As requested by several people, here is a collection of highlightsof 
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 thanksto all those who caught the error in my .sig.  
I guess I'll golisten to the tapes some more :-).Thanks again.                                                 
73s,                                           
jerryp@key.amdahl.com                                               

KC6RTO
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From alan@dsd.es.com Wed Jun  3 06:43:44 1992     

(K6X0)...yes, Virginia, there is a real citizen's band between160 
and 190 KHz. The limitations are: one watt output power, andthe 
antenna can be no longer than 50 feet including the feedline.
There are some serious experimenters using the band for 
propagationstudies and so on, but there is lots of room for CW 
signals. Youmay hear several beacons operating there 24 hours a day. 
There isa newsletter, but I do not know who publishes it. Other than 
thepower and antenna restrictions, as far as I know anything goes.
To my knowledge there is no commercially made equipment availablefor 
this band - virtually everyone builds their own transmitters,and most 
of the modern receivers will tune down on that band. Ilisten there 
once in a while with 

my TS-930 but have never beeninterested in transmitting there. 

Good luck.

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(KC6WUG)...FCC part 15 (no license) 1750 meter band:  160-190 KHz.  

1 watt maxinput power.  15 meter maximum lenght of antenna + feedline.
Withthose power and antenna restrictions you don't get much range.

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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'reallowed 
1-watt output, total length/height of antenna includingfeed line is 
50 ft (max allowed by law). Most folks put the xmtrright at the base 
of the antenna.You can join the Longwave Club of America, which was
organized in1974 to promote DXing and experimentation on frequencies 
below 550 kHz and activity on the 1750 meter band. Membership in 
theLWCA and a one-year subscription to The LOWDOWN is $12.00 byFirst 
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,

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>From: pdh@netcom.com (Phil Howard )                        

(KA9WGN)Depending on your effective bandwidth, you can extend it.  

I've readabout very slow digital going something like 
1000 to 2000 km.

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As promised, here's the summary of the information I requestedfrom 
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 
manufacturers 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 anyone 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!  :-)

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