Archive for the ‘qrp’ Category

KX3 troubles


A happy looking KX3
I decided to take the KX3 out and about on my day off Friday, it was an overcast day so I thought it wise to do my operating from the mobile rather than taking the bike. I set up the mobile whip antenna on my car and situated myself in the passenger seat and was ready to go.(note….this time before the trip out I made a list of things to bring so I was not without important items as happened in the past)  Brought the KX3 up to the 20m QRP watering hole (14.060) and just wanted to check the SWR on the radio before sending out my 5 watts of raw power. The KX3 gave me an error message but it seemed I was still able to transmit and I did for a short time. Then I noticed as I moved up and down the band my
Not so happy KX3
SWR stayed the same at 1.4:1 no matter where I was on the band….even up into the SSB portion. It was then determined something was wrong and I had a fast look at the antenna and coax but all seemed ok. I then switched to my 15m whip antenna and the error message was gone but I still had this strange low SWR across the 15m band as well. So it was time to pack things up and head home. Once at home I put the KX3 on a dummy load and tried it out and all was just the way it should be. I then put the rig on the MFJ 1788 loop and again no problems. So I suspect it's the mobile setup and I did post the problem on the Elecraft reflector and was given advice to check the mobile setup. When at home I did want to give the KX3 the full workout and to do so I started to call CQ on 20m. Terry WA0ITP came back to me from Iowa and our signals were in around 339 and conditions wee not that great but we were able to carry on a decent QSO. So the KX3 is working good but it's just another "project" I have on the burner that has to be worked out.  No time today as I am on call  this week and the phone has not stopped ringing with calls for me to go in!

QRP 1,000 Miles per Watt….from the Campground

KX3 bathed in light from my red headlamp

The kids are starting back to school this week, so we thought we would get in one more family outing before life gets crazy.  So last week we went camping from Wednesday morning until Saturday morning.  Its great to be at the campground during the week – almost nobody else is there!

It rained every night – the days were hot and humid.  We spent most afternoons out on the lake in my Dads boat he loaned to use – nice and cool with lots of swimming and tubing.

Friday night I had time to play radio!  I setup the KX3 running on internal batteries on the picnic table.  Hooked up the portable QRP antenna that I lashed up to the canopy and I was off to the races.

I used my headlamp with a red light to see what I was writing and the radio controls.  This worked exceptionally well – and kept the bugs away.  I have used the white light before and it really draws in the bugs!

When I turned the rig on it was on 20 meters – I expected it to be dead since it was about 03:45 UTC (10:45 PM local) – but I immediately heard signals.  As I tuned around, I was hearing DX everywhere!

I listened to some of the exchanges, and could tell it was a contest – RST and Serial was the exchange.  Turns out it was the Worked All Europe HF Contest.

So I dove into the mix and started pouncing!  Wow it was fun….

UA7K – Russia (I think, could not find in QRZ)
UW2M – Ukraine (1,172 miles per watt)
UT0U – Ukraine (1, 134 miles per watt)
AI6O – California
K1XM – Massachusetts
UY5ZZ – Ukraine (1,115 miles per watt)
RW1A – Russia (1,091 miles per watt)
RM5D – Russia (1,091 miles per watt)
YP9W – Romania (1,139 miles per watt)
HA8VV – Germany (1,055 miles per watt)
S57DX – Slovenia (1,054 miles per watt)
HG7T – Hungary (1,091 miles per watt)
HG8R – Hungary (1,115 miles per watt)
DJ5MW – Germany (1,004 miles per watt)
SN6A – Poland (1,019 miles per watt)

I finally shut it down at 05:21 (12:21 AM local time) – but the band was still hoping.  I did tune around 40 meters and heard some signals, but the antenna just needs to be longer for good 40 meter operation.

What a blast!  Almost everyone came back to me on the first call – only 3 times did I have to repeat my call.  Everyone I called, I worked!

It was fascinating to think about working Russia and Ukraine with all the tensions in that part of the world right now – guys are still having fun playing with the radio.

I am really enjoying dipping my toe into these contests – it is a great way to work a bunch of stations – and some DX to boot.

Nick KE0ATH working 2 meters

Nick (KE0ATH) also did some operating on 2 meters using a collapsible portable J-pole that we built together.  He had a blast.  He is working on putting together a go-box 2 meter station for camping and outdoor adventures.

Be sure and check out, and subscribe to my YouTube channel – I am working on several more videos – stay tuned!

