St. Louis Vertical Part 3, Conclusion

This is part three, the conclusion of the construction of the St. Louis vertical.

I terminated each end of the twin lead by melting a small hole in between each conductor, large enough to fit a zip tie through and pulled in nice and tight. Then I stripped off insulation from each conductor and soldered them together – did this at each end of the twin lead coil. The bottom shorted conductor is kept bare and I use a good quality alligator clip to attach my coax center conductor. The orange wire is attached to a 17 1/2 foot counterpoise as seen below.

Here you can see the bright orange stake that I use in the field, along with the bright orange counterpoise so nobody trips over any of this stuff while operating portable.

Using alligator clips allows the use of multiple sized counterpoises to increase the efficiency of the St. Louis vertical while in use.

I carry a second stake with a 40 foot counterpoise. In this configuration the antenna resonates around 6.5Mhz. In a future version of this antenna I’ll add fewer turns of twin lead so it resonates close to 20 meters. I use an LDG tuner, the QRP Z11 along with my FT-817 and the tuner handles this antenna quite nicely.

The photo above shows the upper terminated connection with a male/female connector to attach the radiating element that extends to the tip of the Wonderpole. It provides an easy disconnect point for the radiating element.

 

These male/female connectors are available at most hardware stores that carry electrical supplies. I use heat shrink tubing to give all the connections a professional look and I think it extends the life of the antenna components. It doesn’t take long to add that extra finishing touch.

 

 

 

 

The antenna is staked on a ground spike used for beach umbrellas. It is a discontinued item that was available at Lee Valley Tools here in Ottawa. I attach a one inch wooden dowel about 3 – 4 feet long and to that I attach the St. Louis Vertical with large plastic zip ties. At the end of my session I just snip the zip ties off. The zip ties get the Wonderpole nice and snug against the non-reactive wooden dowel and if need be I can hammer some of the extra length of the wooden dowel into the ground for greater stability during windy conditions. I sharpened the end of the dowel for ease of insertion.

 

 

 

Here’s the St. Louis Vertical fully extended at the edge of my patio. This antenna is a great portable addition to operating in the field and it sets up in less than five minutes. My first contact was on 15 meters using 2 watts on PSK31 to a station in Slovenia with a 599 signal report.

Please let me know if you have any questions of the construction details.

We Have Met The Enemy, And He Is Us

The first step is admitting you have a problem and then asking for help. Nothing wrong with this approach. The Radio Amateurs of Canada, Canada’s national amateur radio organization is in dire need of help. The organization wants change and it identifies itself as having ‘dinosaur disease’ as one fundamental problem amongst many.

Peter VE3HG, VP of Public Relations at RAC, has a plea on the RAC blog for members and non-members alike to look at 7 documents for ideas on transforming Radio Amateurs of Canada. Download them to read and please send your comments to Peter in the comments section of the RAC blog or write Peter directly at his RAC email address - ve3hg @ rac.ca . (remove the spaces)

Is RAC worth saving? Let’s hear from you, hams and non-hams alike. Tell it like it is.

About this entry’s heading – Earth Day 1971

Great Weekend With DX

Weather in the Ottawa area was superb this weekend. BBQs and relaxing outside were the order of the day. Temperatures moderated to the mid-20s (Celsius) on Sunday. This necessitated some outdoor relaxation and a good book.

After dinner I started listening around 17 meters. There were a few signals but not a lot of DX. A few minutes later I saw the S-meter on the FT-950 hitting S9. A digital station was very loud; and there was a pile-up starting on frequency. It was 2330Z and usually at that time of day the band is closed. With little solar activity I was surprised by the strong signals on 17 meters.

The station was Ramon PZ5RA in Suriname. I had worked Ramon in 2004 and again in 2007 on digital modes, using my FT-100 in those days. I finally worked Ramon after 30 minutes using BPSK125 – makes a QSO whip along quickly. I kicked in about 12dB of attenuation because he was so strong on my Cushcraft R6000. About 10 minutes after the QSO the band dropped out – silence – not a signal. I suspect Ramon will be hanging around 17 meters since the band was in good shape for north/south propagation. Maybe we’ll get a repeat tonight and more stations will be able to work Ramon in Suriname.

Late Night DX On 20 Meters

It’s out there. Last night saw me re-connect with Bill, ZL3NB in Christchurch New Zealand at 0437Z. His signal was 599 and his report to me was the same. There was some QSB but armchair copy using Ham Radio Deluxe and PSK31. My output was set to 25 watts and again this was using my Cushcraft R6000. That’s a distance of 8835 Kms or 14218 miles. Not bad for a low power digital QSO.

I had originally worked Bill in April of 2004 and I happened to be one of his first digital contacts at around the same time at 0358Z six years ago. It was nice re-connecting with Bill. He worked a couple of more stations after my QSO and then called CQ for a long time. It was time for bed knowing there was lots of DX floating around despite the low sunspot numbers.

Bill’s ham shack in New Zealand. The main equipment consists of a Kenwood TS2000 and TS530S (Classic setup with the VFO240 and SP230) along with a Ameritron Amp. Antennas consist of a Mosley TA33 tribander and inverted vee's for 80/40 and 30 meters.

I suspect there’s more DX at that time of the morning, rolling in from the South Pacific area – I just ran out of steam and had to pull the plug.

The steamy heat wave enveloping Ottawa finally broke early this afternoon with some rainshowers and thunderstorms. Temperatures plummeted to +23C and power went out for a few short seconds. It’s time to leave antennas disconnected and grounded before these intense summer storms move into the area. It’s good practice and could save you a bundle if there’s ever a lightning strike close by.

For more info on Christchurch go to: www.christchurch.org.nz