LY3LP's blogsite

This is a very interesting blogsite with lots to interest QRPers. I like the tunnel diode TX and the 6m projects. Some of the wind turbine blades are unusual. See http://sa555.blogspot.com/

1860 voice recordings

I missed this news from March 2008 about the earliest recordings of the human voice made in France in the late 1850s and early 1860s. American researchers pieced together a 10sec audio clip of a French folk song which they believe is the oldest recognisable recording of the human voice. A young woman sings from the 18th century folk song Au Clair de la Lune. It was made in 1860 by Edouard Scott de Martinville on a device he called a phonautograph. Listen to the sound clip here:
http://graphics8.nytimes.com/audiosrc/arts/1860v2.mp3

Edison's recording of himself reciting 'Mary had a little lamb' were many years LATER than these very early recordings. Totally fascinating!

Pye PF1 and PF8 handhelds

I've justed added a couple of pages to my website on two Pye Telecom PMR products I had involvement with in my early days in the development labs there.

See Pye Telecom PF1 Handhelds and Pye Telecom PF8 Handheld

For far more information on Pye Telecom see the website http://www.pyetelecomhistory.org/

Incidentally there is a drive to set up a permanent museum of radio history in the Cambridge area in which Pye Telecom products would be featured. £30k is needed to get this project off the ground. See the Pye Telecom History pages for more information on this project.

Sunspots and solar flux

The recent upturn in the sunspot count seems to have stalled a bit, although the rolling average does appear to point to an upturn which should result in improving conditions this autumn and winter. Solar flux levels remain below 70 still and don't seem in a hurry to rise.

However, 6m is still lively with sporadic-E and continues to liven up this magic band.

See http://www.swpc.noaa.gov/SolarCycle/

Another SixBox QSO

This afternoon I worked G3PTQ in Bottisham, 6kms away with the 50mW Sixbox AM transceiver. Report was RS41 (weak, but 80% readable). Then Terry mentioned he was using a low horizontal dipole, so signals could easily have been some 10-20dB (2-3 S points) stronger had he had a vertical antenna. This little transceiver is definitely proving useful for local 6m contacts.

IOTA contest - 10m QRP

For a few hours today I managed some operating on 10m QRP in the IOTA contest. No great DX (best was Cyprus) but I did work a couple of stations when running just 500mW pep. They didn't appear to notice the low power and still gave me 59! For a little while I tried calling some of the stronger stations with 50mW pep, but in the limited time I had the best I got was a G3X.. QRZ? at that power. With 50mW on CW it would have been quite easy.

Interestingly I heard GD (Isle of Man) and GJ (Jersey) on 10m SSB today. Both are usually too near to work or hear. Unfortunately I didn't managed to raise them. Pity as they would have been new DXCC entities for me on the band.

SixBox (6m) and FredBox (2m) - /P tests

This evening I managed 16kms contacts with both the SixBox 6m 40mW AM transceiver and with the Fredbox 2m 10mW AM transceiver. QSOs were from Aldreth, Cambs, to Swaffham Prior.

Signals from the SixBox were copied by Andrew G6ALB when I was TXing with a 6m 1/4 wave antenna on a magmount on the car roof. On the superregen RX there was solid copy of G6ALB's 6m AM signal. Andrew uses a Diamond V2000 vertical, which recent discussions have confirmed are NOT as effective as a true 1/2 wave vertical on 6m. Clearly if Andrew had even a 2 el beam the QSO would have been a very decent one.

After finishing on 6m QRP, we moved to 2m AM to try some tests with the 2m Fredbox. A solid QSO was quickly achieved with the 10mW Fredbox using the 6m 1/4 wave antenna on the car magmount. This acts as a 3/4 wave antenna on 2m. I then tried the same antenna on the Fredbox handheld. Again, a solid 2-way QSO at 16kms distance. Switching over to a 1/4 wave whip on the handheld Fredbox resulted in a weaker, but just usable signal and QSO (same signal level as on the 6m SixBox). Finally, I tried the Fredbox handheld with a small helical antenna. Although Andrew could just detect this, no real QSO was possible.

So, with the V2000 in use at the far end of the contact, 40mW AM on 6m was not as strong as 10mW AM on 2m. Notheless, it was fun to give both rigs a portable outing and make some contacts.

The picture shows me during the Fredbox QSO using the 3/4 wave whip on the Fredbox.

Ham radio and young people?

Last night I gave my "Kitchen Table Minimalist Radio" talk at the Peterborough Radio Club. Everyone was very welcoming and, to my surprise, there was a very good number of people there to hear me. Afterwards quite a lot of the group came up to take a look at some of the homebrew gear that I had made and talked about.

One thing that struck me, again, is how few young people there were there. Having given similar talks in 3 clubs in East Anglia now, one can count on one hand the number of youngsters (boys/girls) at the meetings. OK, it could be my subject did not appeal to them, but I think this is a more general issue and one that we HAVE to address seriously or the hobby will die with us in another 20 years or so.

The RSGB (and I suspect the ARRL) have initiatives such as GB4FUN to help this shortfall of youngsters coming into the hobby. I feel that it is in the schools, youth clubs and scout groups that we have to inspire kids with the magic of radio.

Even after 50 years, radio still is magical for me. I just wish I could help to "spread the word" to today's young people. Also, industry NEEDS new radio engineers before the oldies die out!

V2000 vertical on 6m

Several recent local tests on 6m lead me to believe the V2000 triband vertical is not that good for local working. It is fine for DXing but signals around 15-25 miles away are weaker than I'd expect. Maybe the polarisation is not as truly vertical as I had believed? I can access the 6m repeater 25 miles away OK and can work stations, but at levels lower than I would have expected. Essentially the V2000 should be like a vertical halfwave on 50MHz, so this is a bit puzzling. In the past I had assumed it to be a pretty good antenna, but maybe not.

SixBox testing and "super" 6m DX

Back home in Cambridgeshire now and, sadly, was unable to find anyone within a 15-20 mile radius when in S.Devon with whom to test the SixBox QRP AM rig. This despite calling for several DAYS on the local 6m and 2m repeaters.

The Torbay 6m FM repeater was a good signal and I could access it well, but I heard not one person using it! No-one even replied to a call through it.

I had plenty of 6m DX QSOs on SSB using the magmount on the car and 5W though, and heard (but not worked) some remarkable transcontinental DX on the band from South America.

So, back to more modest aims, I shall be on the lookout for stations in East Cambs to do further range testing the SixBox. Let me know if you have 6m vertical and AM and are likely to be workable with 50mW AM from East Cambridgeshire so we can try a test. I am located in Burwell and have a reasonable takeoff to the west and north.