QRP Works – QRO Works Better

For more than a decade, beginning in 1996, I adopted the QRP lifestyle and had more fun building kits, learning about antennas, making friends and filling the log than I had during any other period of my many decades in the hobby. Granted, my goals during that period were modest, but I’ve never had much problem making contacts using QRP and CW with wire antennas.

Count me as a believer in the magic of QRP. But while contacts can be made using QRP, that doesn’t mean it’s always easy for the guy on the other end of the link, who may struggle mightily just so I could put him in the log and publicly proclaim, “QRP Works!” Low-power enthusiasts should always acknowledge that any success is not so much theirs as it is the guy on the other end of the contact.

Beyond that, admitting that there are benefits to be derived from generating a potent signal is important because they are many. You don’t read much about that in the posts of QRP blogs. Most seem to take great pleasure in pointing out that “QRP works” without mentioning the obvious — if low power CW works then high power CW works too.

alpha

This last weekend, John Shannon, K3WWP, a devoted QRP and CW enthusiast and co-founder of the North American QRP CW Club (NAQCC) surpassed the 20 year point in a continuing “streak” of days (7,305) making at least one CW contact. Using low-power and simple wire antennas. From a less than desirable HF radio location. It’s an impressive show of perseverance and tenacity that he says was done to show that QRP CW works. He wrote:

“This is dedicated to all those who say things like ‘You need high power, big antennas, and a great location to be able to make ham radio contacts’, or ‘Life is too short for QRP’, or ‘CW is dead’ and other such remarks denigrating QRP/CW.”

But I would suggest that there are fewer operators who claim “QRP doesn’t work”, than there are QRP enthusiasts willing to concede that finding a potent signal that pops out of the noise floor is one of the great joys of abiding in the shortwaves.

The “right tool for the right job” is an eternal wisdom. It’s always been good advice. “If all you have is a hammer, every problem begins to look like a nail” is another nugget of wisdom. Putting them together and stretching them to fit, I came up with a corollary:

If all you want to use is QRP, you’ll spend your life preaching how well it works.

Common sense, and physics, support the notion that if a five watt CW signal can be copied, a 1,000 watt signal will be easier to copy despite the vagaries of propagation, QRN, and QRM — though you won’t find that truism bandied about much.

QRP Works – QRO Works Better.

I’m going to have that tee-shirt made. Who wants one?

Filed under: Ham Radio Tagged: cw, qro, qrp

Replacement rechargeable battery for Elecraft KX3

Tracer Battery kit
In a recent post I told the blog world about the failure of my KX3 portable power source. It was an external battery that was ordered from China. The battery  lasted under a year until it just failed to take a charge. The battery was only used maybe 6 times.  Not sure what failed but a fellow blogger  Larry W2LJ with the same battery had a similar failure as well.  It was time to get on the net and look for another external, compact and reliable battery. Plan number one was to avoid the products from China as I have learned a hard lesson there! Reading blogs of op's who operate portable and use an external power source (when the internal batteries give up the ghost) I came across a company called Tracer operating out of the U.S. To make a long story short I ordered from them and below are the spec's on the Lithium Polymer battery.
Closer look at the battery
- 12 volt  8Ah, weight is 600 grams (19.4 oz), charge time is 8-12 hours and carry case.
- Come with it's own wall charger and car adapter charger.  
- An LED battery charge status indicator. 
- A flate discharge curve. 
- Zero self discharge. 
- A tough ABS case
Status indicator light

Some operating time in the park.

The setup in the car
It was a great day today even though they called for rain  it was just overcast and very nice cool temps in around 17C. I was off work today and after I had completed the chores around the house it was time to get out in the outdoors for some ham radio. Since there was a chance of rain I decided to not set up outside and get rained out but instead I took my car and set up the Elecraft KX3 mobile from one of our near by parks on lake Ontario. I set out on my way and checked and double check all my items (last weekend I forgot   a coax connector and the portable op's came to a fast end) I arrived at the park around 13:00 local time and began to call CQ 20m I had no takers and decided to spin the dial to see who I could find. I did come across some DX stations calling CQ but was not able to be heard and some had very long waiting lists wanting to contact them. I then came across Bernie KB4JB from Florida and we had a very nice 20 minute QSO. The CW speed was in around 14 WPM and both of us were able to share station, location and other information before conditions changed and we both faded out. The KX3
20m mobile whip 
operated just fine for over an hour and a half on the internal batteries at 5 watts output. At one point during my QSO with Bernie for some reason my KX3 key was just not sending what I wanted. As time passed in our QSO I noticed my headphone cord was under the KX3 Key and causing the troubles. Once that was dealt with the code improved minus the headphone cord! I only made one QSO for the outing but it was a long one and the speed was at a very comfortable.  The antenna was a mono band 20m whip, the power was 5 watts from the internal rechargeable batteries and the radio as was mentioned the Elecraft KX3. It was time to head home and get dinner going for Julie's home coming from work.

