October 02, 2014

VU2NAN (Nanda)

Crystal Radio with speaker output

This is the speaker variant of my my crystal radio with series-tuning and a better detector.


Load impedance of the transformer/speaker combination equal to that of balanced armature headphones (around 300Ω) would be possible using a 100:1 transformer and a 3Ω speaker.

The requirement of a transformer with low losses would be met by power transformers with their inherent thick conductors.

Thus a 230V/24V power transformer would satisfy both requirements.

As expected, successive trials with transformers rated 230V/24V-2A, 230V/24V-5A and 230V/24V-15A proved that the last one is the best.

Antenna is a 60' random wire.
_______________________________

Posted at: October 02, 2014 05:51 AM

October 01, 2014

G3XBM (Roger)

472kHz activity

This evening, I am sticking on 10m in the hope of the band reopening for real DX or opening very early tomorrow morning.

By now, I usually QSY down to 472kHz, where there is a lot of activity this evening with 49 stations listed on WSPRnet a few minutes ago.

UPDATE 2230z:  Late change of plan. I have QSYed to 472kHz WSPR after all.

Posted at: October 01, 2014 11:23 PM

Quiet start on 10m WSPR this afternoon, so far.

This afternoon has been very quiet, so far, on 10m WSPR. Yes, it could rapidly change but this afternoon so far it is just G0LRD,  G0VQH,  G4IKZ (all locals) plus G8JNJ/A (184km). So far, no DX this afternoon seen here.

After the last week or so, you get to expect W's to be pounding through.  Guess you can never take 10m for granted. Maybe this is a blackout and normal 10m propagation will return soon?

UPDATE 1415z:  OZ7IT (853km) spotted at 1354z.  Some life about on 10m WSPR  this afternoon, but no DX to the USA in evidence as yet, here.

UPDATE 1520z:  Firstly DK6UG (633km) was spotting me and now I am spotting K3NAL (5930km).  If it was a blackout it has ended as 10m is now waking up. 4X1RF (3519km) is a massive -2dB S/N signal with 5W.

UPDATE 1550z: Now being spotted weakly by French listener F59706 (560km). This probably Es but could be F2 backscatter.

UPDATE 1630z:   Looking at WSPRnet, I don't think there is a massive difference in results between G0LRD and me. He is doing better with his antenna, but tends to spot, and be spotted, by similar stations. G4IKZ on the other hand seems to get better results. He is using 5W and a Moxon antenna which has gain in some directions. This may give him an edge whenthe beam is pointing the right way. Nick's ERP will be nearly 20W in the best directions. He also has a gain on RX of 4-5dB in the best direction and probably a lower noise floor, because of his directionality.

UPDATE 1718z: 4X1RF has spotted me 14 times today so far. No further USA stations spotted or spotting me, so far, today.

UPDATE 1722z:  The brief appearance of K3NAL earlier underlines the usefulness of WSPR in "sniffing out" short lived openings on bands like 10m. This will prove even more useful in the quieter solar years ahead.

UPDATE 2035z:  Nothing from the USA for hours and hours. Just locals. 10m has been disappointing today.

UPDATE 2100z:   Now QRT on all bands.

Posted at: October 01, 2014 11:23 PM

W2LJ (Larry)

Peanut Power Sprint

Today was the NoGA QRP Group's 2nd Annual Peanut Power Sprint.


The event took place from 4:00 to 6:00 PM EDT, or 2000 to 2200 UTC. It was another beautiful day in Central NJ with sunny skies and a temperature of about 85F (29C) at Sprint time. I set up in the backyard, as I did for QRP Afield, using the PAR END FEDZ 40-20-10, supported by my 31' Jackite pole. I bungeed the Jackite to my kid's old wooden swingset (which I serioulsy have to thing about taking apart and discarding now that they're both teenagers).

