AmateurRadio.com

Steve G1KQH (font, or is it fount (?) of all knowledge) sent me this link of the homebrew 7MHz SSB transceiver by VK3YE:

New Homebrew 7MHz QRP rig from VK3YE

https://www.youtube.com/watch?v=JMSL5KH42m4&feature=em-subs_digest

Roger Lapthorn, G3XBM, is a regular contributor to AmateurRadio.com and writes from Cambridge, England.

UPDATE ON BILL PASTERNAK WA6ITF: Don Wilbanks AE5DW and I had a conference call with Bill Sunday evening (6/7/15). The good news is: Bill is not in the ICU; the bad news is he is in serious condition after being diagnosed with--as he termed it--”a broken back.” I take this to mean he has fractured at least one vertebrae. He is being treated for the pain associated with such an injury, and thus is not able to write (type), nor can he read for very long. He said it is also impossible for him to receive very many phone calls, so they must be kept to a minimum. Bill stated that for the immediate days ahead, his focus needs to be on the healing process, and improving his health, so that’s where his focus will be. He asked us to pass along his appreciation for all of the thoughts and prayers that have been sent out on his behalf. He also asserted that the Young Ham of the Year Award for 2015 will be awarded this year, with the recipient to be announced very soon. The YHOTY award ceremony takes place at the Huntsville (Alabama) Hamfest in mid-August.

Here is this week’s space weather and geophysical report, issued 2015 Jun 08 0221 UTC.

Highlights of Solar and Geomagnetic Activity 01 – 07 June 2015

Solar activity was low this period. Low to mid-level C-class flare activity dominated the period and Region 2361 (N16, L=105, class/area=Dai/110 on 06 Jun) was responsible for the bulk of the activity. Region 2361 produced a total of nine C-class flares throughout the week, the largest of which was C8/Sf flare at 0947 UTC on 04 Jun. Region 2360 (N15, L=132, class/area=Eac/140 on 07 Jun) grew in total sunspot count, area, and magnetic complexity late in the week but was only responsible for three low-level C-class flares this period. In addition to the low-level solar activity, multiple disappearing solar filaments and eruptive prominence liftoffs were observed throughout the week, but none resulted in Earth-directed coronal mass ejections.

No proton events were observed at geosynchronous orbit.

The greater than 2 MeV electron flux at geosynchronous orbit was at normal levels throughout the period.

Geomagnetic field activity was at quiet levels throughout the period under an ambient solar wind environment with unsettled levels observed early on 01 Jun and late on 07 Jun which were attributed to minor perturbations in the solar wind.

Forecast of Solar and Geomagnetic Activity 08 June – 04 July 2015

Solar activity is expected to be at low levels with a slight chance for M-class (R1-Minor) flare activity for 08-16 Jun due to the flare potential from Regions 2360 (N15, L=132), 2361 (N16, L=105), and 2362 (N07, L=100). As Regions 2360, 2361, and 2362 rotate off the visible disk, very low levels of solar activity are expected with a chance for C-class flare activity for 17 Jun-04 Jul.

No proton events are expected at geosynchronous orbit.

The greater than 2 MeV electron flux at geosynchronous orbit is anticipated to reach high levels on 10-14 Jun with moderate levels likely on 15-19 Jun in response to an enhanced solar wind environment caused by the influence of coronal hole high speed streams (CH HSSs). Normal levels are expected for the remainder of the period.

Geomagnetic field activity is expected to reach active levels on 08, 10 Jun with G1 (Minor) geomagnetic storm conditions anticipated on 09 Jun in response to a recurrent negative polarity CH HSS. Unsettled geomagnetic field conditions are expected on 11-12 Jun as CH HSS effects subside. A recurrent positive polarity CH HSS is expected to bring about isolated periods of unsettled conditions on 15 Jun. Generally quiet field conditions are expected for 16 Jun-03 Jul with unsettled levels likely again on 04 Jul due to a solar sector boundary crossing ahead of a negative polarity CH HSS.

