28 December, 2013

RAEM International HF Contest CW 2013

Ernst Krenkel Memorial
Radio amateurs from around the world are invited to participate in the 42nd contest. The RAEM contest is organised by "Soyuz Radioljubitelej Rossii" (Union of Radioamateurs of Russia) in memory of Ernst Krenkel (1903-1971) – famous polar investigator and radio communications operator (callsign RAEM), Hero of the Soviet Union, chairman of the USSR Radiosport Federation (1959-1971), and the first chairman of Central Radio Club of the USSR. Beginning in 1924, Krenkel was a pioneering member and main radio operator of many Russian Arctic winter research expeditions, as well as a veteran of the Russian Arctic polar station "North Pole-1" and numerous other Arctic marine expeditions.
1. Date. Bands. Mode
RAEM contest is held every year on the Sunday of the fourth full weekend of December.
In 2012 the contest commences 29th December at 00.00 UTC and ends 29th December at 11.59 UTC. Period of operation – 12 hours.
Bands: Only the 80, 40, 20, 15 and 10m bands may be used.
Mode: CW only.

2. Entry categories
Select only one of the following:
MULTI-ONE: Multiple operators, Single transmitter, all bands
SINGLE-OP ALL HIGH: Single operator, All bands, High power
SINGLE-OP ALL LOW: Single operator, All bands, Low power (total output power must not exceed 100 W)
SINGLE-OP 80M: Single operator, 80m band
SINGLE-OP 40M: Single operator, 40m band
SINGLE-OP 20M: Single operator, 20m band
SINGLE-OP 15M: Single operator, 15m band
SINGLE-OP 10M: Single operator, 10m band

During the contest, the Ernst Krenkel memorial amateur radio station will be on the air with the callsign RAEM. The honour of operating RAEM is given to the previous year's high scoring Russian MULTI-ONE team. The RAEM memorial radio station does not compete with other participants and has no limitations on the number of transmitters.
3. Exchanged
The exchange is formed from the following parts:
– progressive contact serial number starting with 001 for the first contact;
– your geographic latitude rounded to one degree precision;
– one-letter designator of hemisphere: "N" for North and "S" for South;
– your geographic longitude rounded to one degree precision;
– one-letter designator of hemisphere: "О" for East (from German Ost) and "W" for West.
RW9HZZ sends "001 57n85o": 001 is QSO number, 57n and 85o are coordinates;
RX0LWC sends "001 44n133o": 001 is QSO number, 44n and 133o are coordinates.

4. Terms of operation
1. A station may be worked once on each band for QSO point credit.
2. A maximum of ten band changes for MULTI-ONE may be made in any clock hour (00 through 59 minutes). Otherwise, all QSOs made after the eleventh band change and until the end of that clock hour give no points. For SINGLE-OP stations there is no limit on band changes.
3. Only one transmitted signal is permitted at any one time for all categories. When two or more transmitters are present, either a software or hardware interlock must be used to prevent more than one signal at any time.
4. Use of any assistance or information provided by any outside person or device is not allowed. The exception is that publicly accessible (open) information networks (e. g. DX clusters) are allowed in every category.
5. Single-band entries are permitted to operate on other bands. Only QSOs on the claimed category-band give points.
6. The number of duplicated sent or skipped QSO numbers must not exceed 2% of claimed QSOs.
7. By submitting an entry in the RAEM International DX Contest you agree that you have read and understood the rules of the contest and agree to be bound by them.

5. Scoring
1. Every valid QSO gives 50 points.
2. Every one degree in geographic coordinates' difference in latitude (your and received coordinates in exchange) gives one point in addition; the same for longitude.
3. Every QSO with a polar amateur radio station (defined as a station located within the Earth's Polar Circles and sending a latitude of 66 degrees or greater) gives 100 points in addition.
4. Every QSO with the RAEM memorial amateur radio station gives 300 points in addition.

6. Final score
The final score is the sum of QSO points, geographic coordinates' points, polar contacts' points, and RAEM station points. Example: (300 QSOs) х 50 + 11000 points for coordinates + (17 QSOs with polar stations) х 100 + (RAEM QSOs on each of five bands) х 300 = 29200 points.
For participants located within the Polar Circles, the score above is multiplied by factor 1.1.
The calculation of claimed score is provided by Contest Committee: it is not required for participants themselves to calculate the score.

7. Rules for SWL category
SWLs have to copy callsigns of both sides of a QSO and the complete exchange sent by one of the stations.
No more than three QSOs may be claimed where the same station is one of the sides. Every one station gives points only once on each band.
Scoring is the same as for other categories. SWLs own geographic coordinates are used for geographic coordinates' points calculation.

8. Awards
Plaques will be awarded to the world's 1st, 2nd and 3rd scores in every category with five or more participants.
Certificates will be awarded to the 1st, 2nd and 3rd scores in MULTI-ONE, SINGLE-OP ALL HIGH and SINGLE-OP ALL LOW categories in every continent and among polar stations.
Special achievement certificate will be awarded to every participant with 100 or more confirmed QSOs.
All certificates will be arranged on the RAEM contest web site (raem.srr.ru) as JPG files for downloading and printing.
Sponsors are welcome (contact Organizing Committee).

