South Manchester Radio and Computing ClubThe following page contains links which the reader may find interesting:-
Other Clubs and Societies
The club is affiliated to the following societies:-
The Radio Society Of Great Britain
NARSA
The Northern Amateur Radio Societies Association organises an annual rally which for many years has been at the Norbreck Hotel, Blackpool.
Ofcom Downloads
The Ofcom Amateur Resources Pages has the On-Line Services User Guide and the forms you may need when you can't use
http://licensing.ofcom.org.uk/radiocommunication-licences/amateur-radio/forms-resources/
History of the Telegraph
http://nearfieldcommunication.org/history-of-the-telegraph.html
Learning Morse
Our own CW Pages
The International Morse Preservation Society - Fists CW Club
- Lots of resources including more on-air practice sessions, programs and other links
The RSGB GB2CW schedule
G4ILO's Excellant Traning Programs:- Morse Gen & Morse Machine
The "Just Learn Morse" program
Magnetic Loop Antennas
Brians PPT on Home Brew Magnetic Loops.
Surface Mount Soldering
Nice tutorial:- http://www.midnightdesignsolutions.com/dds60/index.html
Videos on YouTube
Sites Selling Hot Air Equipment
http://www.pcb-soldering.co.uk/
Solder Paste
Low Melt-point Solder
AMSAT Colloquium
Presentation can be downloaded here:-
Video presentations of lectures filmed and streamed live during AMSAT Colloquium
Once at the BATC site, select Film Archives.
Antenna Matching
http://www.g3ynh.info/zdocs/z_matcing
The pages on impedance matching (Parts 1 and 2), including the analysis and operation of L, T and Pi networks, are excellent. The treatment of the subject includes a tiny bit of maths (R, G and jX), but that adds to the excitement.
Time and frequency related Links
Two frequencies where time signals can be found are 4.996 MHz and 9.996 MHz. The signals come from RWM near Moscow. The service is 24-hours and the schedule of modulation can be found in Wikipedia by searching for RWM.
This link gives the modulation cycle foir the time signal http://www.sigidwiki.com/RWM
International Earth Rotation and Reference Service - Measuring the irregularities of the Earth's rotation:- http://www.iers.org/
Time Nuts Mailing list :- http://www.leapsecond.com/time-nuts.htm
Some Standard Time Sites
In January 2012 a decision was to be made on retaining or dropping the leap second, the latter being the USA's proposal. The decision that actually came out was to postpone the decision until 2015! Now postponed until 2023.
A problem with retaining the leap second is that they will become problematically more frequent as the years go by. Currently one leap second is introduced every year or two. Centuries from now, the Earth's rotation will slow down to such a rate that several leap seconds a day will be necessary to keep Atomic Time in step with Solar Time. See the NPL website for further detail,
http://www.npl.co.uk/educate-explore/what-is-time/the-leap-second-debate
Propagation Links
NOAA's Space Weather Prediction Centre. Solar indices every three hours.
http://services.swpc.noaa.gov/text/wwv.txt
The Propagation link in the menu of this website leads to an abbreviated version of the Space Weather Centre's flux and sunspot summary.
RSGB Propagation Studies page - lots of links and useful information.
Space Weather Prediction Center
Software and Utilities
Antenna Modeling Software and other Utility Programs by Dan Maguire, AC6LA
Arduino Morse Beacon
http://brainwagon.org/2009/11/14/another-try-at-an-arduino-based-morse-beacon/comment-page-1/
The source file may be downloaded from here:-
http://www.smrcc.org.uk/sites/default/files/beacon.ino
Free versions of HRD
http://www.iw5edi.com/software/ham-radio-deluxe-5-download-links
See also the SMRCC Tools page => http://www.smrcc.org.uk/tools
