AmateurRadio.com

Courtesy: http://www.picgifs.com

With the return of cooler weather and a few overnight rainy periods, the brown summer-lawn has suddenly turned green and is growing far too fast once again. I find this time of the year, as well as early spring, the best time to plant any new radials that I like to continuously add to my vertical antenna systems. My large inverted 'L' for 2200/630m as well as my half-slopers for 160, 80 and 40m, all have a common base, which lets all of the antennas benefit from the radials laying just beneath the lawn.


The procedure I follow is fairly easy but does take time and I usually just add four or five each year. Although I haven't kept an accurate count, I know the system now has fifty or more radials varying from 30' to 70',  fanning out in various directions from the base of my main tower.


The terminated end of the radial is first pinned-down using a U nail or a longer 3 1/2" galvanized finishing nail that has been bent over in the vise, with the height of the grass determining which one I use. Shorter grass lets you get away with the smaller U nails, which can be found in most building supply stores.


Once pinned, the grass is parted using a stick, knife or awl, to produce a shallow gap for the radial to sit in. I try and do a 3-foot section at a time before placing the wire into the opened-up area. Another way that is effective, especially if the grass is short and the soil dry, is to run the blade of a knife through the grass to actually slice a shallow slit which the wire can be pushed into. This allows the wire to be almost completely buried immediately. Both methods require pinning, with the nails, every few feet.

Once pinned in place, the grass can be quickly ruffled back into place, covering the radial. When done in the fall or in the spring, the grass will very quickly completely overgrow and incorporate the radial into the lawn, never to be seen again.


An interesting product that I have recently learned of may also be of interest - "Ground Staple Pins" by RossRadio. Details may be viewed at their website.

Courtesy: http://www.rossradio.net

It really is very little work for the immediate payback realized by lowering system ground losses and increasing your antenna efficiency and overall ERP, especially on LF.

With the winter DX season just around the corner and the pleasant fall weather, it couldn't be a better time to plant a new crop of radials in the backyard!


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

Ten-Tec Factory Relocation Update

Internet access is working, working on phones, carts, shelves, desks, etc. We are far from having enough set up to do any real work at the new location yet, but, the move is occurring, boxes are getting moved, and unpacked. Phones will transition from one service provider to another so that will be a mess for a short spell when the porting occurs, but by end of October, we “should” be business as usual, no, not “as usual”, better. We are still making rigs and will continue to do throughout the move, so, Eagles will still leave the nest throughout the rest of this month, so will Argonaut VIs and so will OMNI-VIIs.

Thanks, and 73,
John Henry, KI4JPL
TEN-TEC Engineering, a Division of RFConcepts LLC

It appears that the special transceiver pricing continues to hold. That Eagle package at $1499 is an amazing price.

Filed under: Ham Radio Tagged: tentec

Jeff Davis, KE9V, is a regular contributor to AmateurRadio.com and writes from Indiana, USA.

As an experiment this afternoon and evening I am using the (short baseline) earth-electrode antenna. I am being copied by G0LRD (25km) and G3ZJO (79km) so far. It is now 1620z. Initial results suggest G0LRD is getting me very slightly better on the earth electrodes, whereas G3ZJO is getting me slightly weaker. This is comparing the earth-electrode “antenna” with the HF /VHF antennas with strapped feeders tuned against mains earth. In the latter case I resonate the antenna with a 110mm diameter coil with many taps.

One end of the earth-electrode is tied to mains earth. The “far” earth is a 1m long earth rod driven into the soil. The connection to the far electrode is 32 x 0.16mm PVC covered wire running along the fence at a height of about 2m. This wire dog-legs and is about 15m long. The spacing between the “far” electrode and mains ground in the shack is about 12m max. At the old QTH the baseline was more like 20m.

I think the earth-electrode antenna acts a bit like a loop so best results tend to be in the line of the loop. It also means there is not a huge difference between the two systems. You could say they are both equally bad, but the earth-electrode system needs no matching coil. I have optimised the resistive match using a 3C90 toroid (step up) between the transverter and earth-electrode antenna. At the old QTH it looked close to 50 ohms so the toroid was not needed.

When fitter, I’d like to try an earth-electrode system with a much bigger baseline.

There is no doubt that my 472kHz antennas can be much improved. The question is, “how seriously do I want to try?”

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

This looks like a design by Michael Rainey AA1TJ, but this one was on a German blog site of Peter DL3PB. I was very annoyed by the Facebook pop-up that kept appearing. I kept closing the pop-up but it is really annoying. Website owner – PLEASE get rid of it!

See http://streampowers.blogspot.co.uk/2013/08/para-saki-qrp-transceiver-fact-diodes.html .

The design makes extensive use of tunnel diodes, a Michael Rainey favourite.

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

The man behind the Linear Amp Peter Rodmell G3ZRS founder of Linear Amp UK  has published a book.

• Everything you need to know about Valve Amplifiers
• History of Valves
• Classic Valve Amplifiers
• Fault finding
• How to make amplifiers for HF and VHF
• ATU's and Tuners

 http://www.thedxshop.com/books/amplifiers-by-peter-rodmell-g3zrs.html

I have also seen it being sold on ebay too.

Update (16.10.14) RSGB have stock:  http://www.rsgbshop.org/cgi-bin/sh000088.pl?WD=amplifiers&PN=Online_Catalogue_Technical_6.html#a1443
Steve, G1KQH, is a regular contributor to AmateurRadio.com and writes from England. Contact him at [email protected].

If you have joined this Blog site in the last few days, please note I have unlinked it from my Google+ account, so please join again via the Followers link  top right of this msg

If your new to reading this Blog, again please use the Followers link, it would be appreciated to know who is reading it..

Thanks!

73

G1KQH



Steve, G1KQH, is a regular contributor to AmateurRadio.com and writes from England. Contact him at [email protected].

I wrote, produced, and recorded Cornbread Road, a ham radio mystery series in 2010 when it was released one episode per week for thirteen weeks. After a successful run, I removed the files from the server as I never intended it to be continuously available.

But ever since then I have made the thirteen audio files available once a year for a limited run — for those who might have missed it. The audio series is available again right now, but only until the end of the month. On Halloween I’ll pull down the files until next year. Download them now or wait until next year.

It’s all fun, fiction and unlike any ham radio story you’ve ever heard told.

Filed under: Ham Radio Tagged: audio

Jeff Davis, KE9V, is a regular contributor to AmateurRadio.com and writes from Indiana, USA.