Posts Tagged ‘Antenna projects’

Limited space, antenna restrictions and HOA’s….there is hope!!

Not to shabby
There are hams out there that I pass by them now and then on my travels who have the luxury and availability to erect amazing towers with some amazing antennas on them. It would be great to have the land and be in the country and have "eye candy" towers and antennas. Then there are some with small city lots but do amazing things with long wires, smaller towers and beams. Last but not least there is "the other folks"...like me you either live in an apartment, townhouse and or have very strict neighborhood rules about all and any antennas!!! I am one who lives in a VERY antenna not so friendly place and I have to keep ham radio on the down low!! In my attic I have the DX-EE dipole from Alpha Delta it's good from 10m-40m but with the K3 antenna tuner I am able to add 17m and 30m. The attic is to small for the dipole to stretch from end to end, mine is in a "Z" configuration. It's about 25 to 30 feet off the ground but as said in the attic.



The SWR for such an antenna mounted undercover is below...
  7.000 - 7.060 = 2.58- 2.03 tuner brings it too 1.01
14.000 - 14.060= 2.26-2.08 tuner brings it too 1.01
21.000 - 21.060= 1.01-1.15
28.000 - 28.060= 1.15-1.12
Extra bands with tuner
18.068-18.100= 1.01-1.01 with tuner and 9.98 after tuner
10.100-10.130=1.01-1.01 with tuner and 9.13 after tuner.

So where can  5 watts QRP power and an attic antenna go??
Italy, Switzerland, Japan, Jordan, South Africa,  all of South America, England, Greece, Azerbaijan, Cyprus, Niger, Algeria,Gambia, Alaska,Turkey, Ascension Island.........and the list could go on!!

How about 1 watt........
Germany, England, Scotland, Italy, South Africa, Czech Republic, France, Ireland, Poland, Ukraine, Sweden,

Lets move things down to 100mW's
Portugal, Finland, Germany, Netherlands, Madeira Island, Spain, Croatia, Italy, Hungary, Czech Republic and so on.

Until I get an attenuator 100mW's is a low as my K3 will take me new adventures await me when my Hendricks 41dB step attenuator is built.
Some QRP highlights

1. Contact with HA8JV with 100mW's which worked out to 45,868 miles per watt contact.
2. This year I have worked 73 DXCC countries and am working towards my Diamond Jubilee award by year end.
3. Up to this point 80 contacts that are 1,000 miles per watt or more.
4. Lastly and most important......having a loads of fun!!!!!
If your situation does not allow you to install a dipole or similar medium size antenna my first QRP antennas were two mobile whip antennas made into a dipole configuration. With these antennas I was able to add to my 1000 miles per watt count......and more. So don't let some restrictions stop you from taking advantage of our hobby because less can mean more!!
UPDATE.......as Julian G4ILO has reminded me with his comment, I forgot to mention all the above was done with CW.

Gearing up for portable mobile op’s

The new "ham mobile"
Removing some metal from the K400
Well the summer is fast approaching and with it the warm weather. over the winter I started to get things ready for some summer portable op's from my car. It involved getting the Elecraft K2 mobile ready and
setting up an antenna system that was easy to deploy and worked well. Now there was a small hitch in the plans that happened about 2 weeks ago Julie and I decided to downsize our
Need another bag
New and improved mount

cars!! We both had large 4 door Chev Malibu's and loved them.....but so did the gas pumps! We both upgraded to the Scion IQ's half the gas and half the size. Now this meant plans had changed for my summer mobile portable operations....well not really. The Scion is a hatchback and I would just have to use my trunk mount Diamond K400 as a hatchback mount. There was just one small mod that had to be done to the mount to allow it to work on the Scion. That involved removing a small part of the flange that stopped the hatch from closing as it rubbed on the bumper. With that done the K400 fit perfectly on the Scion's hatchback. I was still going to use my faithful and reliable Palomar mono band mobile whips. With the Scion being a  much smaller car I was not sure what the reduced ground plain was going to do to the SWR?? I was prepping for the worst thinking that the SWR was going to be high no matter how I adjusted the stinger on the whip but the K2 antenna tuner would fix that. Well to my pleasure the 20m whip at 14.060 is 1.5 and the 40m whip at 7.030 is 1.4. This was with some adjusting of the length of the stinger but very pleasing
K400 installed
results. The two (for starters) mobile Palomar whips did not really fit into the old lawn chair bag as I had planned so I am going to have to come up with another plan for a carry sack for them. I am going to be stationary mobile....not sure I want to bang out CW whilst driving among the trucks and traffic on the highway!!  
SWR on 20m's


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