I ended up working 47 stations - 1 on 15 Meters, 6 on 40 Meters and the balance on 20 Meters. There was a lot of activity, which was a good thing.  I thought 40 Meters would have been more productive than it turned out to be; but there was a ton of RTTY activity as this weekend was the CQ WW RTTY contest. 40 Meters was wall to wall with RTTY almost as far down as 7.035 MHz.


Something happened though (two things actually) that made me want to facepalm. The first instance occurred when I was running a frequency on 20 Meters. I was calling "CQ NUT" and was working stations at a good clip, in excess of a rate of 60 an hour (2 stations per minute is phenomenal for me). Then, a very loud station called me and after we completed the exchange, HE started calling CQ on the frequency! The frequency that I had been running!  I know no one "owns" any particular frequency, but I thought it to be very bad form.  I would never work a station calling CQ and then start calling CQ myself on that same frequency after working him! What was he thinking?

The other incident was my old pet peeve.  Once again, I was holding a frequency (after having moved from the first incident) and was working a rather weak station, when someone started calling CQ on our frequency with out even bothering to "QRL?".  I can't stand it when stations just hop on a frequency and start using it blindly without checking to make sure if it's already in use. Another instance of bad manners. Then, to make matters worse, I tried working the station in question, and I got a response of "DUPE WRKED B4".  Not in my log, we didn't!  But that did prove to me that he was able to hear me, and if he was able to hear me, then he also heard me while I was trying to work that weak station - when he jumped in without QRLing.  Thanks to Elecraft, though, for designing the KX3's superb filtering.  I was able to notch out the offender and completed the QSO with the weak station who was using an output power of 900 milliWatts.

Those two incidents notwithstanding, I had a blast! Many thanks to the NoGA QRP Group and the organizers of the Peanut Power Sprint for a very enjoyable afternoon.

Posted at: October 01, 2014 10:26 PM

WA5ICA (Michael)

Code of (bad) Conduct

I listened with growing amazement yesterday (9/30) while waiting to see if I could get a chance to work 8R1AE as he repeatedly pleaded for JA only, and a California ham kept calling over his QSOs, calling after again JA only was requested, and generally making a pest of himself until Peter finally worked him just to get him to SHUT UP.

So, Bruce, do you really think you’re in his log? I would bet you’re not. I would have done the same thing – worked you just to get you to go away and then thrown the QSO in the trash.

 

Posted at: October 01, 2014 09:21 PM

EA1CS

La Qsl de DX8DX, OC-188


Gentileza del Qsl mánager Charles M0OXO.

Puedes solicitar tu tarjeta haciendo click aquí

73´s, Luis EA1CS

Posted at: October 01, 2014 09:53 PM

9I50JO, Zambia



Con motivo del 50 aniversario de la Independencia de Zambia, Brian 9J2BO estará activo como 9I50JO del 15 al 30 de octubre 2014. Sabéis que a Brian se le suele escuchar en 15 y 10mts/cw por las tardes, con buenas señales.

73´s, Luis EA1CS

Posted at: October 01, 2014 09:50 PM

PJ7PK, NA-247 ( NUEVA IOTA)



Un equipo de 5 hombres planea estar4 activo desde  Guana Key of Pelikan (IOTA NA-247-NEW), aproximadamente del 6 al 10 de octubre 2014.

Alquilarán un yate de 40 pies de Lagoon Marina, St Maarten, utilizando el indicativo PJ7PK , toda la activación depende de un buen clima y el estado del mar.

Guana Key of Pelikan  es una pequeña isla situada frente a la costa sureste de St Maarten. Su elevación es de 17 metros sobre el nivel del mar - y con un terreno rocoso,  todo lo contrario de la paradisíaca isla dejaremos atrás para activar esta NUEVA IOTA .

La actividad será de 40-10m, en CW y SSB.

Un QSO es suficiente cuando se trabaja cualquier IOTA. No es necesario volver a llamar en otras bandas - por favor, dar a otros la oportunidad de trabajar esta nueva IOTA- gracias!


73´s, Luis EA1CS

Posted at: October 01, 2014 09:46 PM

G3XBM (Roger)

New WSJT-X software

WSJT-X is now available as a new public release V1.4.0 from Oct 1st 2014.  At the moment this will still be a beta version and further improvements are likely in future releases.

