Time has shot by and once again I find myself having to service the old W3DZZ! It was way back in Feb 2013 that I last took it down and did a proper service so I think it’s about time I did do it again.
The first thing to do is to actually get it off the 40ft mast, it’s in an inverted Vee shape so it’s pretty easy to remove off the mast especially now as the leaves are yet to grow back on the various trees in and around the antenna.
Once removed off the mast, I have to disconnect the two 40m traps these are attached by four simple old choc blocks and on un-screwing they show their age by literally falling apart in my hands, hmm, time to replace with some new ones! Then it’s just a simple case of getting the old MFJ 259 out and seeing if the traps are still doing their job, the traps are indeed correct at around the 7.000MHz.
The traps having been re-taped and cleaned are now ready to be put back with the antenna. The actual trap designs are from GM0ONX webpage and is very easy to construct. If you're starting out on trap building, his website is well worth a visit and he explains in very easy terms how to construct his take on the W3DZZ design. He uses coax traps, so the winds are easy to do and don't seem too fiddly!
The MJF 259 with my homemade loop coupler for measuring the traps, loop couplers in the UK can be serious money!
Before I replace the choc blocks (I had to order some more), I’ll double check all the wire lengths again with the MFJ for SWR and I might trim on the 80 portion a wee bit so that I’m not just tuned in on CW. Nowadays I’m finding I like to listen in on some local chat on LSB and I would like the ability to join a QSO which should be a bit of fun.
The W3DZZ is mounted on the mast holding the cobweb(which has been taken down now)in an inverted Vee format and one of the wires come towards about where the picture was taken, the other end would finish up hanging near the hustler antenna to the left. Interestingly after messing about with different positions around the garden I always end up mounting in this way