Moonbounce or EME

This is a part of our hobby I have never done and am unlikely to do. Moonbouncers are a special breed with excellent equipment carefully optimised, low noise preamps and usually lots of power and a big steeraable antenna capable of tracking the moon in the sky. I am full of admiration for those who take the time and effort to overcome the immense technical challenges. With new digital modes EME is a little easier and some people with single horizontal yagis and more modest power are able to work larger stations off the moon. For me, it is all a step too far though. I shall stick to VLF, LF, MF, lightbeams, QRP and WSPR.

5mW on 40m WSPR

With considerable difficulty (because of my stroke) I made a 20dB attenuator to reduce my 500mW down to just 5mW. This attenuator is right at the FT817's output coax connector. It also reduces the RX signal by 20dB too of course. Let's see what happens!

Normally such a small project would take just minutes but I found the whole job hard work taking at least twice as long. In the same way, PC work takes me longer as I am forever correcting  typos.

My 5mW has been spotted locally once and in Denmark 853km away on 2 occasions and once in Holland. Results are in line with expectations so far. Sunspot count still good at 95. The last report of my 5mW signal was at 1744z. It must just be popping out of the noise with a few stations, rarely. I'll leave running overnight to see what happens.

On RX I see I spotted VK6XT, even with a 20dB pad in the antenna line.

RX reports (mine) with 20dB pad in line on 40m

40m 5mW WSPR spots this afternoon

Best Amateur Radio and SWL apps

The excellent Southgate ARS News page had a link http://wp.me/pn3uc-2cL to the best apps for smart phones (iOS and Android). If you have such a device some of these apps are worth considering.

500mW on 40m WSPR

Following on from the 500mW 10m WSPR tests yesterday and the 2W 40m WSPR tests overnight,  I am now going down to 500mW WSPR on 40m to see what spots I get. Initial results are encouraging with plenty of western European spots at 500mW to the (inadequate) antenna.

40m 500mW WSPR spots this morning

Optical Comms in Vancouver Canada

This morning I received an email from Steve, VE7SL, reporting on his experiments with VE7CA over a 2-way distance of 54km using red LEDs.  They are doing really well and Steve is writing an article for a Canadian journal. They seem to have been encouraged by my own modest efforts,which I hope to restart before too long. At present my poor fitness and temporary inability to drive because of the stroke are real handicaps.

Image of optical path spanned from VE7SL

40m WSPR this evening

As 10m has closed here, I've moved my WSPRing to 40m at 2W RF.  The band sounds quite quiet here, but I have been spotted in Israel (4X1RF) at 3519km as well as in plenty of European countries. I am also spotting plenty of others on the band even though my low Par antenna cannot perform brilliantly on the band. A few weeks ago my 1W out on 40m was spotted in Australia with the same Par antenna.

Morning update: Overnight some Stateside DX was in evidence.

40m unique WSPR spots (36) with 2W since last evening

Ten-Tec Argonaut VI 1-10W QRP HF transceiver

In my recent QRP rig comparison I omitted the Ten-Tec Argonaut VI.

http://cdn2.bigcommerce.com/server1500/ooh0w/products/358/images/724/539_web_photo__37987.1373600182.1280.1280.jpg

By all accounts and reviews this is a CLASSY little HF radio, with very good performance figures in a neat and simple desktop design. People have compared its performance to the Elecraft K2,although it is considerably smaller. Size wise it is little larger than the FT817ND. The major drawbacks in the UK are price(see below) and the lack of 60m, 12m and 6m coverage. (No 2m or 70cm coverage too). If these are not important considerations and you want a small desktop QRP radio then the Argonaut VI may be worth considering.

See http://www.tentec.com/argonaut-vi-qrp-1-10-watt-transceiver/
and http://www.eham.net/reviews/detail/10849 

In  the UK Waters and Stanton supply this rig, but the current price is £999.95, which is very expensive compared with its competitors, even though a very nice transceiver.