See http://physics.princeton.edu/pulsar/K1JT/ for more details.
Important changes in version 1.4 relative to v1.3, r3673 include the following:

1. CAT control for most radios is much improved, including expanded support for Commander, Ham Radio Deluxe, and OmniRig.  One-way CAT control is no longer generally supported.  Users may choose no CAT control, or may have working two-way communication so that WSJT-X can verify that commands sent to the rig have been executed.  "Split" mode  operation is supported via HRD for radios where HRD provides the  necessary control functions.  WSJT-X can now simulate Split mode for rigs that do not provide it.

2. Many options previously found on the Setup menu now appear on a far more flexible "Settings" screen.  You can define multiple spot operating  frequencies per band.  All recognized amateur bands are supported, and  frequency offsets can be configured for transverters.

3. There has been considerable polishing and extension of the user  interface, including optional user-defined waterfall palettes and fonts for the main screen, decoded text areas, and Astronomical Data screen.

4. The JT65 decoder now accepts negative values of DT down to -3.2 s, eliminating most of the occasional "garbage decodes" produced by poorly time-synchronized transmissions.

5. Better (glitch-free) behavior of audio streams.

6. Better handling of messages that include compound callsigns.

7. Support for standard "localization" conventions.

8. Writable files now appear in platform-dependent standard locations, allowing for more efficient installation on all supported platforms and  user settings to be seamlessly carried forward during program upgrades.

9. A new WSJT-X User Guide is available at
http://www.physics.princeton.edu/pulsar/K1JT/wsjtx-doc/wsjtx-main.html .  Additions and changes will continue to be made, as needed: please send us your suggestions for improvements!

In addition these listed improvements there are many internal changes aimed at cleaning up the code, establishing a standard set of  compile-and-build tools, and making the whole package more readily maintained by an active development group.


KNOWN PROBLEMS
--------------
WSJT-X v1.4 cooperates with Ham Radio Deluxe much more reliably than v1.3.  However, the good behavior can break down when HRD Logbook or DM780 are also running in parallel.  You may see delays up to 20 seconds or so in frequency changes or other radio commands, due to a bug in HRD.  HRD folks are aware of the problem, and are working to resolve it.

It has not been possible to initially provide support for all radios via  HRD. We have built-in diagnostics that allow quick identification of the extra support needed to support untested rigs via HRD. We urge HRD users to try this new version and report back results. We will then add any missing support based on feedback from users as soon as possible.

About 25 amateurs, including all of the most active members of the Development Team, have been regular users of WSJT-X built from recent code revisions.  In addition to those mentioned explicitly in the  program documentation, we thank CT1EKD, DK6OV, G3PQA, G4YKQ, K2LYV
KF5OIM, N9JCA, NA7KR, PA0TBR, and N0URE for their essential help -- especially help with debugging rig control for specific radios.

Particular thanks are also due to Bill, G4WJS and Greg, KI7MT, who  recently have done much of the heavy lifting on the WSJT development front.

REMINDER: this is a beta release -- a candidate for official release as WSJT-X Version 1.4.  The program is stable, highly capable, and a pleasure to use.  However, almost certainly it has bugs that have not yet come to light.  One of your responsibilities is to report any anomalous behavior.  The most useful bug reports include any relevant
details on your setup and (if possible) instructions on how to reproduce the problem.  Please read the WSJT-X User Guide first!

We look forward to your feedback on this release candidate for WSJT-X 1.4.

    -- 73, Joe, K1JT (for the WSJT Development Team)

Posted at: October 01, 2014 09:09 PM

EA1CS

YJ0X, ¿ qué hace una estación piloto?

YJ0X Team / 1 octubre 2014

En sólo 2 días estaremos en Vanuatu, así que es un buen momento para recordar a todos sobre el propósito de las estaciones piloto. En la web tienes quienes son y como ponerte en contacto con ellos.

