2021 Oceania DX (OCDX) Contest

The phone section of the 76th 2021 OCDX starts at 06:00 Z on Saturday, October 2nd, and ends at 06:00 Z on Sunday, October 3rd.

OCDX promotes HF contacts to and from stations in the Oceania region  as well as contacts between stations inside Oceania. DX transmitting entrants contact as many Oceania stations as possible.

Prefixes are multipliers, entries on individual bands are supported. Contest exchanges are signal reports plus a serial number, starting at 001. The deadline for submitting logs is 31 October 2021.

Current rules can be downloaded from here.

Northern California DX Club

Special Event 75th Anniversary

On October 10, 2021 the Northern California DX Club will celebrate our 75th year! To mark this milestone we will hold an HF Special Event on the weekend of October 9th and 10th, 2021. Using our call sign W6TI we can be found operating on bands 15, 17, 20, and 40 meters and using SSB, CW and FT8 modes. The festivities begin at 16:00-23:59Z October 9th and continue 16:00-23:59Z Sunday October 10th.

A special QSL card will be available upon request. QSL details at W6TI on QRZ.com.

Since October 10, 1946 the Northern California DX Club has been dedicated to the finest ideals of good DXing, raising the standards of Amateur Radio practice and ethics and interactively sharing knowledge and information to enhance and benefit the Amateur Radio Community.

NCDXC has co-hosted the International DX Convention for over 70 years.

Received from Tony Dowler, K6BV
President NCDXC

Balloon Experiments – 9V1UP-11

Saturday 4 Sep 2021 23:00H / 15:00Z. APRS on 144.390 BEACON only.

Join the fun hunting for the APRS signals after launch. The balloon is estimated to be in the air for a few hours. Signals are likely to be received in the region: Singapore, Johor, and Riau. For the past few months, a team of Singapore hams have worked on a project to launch a weather balloon carrying amateur radio. The flight system consists of a 600g weather balloon filled with Helium (industrial grade) and the payload is assembled from a LightAPRS tracker. Approval of flight involved “no objection” from CAAS, RSAF and IMDA, and Saturday’s flight requires release clearance from RSAF duty controller. For launch, two teams will be deployed in the western side of Singapore. The launch team will attend to the lift off while the remote monitoring team will receive and iGate the APRS signals.

Tracker: https://9v1up.ragulbalaji.com/tracker/

Updates: Ham Radio SG on Facebook

The project team is busy preparing for the launch and may not have time to answer questions that you may have. A presentation will share various aspects of the project at the next SARTS meeting. Come this Saturday, share in comments when you receive 9V1UP-11, stating your QTH and telemetry.

Source: 9V1YP

Ham Radio via Satellites

Hardware, Software, Experiences

SARTS talk by Klaus, 9V1KG, 29th July 2021

Klaus presented his setup and experiences working linear Satellites.

Satellite Audio Samples

Hope 1 CW telemetry
TO-108 – some strange tones before the CW transmission starts
Athenoxat-1 – Singapore Satellite from Giulio, 9V1FC
Calling CQ on RS-44 – right channel: CW side tone, left channel: signal from the satellite. Clearly to hear the Doppler shift.
RZ0CQ calling in CW via RS-44
Tunig in my SSB signal
CQ SSB – right channel: Up link, left channel: Downlink
JA3IKC answering my call
Nayif-1 telemetry signal 1K2 BPSK

Satellite Operation Outdoor Planning SOOP

https://github.com/9V1KG/soop

Membership fees and donations from overseas

If you want to renew/apply for SARTS membership from overseas and you don’t have an SGD bank account, please use the information below.

Transferring of SGD only from overseas:

Beneficiary Bank Information (mandatory)

Bank Name: Oversea-Chinese Banking Corporation Limited
Address: 65 Chulia Street, OCBC Centre, Singapore 049513 
SWIFT Code : OCBCSGSG 

Beneficiary Information  (mandatory)

Account Name: SARTS
Account No: 524701182001

Transferring of USD from overseas:

Same as above plus:

Intermediary/Correspondent Bank Information for USD only

Bank Name: JP Morgan Chase Bank
Address: 1 Chase Manhattan Plaza, New York, NY 10015, USA  
SWIFT Code: CHASUS33 