500mW tests on 10m

In preparation for building the Ultimate 3 WSPR beacon for 10m, today I was using 500mW RF on transmit. Reports from LZ and IT9 this morning looked promising. I suspect my current 10m antenna (the Par 10/20/40) may not be that brilliant or is directional.  A vertical may be a better choice.

Currently it seems MUCH harder getting spots with 500mW than with 1 or 2W RF. Probably the signal is being buried under others?

In the afternoon the band opened to the USA and Canada with reports from the usual suspects, but less often than with higher powers. The band closed transatlantic today here at around 1640z.

500mW 10m WSPR spots received today

Wintertime Es on 10m?

In amongst the DX calls today I notice callsigns from 4 European countries. I assume the propagation was F layer or F layer backscatter, but it could be wintertime Es which peaks in the northern hemisphere around Dec and Jan. Signal levels suggest Es may be more likely. All the more reason to use WSPR to seek out fleeting Es openings that might otherwise go unnoticed at any time of the year.

X1M 5 band QRP rig for £250?

See http://www.radioworld.co.uk/catalog/x1m_5-band_qrp_transceiver_kit_platinum_edition-p-11014.html?gclid=CMW2oamQg7wCFWcUwwodgyAAjQ  at £329.

This small Chinese transceiver is available for £329 from Radio World (and probably others).

To me, it still looks cheap and nasty, basically an immature product. The time will come (and quite soon) when Chinese QRP rigs will mature and steal the business from the "big boys" from Japan. The Yaesu FT817ND and the Elecraft KX3 will soon be under BIG price pressure.

The best price is reported to be £250 - a LOT less than its competitors.

Ultimate 3 beacon - GPS module

The GPS module for the Hans Summers WSPR beacon to provide QTH locator and very accurate timing is now back in stock so I have ordered one. It needs a 3.2V regulated supply.

Reduced 10m power from 2W to 1W on WSPR

The Ultimate 3 WSPR beacon kit (on order) gives about 130mW out from a 5V PA supply on 10m. Using a 12V PA and more FETs in parallel should lift this to >1W out, so today I have been using 1W out to see what spots I get. Actually, so far, results are much the same as with 2W.

1W 10m  unique WSPR spots today

UPDATE 1244z:  10m band just opened to the USA. Absolutely no problems getting stateside spots at 1W rather than 2W.  Tomorrow I shall use 500mW. Stateside spots ended for me at 1716z.

10m - wide open again

Yet again my favorite band is wide open to Israel, S.America and to North America. Conditions on the band have been excellent for weeks.

UPDATE 1730z:  Band still open transatlantic, 1 hour after dark here, but sounds dead at 1800z.

Bandplan annoyances

Do people who write band plans never actually operate? This morning I saw the latest RSGB band plans in Feb 2014 RadCom and almost tore up the magazine.

For example, and yet again, 10m AM which to my certain knowledge has occupied 29.0-29.1MHz  for YEARS and YEARS and YEARS is not even mentioned and 144.55MHz,which has been the 2m AM centre of activity for many years is mentioned begrudgingly just in a footnote as if AM  was disgusting! Yet we have a FAX calling frequency! Why is the RSGB so blatantly anti-AM?

Frankly I am appalled. Idiots.

10m transatlantic - yet again

10m is again wide open across the Atlantic again this afternoon. In fact, since coming out of  hospital on Jan 3rd it has been wide open more or less every afternoon that I have checked. Sunspot count remains good.

1710z:  10m band was still wide open across the Atlantic, then someone turned the lights off here!

Australian QRP reports on 3 bands

Today VK6XT copied my 2W WSPR signal on 10m at 14719km. This now means my QRP WSPR has been copied in Australia on 10, 20 and 40 m these last few weeks. HF conditions are clearly in good shape of late.

VK on 10m this morning

10m is again in great shape with a couple of VK spots in with the other stations this morning. The following are the unique stations spotted on 10m WSPR. In most cases,stations were actually spotted multiple times.