Este artículo de nuestro piloto jefe, Lee ZL2AL lo explica todo ( click )


73´s, Luis EA1CS

Posted at: October 01, 2014 07:13 PM

La Qsl y video de YW5D,SA-044


Gentileza del Grupo DX Caracas

73´s, Luis EA1CS

Posted at: October 01, 2014 06:19 PM

Intrepid-Dx Group friendship Tour por Irán



Paul N6PSE / 30 setiembre 2014

Los miembros de Intrepid-Dx Group han realizado y completado su gira amistad 2014 por la República Popular Democrática de Corea (Corea del Norte) como parte de nuestro proyecto P5. Ahora están a punto de comenzar su gira amistad 2014 por la República Islámica de Irán.

Nuestros países tienen una larga y enredada historia juntos y esperamos con interés la reunión con nuestros amigos en Irán y "plantar las semillas" sobre las futuras actividades en conjunto.

Voy a actualizar este post cuando sea posible durante nuestra visita a Irán.

73, Paul N6PSE

73´s, Luis EA1CS

Posted at: October 01, 2014 06:18 PM

F5IRO (Freddy)

Radio Noticias

Le magazine gratuit Radio Noticias de nos amis Espagnols d'octobre. lien

Posted at: October 01, 2014 06:01 PM

G3XBM (Roger)

Nick G4IKZ monitoring 10m WSPR now

Local G4IKZ has been monitoring 6m most of the summer, but I notice he is looking on 10m today but so far is seeing just G0LRD and me.

I was wondering how efficient my antenna is on 10m compared with others. It is pleasing to see that Nick is not copying that much either. I think he uses a 10m Moxon beam, but no idea which way it is aiming today. He is getting me much weaker on 10m than on 6m. I believe my Par 3-band end-fed is somewhat down on an optimised 10m antenna, but not too badly.  Certainly not enough to worry about. I seem to be spotted quite widely if I run 2W.

I suppose a more efficient 10m antenna would (maybe) allow me to use 200mW instead, although in RX I copy most stations in all directions, quite well on 10m. The Par also does a decent job on 20m and even 40m, even though quite low and just strung to a tree in the garden.

For several weeks now 10m has been open to Europe at some time in the day. It was open to Spain and Israel this morning. Most days it has opened for F2 DX to places much further away.  So far, this afternoon is exceptionally quiet on 10m WSPR.

Posted at: October 01, 2014 03:30 PM

Australian 472kHz transverter

See http://www.vk3xdk.net46.net/89_31_600M-472Khz-479Khz-Transverter-V2.html . This is a 472kHz, mostly SMA parts, tranverter which is available from Australia for 180 Oz dollars ready built and tested. That is around £90, but this does not include shipping or duty. The transverter uses a 28MHz packaged oscillator. My own design (see www.g3xbm.co.uk website) is built "dead bug" style. Both the VK3XDK and G3XBM designs put out about 12W into a 50 ohm load. 472kHz is a fascinating band and even very compromised antennas work.  I have nothing special WRT antennas. I tune up the feeders to my V2000 vertical and Par end-fed and use a mains earth. This far from ideal arrangement gets out ( best DX is 896km with 5mW ERP and best RX DX is 1190km so far this season).

Recommendation: give 472kHz a go.

Posted at: October 01, 2014 03:08 PM

PD0AC (Hans van Rijsse)

Vero Telecom VR-6600PRO

R.I.P. VR-6600P: the radio has been replaced before it even saw the light of day. Instead Vero Telecom introduced the VR-6600PRO, an updated version of the radio we all so desperately wanted to get our hands on. Vero writes: Hello … Continue reading

Posted at: October 01, 2014 11:49 AM

G3XBM (Roger)

10m WSPR this morning

Luckily local G0LRD (25km) pointed out that I was showing the wrong ERP on 10m on WSPRnet. Although ERP is 5mW on 472kHz it is 2W on 10m. For some reason WSPRX did not save the 33dBm setting when I changed bands earlier.

