practical wireless số 2010 05

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Sunday June 6th 2010 Practical Wireless, May 2010 19 The Second Practical Wireless 70MHz Low Power Contest The 2010 Rules 1 General: The contest is open to all licensed Radio Amateurs, fixed stations or portable, using s.s.b., c.w., a.m or f.m in the 70MHz (4m) band Entries may be from individuals or from groups, clubs, etc The duration will be from 1200 to 1700 UTC on Sunday June 6th 2010 All stations... very much in line with those used last year, which are based on the popular Practical Wireless 144MHz QRP Contest The main change this year is to reduce the duration of the contest by one hour, and to run it on the Sunday on the weekend before the Practical Wireless 144MHz QRP Contest For those new to the 4m band, the Practical Wireless 70MHz low power contest is a perfect introduction to the friendly... circuit of the transverter allows the FT-817 to operate ‘split-band’, receiving the 500kHz band directly and transmitting at 28MHz, to be converted down to the band Practical Wireless, May 2010 17 Come and join in the fun on Four! Practical Wireless 70MHz Low Power Contest Feature The Second Editor’s acknowledgement: Colin, Tex Swann G1TEX and I were pleased at the number of entries for the first PW 70MHz... CDG2000 transceiver I would be pleased if you could spare space in Practical Wireless to alert your readers to this website and possibly add it to your ‘links’ page too?” Regards Jack HardcastleG3JIR jack.g3jir@btinternet.com www.warc.org.uk/ Fig 1: Shefford Club members proudly show off their completed home-brew kits Practical Wireless, May 2010 11 news & products Jersey GB3GJ Repeater To Rise Again! Newsdesk... to chat to friends during breaks in QSOs! A helping – steadying – hand can save many burnt fingers at a Buildathon! Practical Wireless, May 2010 Feature The ‘Whisper’ is that Roger’s doing well on his l.f adventures! Further 500kHz Experiments & WSPR I n the December 2009 issue Practical Wireless, I described my first attempts at a very basic transmitter for 500kHz using WSPR (‘Whisper’), the weak signal... Complete Transverter IRF510 f.e.t Roger Lapthorn G3XBM updates his adventures on l.f and has proved you don’t Continued on page 17 need to shout – ‘Whispering’ is very effective! Practical Wireless, May 2010 13 CALL MAIL ORDER 01908 281 705 sales@moonrakerukltd.com Hand-helds Alinco DJ-G7 Triband 2/70/23cm £359.00 Special Offer £299.00 Alinco DJ-V5 Dual band 2/70cm £199.00 Alinco DJ-596 Dual band... elcome to this year’s Contest introduction! The Second Annual Practical Wireless 70MHz Low Power Contest takes place on Sunday June 6th 2010 from 1200 to 1700 UTC The date and time have been chosen to avoid clashing with other 70 and 50MHz contests that I, as the Adjudicator, am aware of at the time of preparing this article late in February 2010 Hopefully, entrants will be able to take advantage of some... Please note photographs cannot be returned and may be used for publication in Practical Wireless or on the www.pwcontest.org.uk website If these are not available by the time the entry is submitted, they may be sent later by E-mail or post, to arrive by August 11th 2009 The results will be published later this year in Practical Wireless 7 Miscellaneous: When operating portable, obtain permission from the... Approx 30ft erect 8ft collapsed £179.95 TMF-2 Fibreglass mast 5 sections 240cm each 60mm to 30mm Approx 40ft erect 9ft collapsed £199.95 PICTURES ARE FOR REFERENCE ONLY New lower prices! Practical Wireless, May 2010 Continued from page 13 Fig 6: a selection of the stations that have received Roger’s signal Fig 3: A close-up shot Fig 4: The capacity hat on the vertical section has of the capacity hat... comparable antennas needing to be around twice the size that they are on 144MHz, many stations will perhaps be Colin Redwood G6MXL steps onto the rostrum to announce the second PW 70MHz Contest 18 Practical Wireless, May 2010 using nothing more than a simple dipole or quarter-wave vertical Most stations with Yagi antennas are likely to have fewer than six elements For operation on a.m and f.m., vertically polarised . y0 w1 h1" alt="" Practical Wireless May 2010 contents Volume 86. Number 5. Issue 1236. On sale 8 April 2010 Practical Wireless, May 2010 5 Copyright © PW PUBLISHING LTD. 2010. Copyright in. ‘Whispering’ is very effective! Practical Wireless, May 2010 13 Continued on page 17 CALL MAIL ORDER 01908 281 705 sales@moonrakerukltd.com Practical Wireless, May 2010 14 Hand-helds Alinco DJ-G7. really enjoyable time. Good luck everyone! Practical Wireless, May 2010 19 Sunday June 6th 2010 The Second Practical Wireless 70MHz Low Power Contest The 2010 Rules 1. General: The contest is open