10m unique WSPR spots this morning

10m still good transatlantic

Although I did not get on the band until mid afternoon.the band is again wide open with plenty of USA and Canadian stations coming through plus a CX station from S.America.  Sunspot count is still well over 100 which helps.

Update 1815z: 10m is still wide open almost 2 hours after sundown here is Cambridgeshire.  Conditions are good. Now at 18.35z the spots have stopped so I suspect that is it  for this evening.
.

More on the Ultimate 3 kit

Hans Summers G0UPL has answered my questions so I am going to buy a kit for 10m WSPR use. As it stands the 10m output is 131mW from a 5V PA supply, but this can  easily be increased. I think 2W is a more useful level. At well under 40 UK pounds including GPS this is good value.

Update 1600z:  the 10m WSPR beacon was ordered today but not the GPS unit which is out of stock. This kit will be a test of my current abilities (building wise) following the stroke.

Ultimate 3 WSPR beacon with GPS timing

Image is at http://www.hanssummers.com/images/stories/ultimate3/1/2.jpg

Hans Summers has a new beacon  kit that allows full "stand alone" (no PC needed) WSPR beaconing. It is available for just  £17.50 with a low pass filter for any particular band plus £14 for the high sensitivity GPS module and patch antenna. I believe power out is around 150mW but this can be increased. As I understand it, it means, for example, a 10m WSPR TX beacon that does NOT need a PC can be made for under £40 even building a separate PA and putting it into a nice box. The unit also does other modes like QRSS and HELL.

See G0UPL's website at http://www.hanssummers.com/ultimate3.html .

I shall have to build one to free up the FT817.

10m GDX and DX

After last evening when even 20m was dead as a dodo,10m WSPR was lively this morning both for GDX and DX. I suspect the GDX (184 and 121km) may have been back scatter although the Doppler (3Hz) suggests possible aircraft scatter. All the more surprising not to get G3WKW the other evening (134km). The DX exchange was with a DL station in the Canary Is (West Africa). This could be F layer or  winter Es.  Sunspot count 134. Later 4X1RF spotted me at just over 3500km. The first USA station (an N2) was seen at 1322z today (7088km). 10m looks in good shape today. It was still open (for me here) to the USA/Canada at 1728z. At the moment (1900) the WSPRnet database is down, so I cannot check if 10m is open to the USA for others.

10m WSPR until around 1300z today.

Mizuho transceivers

Although, I  think, Mizuho transceivers are no longer being made, these were popular in the 1970s and 1980s. Most common were the single band SSB/CW handhelds for most HF and VHF bands. I still have a 200mW pep 2m rig. Battery life was poor but otherwise they were excellent radios. Mine (MX-2, 2m SSB/CW) was used with HF transverters mainly and DX over 9000 miles was worked on 10m. On 2m it worked some impressive DX handheld in 2m contests.

See http://www.mizuhoradio.com/mx.html

FT450D 100W radio

This Yaesu 100W radio is now £669 with the Yaesu £42 rebate whereas it was over £800.  I suspect even lower is possible for cash by negotiation with the dealer.

There are a couple of technical issues with this rig that bother me: the VFO shaft encoder failures and TX hum. Both issues are meant to be fixed now but I wonder if they are good, proper fixes? 100W is more than I need but it can run at  much lower power and does include 50MHz and has an excellent RX.

Continued 10m WSPR tests

Today, I continued my 10m WSPR tests at 2W out: plenty of spots both given and received. This afternoon the power will be dropped to 500mW to see how many N.American spots I get still. The sunspot number is still good.

UPDATE 1244z: switched to 500mW out.  Still getting spots from Israel  and Canada  even at 500mW level.This is not surprising: as long as the QRP signal gives better than -30dB S/N it should still decode. The advantage of running 2W rather than 500mW is one is far less likely to be buried under a bigger signal,which can be an issue when HF bands are busy. Why some WSPR stations run 20,or even 100W out amazes and horrifies me. WSPR is a QRP mode, ideally suited to 5W or less.