4X1RF (3519km) as spotted me 4 times already and EB5DQ (1405km) has been seen here 3 times so far.

Sunspot count today is 166 (with blackouts) and 20-30Hz forecast is "fair".

Posted at: October 01, 2014 12:43 PM

472kHz overnight

Last night was a good one on 472kHz with some decent distances copied including IW4DXW (1190km) on a couple of occasions, albeit very weakly.
Unique 472kHz WSPR stations seen overnight
In the other direction, my 5mW ERP was copied by 7 unique stations.  I think G8LCO is an all-time new reporter, but I need to check. Unfortunately WSPRnet only goes back 2 weeks.
Unique 472kHz WSPR reports using 5mW ERP


Posted at: October 01, 2014 12:24 PM

W2LJ (Larry)

School Daze

A daze, that's what it was.

Last night was the second session of our eight week Technician class license class. I think some of our seventeen students walked out of the building with dazed expression on their faces. And I guess that's to be expected right now, as we're out of the introductory "This is Amateur Radio" feel-good fluffy part and we're now into the heart of the course, which is basic electricity and components and all the good stuff.

The concepts of current, resistance, voltage were easily digested by their inquiring minds. The concepts of capacitance, inductance, reactance and impedance? Not so much. But Marv K2VHW and I broke it down into the simplest "lay terms" that we could and I am pretty confident that they have a basic, rudimentary (if not shaky) understanding of the concepts.  I am trying pretty hard to find "real world" equivalents that they can relate to, so these concepts don't totally fly over their heads.

I have to admit that back in Ye Olden Days, when I was studying for my Novice license, I wore the very same expression on my face when I left those sessions each Tuesday evening in October and November of 1978.

If you have no concept of electricity and electronics, it CAN seem daunting. But if our students do the required reading, and maybe even do a little Googling on their own, they will have that "Aha moment!" when it all comes together.

As a class, they have several things going for them. The first is that our young students are whizzes at note taking.  While Marv is handling the teaching part of a segment, I try to keep an eye on our charges, to watch facial expressions and such.  The younger students have their highlighters and pens going at warp speed, taking notes and marking pertinent paragraphs and sentences in their license manuals. The older adult students are no slouches, either.  But there's one important difference - their facial expressions are more telling.  While the "kids" are sponges, absorbing all this stuff, every now and then, I will see one of the adults screw up their faces as if to say "What?!?"  It's at that moment when I will try to pause things for a bit and try to interject an example or some such thing that they're familiar with that brings the concept home to them.

The important thing that we try to stress as much as we can (without beating them over the head with it) is that they HAVE to do the required reading homework.  This way, we can answer any questions on any sticky points that they might have. We also give them the reading material that will be covered in the next week's lesson, so that they're not walking into the material blindly.

These two weeks will probably be the very hardest of the eight week class.  Electrical concepts and components last night. And next week, electronic and basic radio circuits.  After that, we'll get into "the good stuff" - propagation, antennas, operating procedures, setting up a station, etc.  That material is probably more in line with what they expected when they were signing up for an Amateur radio course.

I will make it my business during this coming week to make up a handout with some Internet sources that they can refer to in order to make the "meat" that they were fed last night just a little more palatable.  As any licensed Ham knows, this is an ongoing process that doesn't end with passing the test. In fact, it's just the very beginning.

72 de Larry W2LJ
QRP - When you care to send the very least!

Posted at: October 01, 2014 11:29 AM

F5IRO (Freddy)

Morse Express 2014 Christmas Key

Un manipulateur sera proposé pour les fêtes de noel par Morse Express, support en acajou et mécanisme chromé. Le catalogue général est aussi mis à jour. lien

Posted at: October 01, 2014 10:12 AM

Planning des expéditions

Le planning des expéditions pour le mois d'octobre par DX WORLD ou Hamradioweb

Posted at: October 01, 2014 10:12 AM

Microsoft : ce sera finalement Windows 10

"Microsoft a levé le voile sur la nouvelle version de Windows et surprise, il ne s’agit pas de Windows 9, mais… de Windows 10 ! Un choix un peu étrange, mais entre XP, Vista, Me et autres 95, pourquoi pas...." suite

Posted at: October 01, 2014 10:12 AM

September 30, 2014

G3XBM (Roger)

10m WSPR - is that it?

