4 meters / 70 MHz 1/2 wave antenna.

For a long while i own a Ascom SE550... And i installed it in my shack, and it has been happilly hanging under a shelf next to my Kenwood TM-733e....

Well it was not that happy i think.. reason be the lack of an antenna....

I did not want to just walk in the store and buy one because i like to build antenna's to see if i can make something as good as a "professional" supplier. So i started to search for a design on internet and found....
http://www.70mhz.org/halfwav.htm   by by Ross Wilkinson G6GVI .

So i started to build one , but i could not seem to get it just right.... I could not get it to a SWR under 1:2.
Nothing els left to do then walk over to my neighbour (also a ham amateur) and tell him he would be without his mfj antenna analyser for the next few days.
Now this is never a problem, so i hooked up the MFJ and started to find a sweet spot for the coil, and experimented with different trimmers. Until i hit something which was good enough for me...

After getting to this... and yes i know it is not 1:1 and it is not 50 Ohm... but sufficient for what i want to do with it.
The guts of it look like this......

 

 

 

The door it is in front of is the entrance to my shack :)
Ok, this smal project is done, now back to focussing on my Bitx20!!

73's
Alex
PA1SBM