AmateurRadio.com

As you will recall, my antenna on 40m is very low and not that efficient: it is just a 10/20/40m Par end-fed with an average height above ground of 4-5m at most. Last night I was on 2W. I hate to think how low the ERP would have been on 40m!

Overnight 17 unique stations spotted me with best DX AE2EA (5654km). Even with a low and inefficient 40m antenna, WSPR still works well!

40m unique spots of my 2W WSPR last night

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

As a (now-retired) broadcast engineer, I grew to hate the LM-386.  It always seemed to me to be difficult to control and to be prone to oscillation.

My own solution was to switch to another chip for audio amps.  My own choice was the TDA2822.  It’s inexpensive and easily available from Mouser, Digikey and others.  It’s a dual amp, which is handy for stereo, but I use it in bridge mode even when I design mono amps.  My choice is the SOIC-8 package, which is large enough to be easy to use, but also saves pc board space over the DIP-8 that’s usually used on LM-386 chips.

My general tips are to carefully bypass the power supply for whatever chip you use.  I’ve often used 4.7 ohms or so in the supply line, and tried to bypass it close to the chip with an electrolytic, a .1 uF and a 20-100 pf chip capacitor.

But the MOST important tip for taming IC audio amps is to connect a small capacitor (I’ve usually used 33 pf chip caps) between the inverting and non-inverting inputs.  It tamed lots of otherwise-troublesome amps for me.

Andrew Ellis, NO6E, is a special contributor to AmateurRadio.com and writes from Oregon, USA. Contact him at [email protected].

I read about many homebrewers purchasing electronics from China on e-Bay. Many of these are major purchases such as test equipment, FM handhelds, antennas etc. The vast majority seem to be happy with their experience while some are clearly not.













I happily admit that in all cases, I have been very pleased with not only the quality of the items received but also in the service. With the high cost of shipping anything to Canada, I find the 'free shipping' for all of these items to be particularly attractive.

Although all of these items are available from many e-Bay sellers in China, I think it pays to carefully search feedback records before purchasing. In many cases, a high rating does not always tell the story. I look for high volume dealers that have very few complaints within the past year. Check what complaints are being made...if it is the quality of what is being sold, then go elsewhere, as some dealers do a high volume of selling junk while others have only single-digit or even zero negative feedback.

It will still be some time, if ever, before I feel comfortable buying any high priced items from China but if you were brought up in the 50's, you will probably recall when buying from Japan was an invitation for disaster and look how that turned out!


Steve McDonald, VE7SL, is a regular contributor to AmateurRadio.com and writes from British Columbia, Canada. Contact him at [email protected].

73 to AD7MI and welcome to NI0L…

…. and a no frills QSL card.

My retirement from the Army is both official and complete as of May 1st. The XYL and I have decided the land of &#216 is where we are putting down our roots. Therefore it was high time that my callsign reflect my geographic location.

Scott Hedberg, NØZB, is a regular contributor to AmateurRadio.com and writes from Kansas, USA. Contact him at [email protected].

Several weeks ago, I worked KF7YRL in the state of Montana. One of the great things about ham radio is learning about the people and places they live in the world. I love this aspect of the hobby. It’s absolutely amazing to me that folks, over a thousand miles away, can communicate in “real time” with simple “dots and dashes”. Often times I wonder what life was like before the modern conveniences we’ve learned to take for granted in the complex world of today.

While talking to Steve, it became apparent that, like myself, he was a guitar player. Much of the conversation revolved around acoustic music. He uses an “Aspen” guitar. I use an Italian made “EKO” guitar which I bought in Naples Italy in 1970.

Guitars are “special” things which “fit” the hands of different people in unusual ways. Over the years, I’ve discovered there isn’t a “right” guitar for every musician. Every guitar has a different “neck” and this part of the instrument is “critical” to every player and every guitar plays differently. We’re both happy with our choice of guitars. That’s part of the joy of music….the universal language.

Steve lives on a ranch in Montana (Sonntag Ranch and Wildlife Preserve) and is an “emergency physician” on a “Cheyenne Indian Reservation” in that state. He lives in a town which is named after the Miniconjou Lakota Chief “Lame Deer” who was killed  by the United States Army in 1877, by the way, under a flag of truce just South of this town.

Not too long ago, I had the privilege of seeing the “northern” part of Montana and experiencing the rolling prairies which seem to extend forever, rolling along endlessly in a sea of golden grass. It’s breathtakingly beautiful in the summer months but brutally harsh in the winter time.

The Native Americans have always inspired me due to their relationship and respect for nature. Being active in the Boy Scouts during the days when I worked on heavy equipment in the coal fields here in West Virginia, the American Indians (slang) were looked upon with great respect for their skills in outdoor living. I also hold that value and respect for “true” Native Americans.

Lets face it folks, the American Indians were here long before us, and they used the land a lot more wisely than we do now. It’s becoming more and more difficult each day to find a “quite” place where the relationship with the earth, it’s wildlife, and it’s people are viewed as harmonious and not a commodity.

I chuckle every time I hear complaints about immigration in America these days– all those complaining about being invaded by foreigners, free-loading, and being just plain “Un – American”. Yes…. it is laughable and probable to use much harsher words.

I think living independently and “off the grid” is an admirable characteristic. Although I’m too old now for traveling long distances by foot, horseback, or even bicycle; in past years I’ve actually “lived’ out of a backpack, or the panniers carried on a bicycle, and I loved every minute of it.

Society at large should experience this humbling experience. It makes a person realize the really important things in life; like food, shelter, and clothing. The rest of life is what you make it and I’ve found that keeping life as simple as possible is a good way to live life.

QRP radio, in many ways, has these qualities. A simple radio, with a simple battery, with a simple wire in the trees for an antenna, sitting under the stars, around a campfire, with a set of earphones, so as not to disturb the neighbors.

I look forward to more conversations with Steve (KF7YRL) in the future. He provides an extremely valuable service to this part of Montana. I can visualize this part of the country easily and I like what I see.

John Smithson, Jr., N8ZYA, is a regular contributor to AmateurRadio.com and writes from West Virginia, USA. Contact him at [email protected].

Just had an email with this at the end:

“Sent from the ISS …-.-“

I am assuming this came from the International Space Station (ISS).

If correct, this is a first for me.

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

I am always nervous about lightning strikes.

The excellent Southgate News today told the (true) story of a local CBer who had his vertical and CB rig destroyed by lightning. See http://www.huntspost.co.uk/news/latest-news/
huntingdon_cb_radio_user_almost_electrocuted_after_lightning_
bolt_strikes_aerial_1_3648368http://www.huntspost.co.uk/news/latest-news/
huntingdon_cb_radio_user_almost_electrocuted_after_lightning_
bolt_strikes_aerial_1_3648368

I usually disconnect antennas when there is lightning about but I am still nervous.  One of my friends (not a radio ham and with no big antennas in the air) who lived in a normal estate home had his home struck years ago and it took out lots of his household wiring. The chances of a direct hit are rare, but I am always bothered and never quite sure what the best advice is.

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