Random Antenna Musings and Power Line Noise

As I have shared in the past I have a 66′ dipole in the attic fed with ladder line.  I live in a HOA controlled neighborhood so my antenna options are pretty limited.

Last night I set WSPR up running 2 watts on 20 meters.  Started about 2200 UTC.  Wow it really seemed open.  My 2 watts was spotted multiple times into Europe, Alaska and all over the USA.  This antenna does not have a problem getting out.

The problem with my antenna setup is on receive.  I have minimum S5 noise on 40 and 30 meters.  Typically S7 on 20 meters.  Interestingly enough 15 is quieter and 10 meters is typically S2 or so.  The noise is static with some noticeable “crackling”.

Last night on WSPR was a great example.  I was getting heard ALL over, but I was only decoding about 2 or 3 stations – all in the USA.  Also on PSK31 or JT-65 I see guys working DX that I can’t even here or see on the waterfall – my noise level is just too high.

Sometime soon I am going to cut all the power to my QTH and see what the noise level is.  If significantly reduced, I will see what I identify as noise sources in my QTH.

Beyond that, less than a 1/4 mile as the crow flies I have identified some very noisy power lines.  They are so noisy that it they will completely blank the AM radio in your car when you drive past them.

Here is a picture of where my house sits in relation to the power lines (my dipole runs parallel to the power lines):

Blue marker is my QTH – Red line is power line (X’s are noisy poles)

I will be contacting the utility company at some point, but first I want to see how much of the noise is coming from my own QTH.

I think the other problem with my poor receive performance is that fact that the antenna is in the attic.  I have been thinking about some solutions to get some wire outside the house to see if that can help.
I have to be very stealth, for both the happiness of the XYL and the HOA 🙂
I was thinking about setting up a long wire using the 9:1 UNUN that I use for my Portable QRP Antenna – only using trees and setting it up as an inverted L.
You can see in the picture below, I have 2 trees that are taller than my house.  The tree on the left, which is the front of the house will hold the vertical portion of the wire, and then it will run horizontal to the tree on the right, which is in the back of the house.  
Red markers are trees – red line would be horizontal leg of inverted L
I am thinking if I use like a 22 or 24 gauge grey wire it should be almost invisible.  The horizontal leg will be about 25′ fee in the air.  All told I should be able to get about 70-80 feet of wire for the inverted L.
I will probably wait until the leaves drop this fall to make it easier to fish the wires through the trees.  I just wonder how much of a difference getting wire in the clear will make to my receive quality and noise issues.
I guess that’s enough rambling for today.  If you have any thoughts I would be happy to hear them!

Shut down two days in a row!

A foggy view of Toronto from my setup
This weekend I planned on getting some radio time in Julie was going to see a friend who lives out of town on Saturday so I thought I would get out and get hamming. We live right on Lake Ontario and within a short walk and or bike ride there are some great locations on the lake to do some portable op's. On Friday night I charged up the KX3, set out all of the needed items for outdoor ops. Saturday came and off I went, I decided to walk and it turned out to be a longer walk then I thought. I arrived at my
Trail on the way there. 
spot and setup the KX3 along with my Alexloop. Just as I sat down to get some operating time in it started to rain! With no rain gear and about a 1/2 hour to walk back I packed things up and headed back. Well I tried it again on Sunday and this time I took my bike and some rain gear just in case. This time I set everything up and was ready to go until I tried to connect the Alexloop to the KX3…..it seems for some reason I removed the adapter that allowed me to go from PL 259 to BNC at home! There was no way to hook up my antenna to the KX3 radio so I decided the radio god's were just not smiling on my this weekend and I headed back home the long way to tour around the lake.  Lesson learned I now plan to make up a small 3x5 card with all that is needed for the trip.
Small river on my way home. 
One of the many beaches 

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  • Matt W1MST, Managing Editor