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For those interested in the word about Olivia - one of the best conversational digital modes on HF, perhaps the following blog entry would be useful. Please share around:


http://blog.nw7us.us/post/167737152217/come-join-the-fun-with-olivia-on-hf-shortwave


See you on the waterfall!


Tomas / NW7US

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Loving JTAlert :)
Just great for keeping an eye on who what where and I need that !
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Originally shared by ****

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Originally shared by ****
🌞

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Tomorrow morning we will be setting up our special event station, all are welcome to contact us.

The special event is the Mason Dixon 250th anniversary see this link for more info http://www.masondixonhistoricalpark.com/events.html?eventid=11

We will be starting at 8 am through 8 pm on Saturday, operating on 20 and 40 meters (conditions permitting), we will have two stations that should be manned by many operators in the time frame.

We will also be back up on Sunday, 10 am until 2 pm, again on both 20 and 40 meters.

We hope to work you, sorry for the late notice, but this event was touch and go for us due to so many uncontrollable variables.

Some of which was, late notice on no guylines due to kids running around, no vertical mounted antennas due to lack of guylines. Power issues, location on the site due to astronomers etc.

This is a once in a lifetime event for most of us, so we did what we could to get some antennas in the air for the event.
Mason-Dixon Historical Park - Events
Mason-Dixon Historical Park - Events
masondixonhistoricalpark.com

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MFJ-1799 Build and review.

So I decided to purchase this antenna a few months back, I have been slowly putting it together bit by bit when time allowed. Yesterday I raised the antenna in hopes the SWR would not be too shabby, boy was I wrong.

So a little about this antenna and the reason for something pre-made. The antenna is a 20ft 10 band antenna, bands are 2,6,10,12,15,17,60,40 and 80, or you could swap the 80 for 60 as there is enough room on the loading coil taps to do this. The reason for the pre-made is space, lack of tower and so on.

Build quality, while the quality of the actual antenna is pretty substantial, I was upset to find some parts missing, nothing major that I could not find at a hardware store, but this should not be the case. I also found between several loading sections of the mast was not working, due to someone in their infinite wisdom thought they could solder a terminal without cleaning off the varnish on the wound copper wire. I also found some pre-built sections with loose bolts causing intermittent connections and even found the plastic backing on the bridges between the loading coils. The coaxial connection had some black goo sealing the back of the connector, but was not sealed and would of allowed water to build up within, the connection midway of the mast, the cable exposed which would of allowed water to penetrate the cable and damage it.

So far, not a good review you may think, and you would be quite right in thinking as I am not quite finished.

This is a multiband antenna, it needs to be tuned on both ends of the antenna starting at the lowest frequency first, this requires a lot of up and down of the structure, something that is not easy to raise, something that is very cumbersome due to all the spokes on both end, see picture.

I do not have an analyzer, well at least not yet, I was going to attempt to tune with my SWR meter and my radio on low power, so I went in to just test the bands to see what my SWR is across the frequencies within the bands. I was shocked to see how far out they are, I have no idea where this antenna is tuned but it certainly is not tuned anywhere within the bands it is meant to be within.

Here is my readings thus far, I am getting an analyzer to see what is going on with this antenna, it has me scratching my head and an elmer buddy of mine that has been in broadcast radio for many years as an engineer scratching his head too. The reading so far are 80m low 12 hi 11, 40m low 10 hi 10, 30m low 8 hi 8, 20m low 7 hi 9, 17m low 4 high just less than 4, 15m low 6 hi 5, 12m low 5 high 5.5, 10m low 5.5 high 4, 6m low 8 high 6, 2m not concerned as I am not going to use it.

So with them values and not knowing where in the band or in this case out of band it is tuned for, I am not sure what to cut off or in some cases add to the spokes. What a mess, but with some perseverance I am sure I will get this tuned and working, just have to wait on the analyzer to come, then I can see where this antenna is resonant at.

So, if you are looking into getting something like this, don't do what I did, make sure you have an analyzer before spending almost $400 on an antenna, you know as well as I do, most of these are usually somewhat close to the bands they are meant to reside in, but this thing is so far out it is hard to see where it is resonating right now.

More to follow once this thing is tuned.
PhotoPhotoPhoto
9/24/17
3 Photos - View album

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Hurricane Irma Amateur Radio Emergency and Priority Traffic is Moving; Health & Welfare Traffic Queued For Later Delivery

09/08/2017
At this time, it is ARRL’s understanding that only Amateur Radio Emergency or Amateur Radio Priority traffic is moving in and out of areas affected by Hurricane Irma. Amateur Radio Health and Welfare communications are being queued up for later delivery into the affected area, as the emergency and priority traffic eases.

In the aftermath of a natural disaster, it is human nature for persons outside of the affected area to seek information on their loved ones. Those wishing to send Health and Welfare queries are encouraged to use the American Red Cross’s “Safe and Well” website to facilitate those contacts: https://safeandwell.communityos.org/cms/index.php
Safe & Well
Safe & Well
safeandwell.communityos.org
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