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Live Aurora mapping is at http://aurora.sunspotwatch.com/

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courtesy: googlemaps.ca

My recent blog discussing the 49m Canadian stations, discussed the need for a better picture of the CKZU (6160kHz) antenna system. Located on the mudflats of far western Richmond (Steveston) and a stone's throw from the Pacific Ocean's Georgia Strait, CKZU's  gets out very well for its compartively small 500W transmitter.


On a weekend bike ride along the West Richmond dyke, Mark (VA7MM) snapped this wonderful close-up view of the system:

courtesy: VA7MM

It appears to confirm the rumor that the antenna system consists of a two-wire beam (using wide-spaced folded dipole style elements) ... one element being driven and the other element being a reflector. According to Mark, the orientation would beam the relayed CBU-690 signal up the coast of British Columbia and not towards the SE as the original Google photo appears to indicate. It is certainly a well 'overbuilt' structure. No doubt its height contributes to its ability to radiate a good signal all around North America (and Europe).

So the next time you are tuning around 40m, drop down a bit and see how their signal sounds at your location ... you may be pleasantly surprised.
Steve McDonald, VE7SL, is a regular contributor to AmateurRadio.com and writes from British Columbia, Canada. Contact him at [email protected].

I do not do much operating in my radio room in the house, most of my operations are done portable. But for some time now I have been plagued with some major noise to my rigs, the noise is about S9 or more at times and varies on certain frequencies and sometimes with odd sounds.

Not too long ago I had rebuilt my 24v battery pack for my PRC-104 with NiMh batteries, what I had found when the charger was working was the noise was atrocious, once battery was charged the noise would subside but I guess it was never totally gone. So one day when all of our power was down for a tree on the line I tested the radios with battery and found zero noise levels, none what so ever, so it lead me to start searching a bit deeper, looking at TV noise, routers etc, but still no luck nailing the problem.

So I continued to do a bit of more pulling of plugs and seeing what and where the noise could be coming from. I own many types of battery packs and chargers, batteries for radios, cameras and scanners, so I had to start one at a time. I leave the chargers always plugged in ready to go, so never really anticipated that this would be my issue. But I was very surprised when I found two of my chargers that were the problem.

The one charger was indeed my smart charger for my NiMh battery pack for my PRC-104.

 

The other charger that turned out to be an issue was a Duracell battery charger that I use for my camera batteries. It was amazing at how quiet things got once they were unplugged. The noise on my VX-1700 with these chargers plugged in and not being used would be a solid 9 and more, once I unplugged both of these units the noise dropped to a 3 and I could hear stations once again. I need to look at some of the other chargers in the house that are used for routers and other items in the house.

The NiMH charger when charging makes all bands useless when it is actually charging, the charger for my VX-1210 is the same, very loud noise levels emitted from these units.

So I am glad I did a bit of unplugging and checking and have found some of the issues that have plagued the home shack. Many of today’s electronics is just plain noisy and does emit all kinds of stray RF and noise.

Fred Lesnick, VE3FAL, is a regular contributor to AmateurRadio.com and writes from Thunder Bay Ontario, Canada. Contact him at [email protected].

Some years ago (in my fit days) I build a simple DSB WSPR rig for 10m based around a low cost 14.060MHz crystal bought from the GQRP club.  The idea was to pull and double this crystal and use it in a simple DSB TX and direct conversion RX.  Both TX and RX have been built separately, but I was ill before I got around to combining the 2 into a 10m WSPR transceiver. Both parts worked well.

See https://sites.google.com/site/g3xbmqrp3/hf/wispytx .

Roger Lapthorn, G3XBM, is a regular contributor to AmateurRadio.com and writes from Cambridge, England.

One of the best rigs I once owned was the 10W Icom IC703. This was a well equipped QRP radio with a decent receiver, DSP and auto ATU. I sold it to a local amateur who was a poor pensioner but I regret selling it now! No fan needed at 10W.  Just a first class rig.

See https://sites.google.com/site/g3xbmqrp3/hf/ic703 .

Roger Lapthorn, G3XBM, is a regular contributor to AmateurRadio.com and writes from Cambridge, England.