9. Log
1. Electronic log submission is required for all logs which may come in 1st to 10th position in each section.
2. Please send logs in Cabrillo format, and be sure to include the full exchange. A single file must be attached to one email. Name the file "CALL.CBR" where "CALL" is your callsign in the contest. Put your callsign and category in the "Subject" line of the Email. Arrange QSOs in chronological order. SWLs may send any suitable file format: Excel tables are preferred.
3. All entries must be emailed or postmarked no later than 30 days after the contest (January 28, 2014).
4. Logs sent after the deadline or received more than 45 days after the contest may be used as checklogs only.
5. An additional time period for log submission can be requested by any participant: if this is required, send a request to the Contest Committee.

10. Address
WEB-interface: www.logs.raem.srr.ru
E-mail: raem@srr.ru
Postal address: Alex S. Pashkov, P.O. Box 177, Novosibirsk, 630032, RUSSIA
Contest home page on the Internet: raem.srr.ru

11. Computer software which supports RAEM contest
TR4W: www.tr4w.com
N1MM: www.n1mm.com
AALog: www.dxsoft.com
RLOG: www.rw0lbm.qrz.ru

27 December, 2013

Hello dear HAM-s, citizens of PEACE MESSENGER CITIES
Did you ever want to  be a multiplier in some contest but your dreams didn't come true?
Now it can BE DONE!
As  you are the citizen of  this town, member of Peace Messenger Cities , it means,  that your city   counts as a  MULTIPLIER  in a WW PMC contest.
Please visit our web page www.s59dcd.si Band  check  the rules for WW PMC contest.
The contest starts on  the first full weekend in 2014 (04/05th January).
For any question you can write to info@s59dcd.si
If you are not interested in contest,  please  share  this  email to your  friend from your city.
Merry Christmas and best wishes for you and your's in new year 2014.

Rajko Vavdi, S54X

13 December, 2013

Home made 144MHz. transverter


Huh? Home made ​​transverter.

 How difficult and expensive to buy transverter to 144Mhz. I decided to order a new one and it Velka with pleasure!
The basis of the classics ... mixer who serves on TX & RX and high-quality filter to miss the receipt and delivery.
It turns out big but I do not like mini things, and other elements are "normal"!
The filter consists of three coils (silver) and air trimmers ... the coils need to be away from the weight of 10 mm and between them came bulkhead!
That's it! Below you is a photo comic creation of printed circuit boards to soldering filter ... of course filter tested and tuned by using the dip-meter!

Without it, it is quite difficult to do.



All activities and the construction of the high frequencies are performed on double press for greater good grounding and various problems that can occur ... fluctuations, etc.?
Soldered, measured and tuned ... input and output circuits .. there still baffles come from vetronita!
Fine tuning is done when all the parts are soldered, TX & RX is close to 50 ohms so as to adjust the working conditions!
Here the input air trimmers and exit with "ordinary"! Excellent .... 5 turns and 10 pF, and here we are .. at 144 Mhz .... plus or minus 10 MHz up and down ..... without Dip meter is not known where the circuit works? There somewhere? And it can vary up to 20 Mhz? Ham is not one if you do not know telegraphy and has a grid dip meter !


It is after the mixer section .... the mixer has a of certain loss, so after he puts a good FET J310 and resonant round at 28 MHz in the performance the PI and it is adapted to the impedance is 50 ohms!
Transverter is connected to the base unit with a coaxial cable 50 ohm!
On the picture you can see ... blue .... small relay at the entrance to the transverter to switch TX & RX,
  pot with a wheel of 28 Mhz elements and FET and mixer SRA-second

So connected LO "bricks" of 116.000 MHz and the output is connected to the Icom IC-703 at 28 MHz.
The thing hinder it working and the signal from the Dip-meter hear thunderous!
Weld the entrance area .... VF and put CF300 gas fet .. purchased on eBay by 1.2 E. piece ...

  Test and second LO .... this with a crystal of 116.000 MHz .. crystal KWG and exactly at the frequency!
The second picture .... signal generator that goes high and working UFB ... miracle of instrument

Now we need to solder blocks, electrolytes and small resistors and 100 mA stabilizer,
The CF 300 should be stabilized voltage 8 or 9 volts.
Last fet mounted and from below so that connections are as short as possible in its surroundings.
First, set the frequency 144,478 MHz where our local beacon and immediately heard.
Furnished circles ... input filter and the strongest reception by the meter!
Barriers are not yet built and drive does not fluctuate ... operate normally.
Well .. it's a double press on the plate ... weight up and down lines.
Here's a picture .... second round after a fet?
It can be seen that the air trimmer almost completely open ... need to play with the branch and a little constrict coil ... with contraction circle goes on a lower frequency.
Thus, the trimmer is a semi open ratio L / C is good ... these are all little things that need to know when these constructions.


Soldered bulkheads between the input and the filter.

Here's a little "paper"!
From the first scheme is used ... filter .. mixer and splitter rx-tx after him, and transmit and receive part of the MOSFET!
From the other was taken post mixer amplifier with J310!
The second scheme is a complete transverter.

Draft .... the upper hand ... this is crossed out on the double Vitroplast dimensions are 23x8 cm!

 Soldered to the output section .... BF964 MOSFET and goes out 5mW.


                                                           To be continued , little HI !

10 December, 2013

Emergency Antenna Platform System (E-APS)

                                              Cool  !