The last USA station was K4RCG (5995km) at 1932z. Unless the band opens again, I suspect that the worldwide openings may have ended for the day. With Australia, Reunion, Uruguay, Israel, the USA and great swathes of Europe in the log, it has been a good day on 10m WSPR.

Posted at: September 30, 2014 10:48 PM

G4VXE (Tim)

Noble Radio NR4SC update: strong signals

I had a few minutes to play in the RSGB 70MHz activity contest this evening. Although I was still only using the vertical antenna which is not ideal for such activity it proved a useful session.

Neil G4BRK my nearest 70MHz neighbour was on and going well. His signal was well over S9 and it is a compliment to his signal and to the NR4SC's receiver than he was gone within about 4khz either side, which I was quite happy with. M1PRO, a little further off were also rattling the s-meter and easy to lose a few khz either side.

Most distant signal heard was from Keith G4ODA in IO92/Spalding.

A 70MHz HB9CV antenna arrived today, so I'll put that together at the weekend and see what can be done.

Posted at: September 30, 2014 10:30 PM

G3XBM (Roger)

FR1GZ WSPR

Just took a look at http://wsprnet.org/drupal/wsprnet/spots for FR1GZ spots both given and received. It is amazing that he has so many real DX reports in the log. I guess this is partly because Reunion Is is very remote. Already he has been spotted here 14 times and he has spotted me 3 times so far today.  Many of his reports are greater than 16000km .

Posted at: September 30, 2014 10:02 PM

F8BON (Patrice)

Concours : votre avis intéresse la commission concours du REF !

Depuis quelques années plusieurs questions et suggestions sont régulièrement posées sur les évolutions des règlements et du championnat de France en particulier. La commission a donc décidé lors de sa dernière réunion de demander leur avis aux premiers concernés: les contesteurs français… voir la suite et  pour participer la commission des concours du REF

Posted at: September 30, 2014 07:23 PM

F5IRO (Freddy)

Convention du CDXC

La 36 ème convention du Clipperton DX Club vient de se terminer à Issoire au 28° régiment de transmissions, où un peu moins de 110 membres de l'association ont fait le déplacement de la France entière ainsi que de Belgique, Suisse, Grèce et Martinique. Le soleil était au rendez-vous, malgré une météo capricieuse annoncée. Avec F5RQQ l'accueil a commencé dès vendredi après-midi... la majorité

Posted at: September 30, 2014 07:48 PM

G3XBM (Roger)

RSGB president request

Today I was asked if I could provide a photo of my 8.97kHz TX so the RSGB president could use it at a convention in Northern Ireland. I was happy to oblige.

If anyone else needs to use photos from my website at www.g3xbm.co.uk or this blog I am usually happy to say "yes" but it is polite to ask first.

Posted at: September 30, 2014 07:45 PM

"Poor" 20-30MHz conditions?

Sunspot count has fallen to 160 today and 20-30MHz conditions are supposed to be "poor" yet on 10m VK3KCX (16883km) has been spotted 6 times on 10m WSPR today, spots have been exchanged with FR1GZ (9724km) multiple times, CX2ABP (11127km) has spotted my 2W WSPR more than once and 4X1RF (3519m) has been spotting me multiple times and 10m is wide open to the USA! 10m really is a truly fascinating band.

There is no shortage of Europeans on 10m WSPR either. Not sure if they are being copied by F2 backscatter or Es.

Posted at: September 30, 2014 06:22 PM

EA1CS

5R8M....todo está listo

Gentileza de 5R8M web

Equipo, equipos, licencias, etc, ... todo está listo para esta nueva aventura.



73´s, Luis EA1CS

Posted at: September 30, 2014 05:10 PM