[amsat-bb] Re: Help for Information
Thailand Amateur Radio Satellites Corporate
tamsat_gateway at hotmail.com
Thu Aug 30 11:58:32 PDT 2007
Dear Sir All; Thank you very much for help me. I and we member in TAMSAT group would like want to technical documents with the information about the RF noise disturbance of Ham Radio using UHF radio frequency between 430.0000-440.0000 MHz in Amateur Radio band transmit RF noise disturbance with Radio Location Service or Fixed Service (see picture attachment) in every region country. Best Regards, Tanan Rangseeprom, HS1JAN / XU7ADNTAMSAT Group
Subject: FW: Help for InformationDate: Thu, 30 Aug 2007 09:22:32 -0400From: skkeane at arrl.orgTo: kk5do at arrl.net; tamsat_gateway at hotmail.comCC: w1vt at arrl.org; W6ROD at arrl.org
I dont have anything for you, but I have forwarded your mail to my contact at AMSAT, Bruce Paige, KK5DO. I am sure he can assist you in what you need.
S. Khrystyne Keane, K1SFA
ARRL News Editor
ARRL - the national association for Amateur Radio
From: Lau, Zack, W1VT Sent: Thursday, August 30, 2007 8:58 AMTo: 'Thailand Amateur Radio Satellites Corporate'Cc: Keane, S Khrystyne, K1SFA; Stafford, Rod (Int'l Vice President)Subject: RE: Help for Information
Hi Tanan Rangseeprom, HS1JAN,
Ill forward your request to Khrystyne K1SFA, who writes the news articles on our web page.
Zack Lau W1VTARRL Senior Lab EngineerARRL - The national association for Amateur Radio225 Main Street, Newington, CT 06111-1400 USA Telephone: (860) 594-0294 FAX: (860) 594-0259Email: w1vt at arrl.orgWorld Wide Web: http://www.arrl.org/
From: Thailand Amateur Radio Satellites Corporate [mailto:tamsat_gateway at hotmail.com] Posted At: Thursday, August 30, 2007 8:22 AMPosted To: TIS UNSORTEDConversation: Help for InformationSubject: Help for Information
Dear all Ham every region, Thailand at the present, the government sector called The National Telecommunications Commission or NTC has opened the public discussion about the Regulation of The National Telecommunications Commission for Amateur Radio Service Buddhist Year 2550. If this regulation announce, it will be subjected to all ham radio in Thailand whether they are Thai citizen or other nation. For the discussion, they would like to have technical documents with the information that can be referenced to propose to NTC within September 7th, 2007. We, Thailand Amateur Radio Satellite Corporate or TAMSAT Group, have found some problems within this regulation as followed: Section 3.3.1 says that the station of amateur radio for amateur satellite service is allowed to use transceivers that have maximum output power not more than 10 watts and use the directional antenna only But in the actual operation, the amateur satellite service can be used with the smalles omni
antenna such as rubber dack antenna or mobile antenna to communicate. For the example in URL http://rcfo.batcave.net/fo29movil.html, they use only mobile antenna and omni antenna to communicate via FO-29 satellite. For section 3.3.2 says that if the use of 145.8000-146.0000 MHz uplink radio frequency causes the satellite to transmit downlink radio frequency 435.0000-438.0000 MHz and it will disturb the use of UHF radio frequency that used in Radiolocation Service or Fixed Service or the satellite transmit downlink radio frequency outside of 435.0000-438.0000 MHz, the Amateur Radio Stations have to stop using 145.8000-146.0000 MHz immediately. But, again, in the actual operation, the signal from satellites in UHF frequency between 435.0000-438.0000 MHz is transmitted downlink radio frequency with very low maximum output power. Even we can receive with the small omni antenna with RF amplifier to amplify the received signal, we can receive in short period of time, lets say
not more than 15 minutes only. (LEO satellites) Therefore, it almost impossible that the signal will disturb the use of UHF radio frequency in other services. For this reason, TAMSAT Group would like to ask for kindly help from Hams that use amateur satellite service around the world. It would be very appreciated if you could send us the information such as technical documents, still pictures, or video clips of the station of Ham radio for amateur satellite service and also the information about the RF noise disturbance of using UHF radio frequency between 430.0000-440.0000 MHz in Amateur Radio band in every region. TAMSAT Group will use these information to propose to The National Telecommunications Commission of Thailand afterwards. For technical documents detail please reply to e-mail: tamsat_gateway at hotmail.com Thank you very much in advance for your all kindly help. Regards All, Tanan Rangseeprom
, HS1JAN TAMSAT Group
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