencies below 550 kHz and activity on the 1750 meter band. Membership in the LWCA and a one-year subscription to The LOWDOWN is $12.00 by First Class Mail. Please make all remittances payable to the Longwave Club, and mail to LWCA, 45 Wildflower Rd., Levittown, PA 19057. [Direct quote from the LOWDOWN] (See, we READ it here!) The LOWDOWN is published monthly. Good luck and 73, *************************************************************************** >From: pdh@netcom.com (Phil Howard ) (KA9WGN) Depending on your effective bandwidth, you can extend it. I've read about very slow digital going something like 1000 to 2000 km. ***************************************************************************** As promised, here's the summary of the information I requested from the net a couple weeks ago regarding the 1750 meter band. Does one need a license to operate on this band? No. This means that you can choose your own callsign although callsigns are not required. What is this band for? Experimentation mainly. It is especially fun to attempt QRP operation and one respondent said that given the right type of modulation and antenna setup, signals can travel 1000 miles or more with just under one watt output! Lots of folks use CW beacons and there is a radio club called The Lowfers (Low Frequency Users, presumedly). Be aware that this IS NOT a ham band although several LF receiver manu- facturers boast that their units can "receive the 1750-meter ham band". You will not find discussion of this band in the ARRL publications BECAUSE it is not a ham band. Perhaps some of the confusion here arises from the use by LF operators of ham radio callsigns. Many hams also operate in this band and use their own calls for identification, even though, as mentioned above, a callsign is not required here. What is the frequency limits of this band? The 1750 meter band spans from 160 to 190 KHz. What types of modulation may be employed? You may use CW and AM voice. You may be allowed others (FM, RTTY, etc). But the data I was able to gether was sketchy on this point. One person though said that there are no restrictions on modulation methods. What are the legal power limits and other transmitter-related restrictions? Transmitter power is limited to somewhat less than one watt output. The maximum power INPUT to the final should not exceed one watt. The length of the antenna added to the length of the feedline MAY NOT exceed 50 feet. Spurious emissions outside the band must be 60db below the signal strength at the carrier frequency. Who may use the band? Anyone, so long as they comply with the above regulations. Where can I get more definitive and detailed information on this band? The band is discussed in Part 15 of the Code of Federal Regulations which you can pick up at your local library (assuming it is a fairly big library), or you can order it from the nearest US Government Bookstore. If any- one knows where such a store is, please post its location. I'd like to snag a copy of Part 15 myself. Thanks to alan@dsd.es.com, kludge@grissom.larc.nasa.gov, kc2wz!bob%fdurt1@uunet.UU.NET, brown@hpspkla.spk.hp.com, markz@ssc.wa.com, and gary@ke4zv.uucp for all the information they provided. Happy Lowfering! :-) ****************************************************************************** -- -- --- .-. ... . -.-. --- -.. . .-.. .. ...- . ... .-.-.- --... ...-- -.. . -.- -.-. -.... .-. - --- * Origin: gated usenet/mcws.fidonet.org (818)352-2993 (1:102/851)