10m WSPR TX at 500mW this afternoon

Conditions do not seem to be as good as of late with fewer 10m US stations copyable here.

UPDATE 1442:  switched back to 2W out. Plenty of VE and W reports coming through now again.

10m seemed to die out transatlantic about 2 hours earlier than last night (16.30z).

DSTAR question

Does anyone know if it is possible to access DSTAR networks using a Windows XP PC just using freely downloadable software? I am a DSTAR novice, as you can tell. It might be useful.

Failed 10m GDX test

Our evening time 134km 10m GDX WSPR test with G3WKW failed last night with no signals copied. This morning there was plenty of DX about (S.Africa etc) but I guess the GDX path on 10m was too far for 2W QRP.

In praise of the FT817

My FT817 (not ND version) has been owned from new way back when these radios were new "on the block" at the beginning of the millennium when the price was still £799. In all that time it has performed faultlessly, mainly at the 2.5W or less settings.

Mine has worked the world on SSB (even handheld) and I get WSPR reports worldwide at 1W, even on 40m with a small wire antenna. I  intend to buy a new FT817ND soon so I can WSPR and work other modes at the same time. I can honestly say my FT817 does all I want and with 5W maximum output, which is more than enough power to work DX without upsetting the neighbours.

The best UK price currently seems to be around £513 but I hope to pay <£500 cash. At the current Yen-Pound exchange rate more like £450 is a reasonable price, unless the dealers want to be greedy. I hope the price includes the NiMH battery pack , charger etc. At best, the UK price fell to below £350.

The newer ND version covers 5MHz and all of 7MHz and has more rugged PAs.

Health update

Following my brain bleed I am getting better. Since being home my walking has improved and my swallow is improving too. I have still to hear from the DVLA (driving licence people) but am expecting to be prevented from driving for 12 months. I have applied for a "blue badge" for disabled parking rights. Today I surprised myself by walking quite a distance with a stick at Angelsey Abbey. I still feel punch drunk most the time and need people near me to support me.

Slowly but surely   ...a step at a time.

Thank goodness for amateur radio and all the very good friends I didn't realise I had.

New Solar Peak?

The most recent high solar activity looks likely to mean a new second sunspot peak for cycle 24.  See http://www.solen.info/solar/ .

http://www.solen.info/solar/

This page was showing the peak as 66.9 (smoothed sunspot number) in Feb 2012 but expect to see this revised to a much later date! I find this site very useful.

6m GDX?

I get G8EPA consistently at 61km on 6m WSPR at up to -15dB S/N. This rather suggests that >100km should be possible inter-G on QRP 6m WSPR with a little patience. Anyone out there willing to give it a try?

10m 134km GDX tests this evening

This evening G3WKW and I are trying to span 134km on 28MHz WSPR. I run 2W to a vertical and Bob runs a little more.  Despite Doppler and rig drift problems we managed the path (just) on 144MHz this week.  28MHz may be much weaker but with far less Doppler and rig drift. We shall see. With WSPR about 12-14dB better than CW we have the best chance.

UPDATE 2200z: Nothing at all seen since 1816 (USA) and 1824z (Es).  Will keep looking but not hopeful. No GDX seen at all.

Chinese QRP transceivers

In my recent analysis of good value QRP radios I ignored the recent Chinese entries into the market. As far as I can see, these are still immature products, but they are getting better by the day. For example, see http://www.wouxun.us/item.php?item_id=302 . I judge this by how prepared would I be to buy a Chinese radio. The answer is not yet.

10m still brilliant

As 6m WSPR was only giving me inter-G signals today, I switched to 10m. The band is still wide open to North America and has been whenever I have checked in recent afternoons. Not one report  is from less than 5000km with 2W. Sunspot count is 178 which helps to explain the good conditions of late.  The good times will not last: make the most of them as it may be a long wait.