SARTS Membership List 2021

Last updated: 2021-10-15

9V1AIV. Jayaram
9V1AJG. S. Balakrishnan
9V1ALAlex Lee
9V1AQClaudio Caballero
9V1ARKenneth Ricaborda
9V1ASJeff Yeo
9V1AWAaron Wong
9V1AXKelem Amir
9V1BCSolomon Tan Wei Jie
9V1BGAchala Daarshana Senaranta
9V1BHVictor Boudioukine
9V1BOBaino Paul
9V1CCSoh Cheah Choon
9V1CDArnold Cabahug
9V1CEKevin W Rogers (KF7TUU)
9V1CKClaus J Karthe
9V1CLDaniel Deng Jue
9V1CSC. S. Lim
9V1CVChoong Sek Yeen
9V1DADiego Abas
9V1DEDarryl Ee
9V1DKDerrick King
9V1DSDarran Siu
9V1DTSampath Kumar Padmanabhan
9V1DWDixon Wang
9V1DYDanny Vong
9V1EDEddy Kok
9V1EHLiu Chang
9V1EPMasakazu Namajiri
9V1FHThum Fu Hang
9V1FJBarry Fletcher
9V1FLFrancis Lim
9V1GZGuenter Zwickl
9V1HFKoenraad Mouthaan
9V1HHAmos Hoe
9V1HLHerman Lahey
9V1HPHarish Pillay
9V1HYHaoyuan Chu
9V1JEJeremias Wong
9V1JHAaron Pok
9V1JMJoey Muncada
9V1JNJothinathan G. S. Sundram
9V1JTJose Carlos (JC) Cortez Tupaz
9V1KBBenjamin Koe
9V1KGKlaus Goepel
9V1KHPeter Loo
9V1KSTan Koh Siang
9V1KTKevin Tan
9V1LCChoong Lee Song
9V1LDLarry Dimaano
9V1LHStephan Grensemann
9V1LWChia Lih Wei
9V1LXMike Easterbrook
9V1LYLi Yu
9V1MHMatt Howard
9V1ODTan Lian Huat
9V1OGRene Atienza Ogie
9V1OWDr. Masahiro Wada
9V1PKPeter Khor
9V1PLPhilip Lai Yong Yeow
9V1QQBob Fabrizio
9V1RTRoland Turner
9V1SHShuichi Hosokai
9V1SVAzhaga Muthu Siva
9V1TEJames Buckner (Assoc.)
9V1TTAndrew Hodges
9V1UUTakehisa Sato
9V1XBPatrick Tham
9V1XKAndy Yee Lai Seng
9V1XVXavier Tong
9V1XXKazuhiko Kurita
9V1YCJames Brooks
9V1YJShigeyoshi Sasaki
9V1YLSally Woon
9V1YPChew Lip Heng
9V1YWYingwang Shi
9V1ZHTan Boen-Hian
9V1ZKFred Lee
9V1ZVDaniel Wee
9V1ZWMichael Davidson
Assoc.Abhishek Rai
Assoc. Roger Lee
Assoc.Nicholas Chan
Assoc.Omkiran Sharma
Assoc.Harish Nair
SARTS membership list 2021

Ionospheric Scintillation

Radio signals passing through the ionosphere can be affected by small irregularities of the ionospheric plasma. This phenomenon is called radio scintillation and can strongly disturb or disrupt the signal transmission. As a result it can prevent a GPS receiver from locking on to the signal and can make it impossible to calculate a position. Less severe scintillation conditions can reduce the accuracy and the confidence of positioning results.

Transionospheric radio scintillation is statistically characterized by two parameters, amplitude and phase fluctuations indices, denoted respectively by S4 and σφ .

S4 is defined as the ratio of the standard deviation of signal intensity and the average signal intensity. Amplitude scintillations are prominent near the geomagnetic equator. They almost appear regularly in the evening hours.

σφ is defined as the standard deviation of a linearly detrended phase data segment. Phase scintillations are prominent in high latitudes, and their occurrence rate increases with geomagnetic activity.

SARTS received a request for statistics or help in acquiring statistics of ionospheric scintillation in the VHF range. VHF is not a common frequency range used in space infrastructure and there seems to be a lack of statistics in the area between tropics, where the ionosphere is bubbling quite frequently.

For interest or feedback, please comment below or contact the webmaster (9V1KG).

Sources:

https://www.swpc.noaa.gov/phenomena/ionospheric-scintillation
https://swe.ssa.esa.int/tio_sci
https://www.nasa.gov/mission_pages/cindi/scintillation.html