At 1716z the 10m band was still wide open to the USA, in total darkness here.Then the band just died for me here in East Cambridgeshire. And then, a full hour later KB9AMG (6300km away) and W8AC spot me at -22dB S/N. And it has been dark here since 1630z! At the moment it looks as if the band finally died cross-pond at around 1830z -very late for 10m.

Micro-40 DSB build

http://aa7ee.wordpress.com/2013/10/19/the-vk3ye-micro-40-dsb-transceiver/ has a beautiful description of the building of this little transceiver using Me-squares. There is  a complete walk-through of AA7EE's build - truly beautiful workmanship.

6m and 2m inter-G WSPR

Although inter-G DX is possible on 2m WSPR (witness the tests between G3XBM and G3WKW over a 134km path on 2m recently with 2W and a halo) the equipment drift and Doppler shift makes WSPR a marginal mode on 2m. Things on 6m are better and longish paths are possible.See the 6m WSPR results today so far below:

So far, only inter-G paths seem to be open on 6m today. The high drift figures are almost certainly due to aircraft Doppler.

Best value new QRP transenceivers

At  the moment the running order, ignoring wSDR designs, is:

• Elecraft KX3  - best RX, expensive with all options in the UK. n ternal auto-ATU option
• Ten-Tec Argonaut VI - excellent RX and ideal base station but no  5,24 or 50MHz coverage.Expensive.
• Yaesu FT817ND - excellent base/portable unit up to 432MHz,but RX not as good as KX3 or Argonaut VI. 13-14 year old design.
• Icom IC703 - excellent base transceiver,but no longer available new. Internal auto-ATU.

Overall, the FT817ND represents best value for money all things considered, in my view. It may be an old design but I can buy 2 FT817ND with plenty of change for the price of the KX3. And I get a better design for home station digital (WSPR) use with botj 144 + 432MHz bands. Even adding a Z817 or T1 auto-ATU to the price of the FT817ND units there is still change when compared with the fully loaded KX3.

Reviews on www.eham.net are similar for all radios listed.

10m still wide open

My first 10m WSPR transmission with 2W to a small antenna after lunch was copied in the  middle of the USA, in Canada, Israel and South Africa. Sunspot count today is 196. Conditions appear to be very good  still.

Oscilloscope-watch

John Mullin sent me this link which may amuse you.It describes a wrist wearable scope and frequency counter for $150.

http://www.ae5x.com/blog/2014/01/07/an-oscilloscopefreq-counter-on-your-wrist

First 2m WSPR results

This evening I got my first WSPR spot on 2m from G3WKW at 134km the other side of London in North East Hampshire. It was hard work with the unmodified FT817 because of frequency error,  drift, Doppler etc. Bob was visible with me but no decodes of his signal.

We should manage a 2-way QSO in due course with a more suitable mode. I was using 2W to a halo antenna. Bob was using 5W and a small beam.

The  next night I managed to decode Bob's signal (once only) although he was visible on most transmissions  but not decoding because of the Doppler shift.

NB post updated as I had G3WKW in the wrong county!

10m - often open

Although we are currently enjoying decent F2 long distance propagation on 10m, we must not forget that the 10m band is FREQUENTLY open by Es (sporadic-E) propagation.

The best months in the northern hemisphere are between late April and early September but the propagation can occur at any time of the year. This is very much a case where WSPR will be useful to winkle out brief periods of Es propagation. Sometimes multi-hop Es allows real DX to be workable.

Often Es signals can be very strong, but sometimes openings can be very, well, sporadic open briefly to one place with signals inaudible just tens of miles away.   In many ways Es is a more fascinating mode than F layer and one of the reasons 10m is my favorite band of all. Don't also forget inter-G propagation. In RSGB contests a few years ago it was possible to work out to around 100 miles with 10W SSB to dipole antennas. Imagine what the inter-G range will be with WSPR.